ios / ytwatch

  YYText
  ==============
  [![License MIT](https://img.shields.io/badge/license-MIT-green.svg?style=flat)](https://raw.githubusercontent.com/ibireme/YYText/master/LICENSE) 
  [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) 
  [![CocoaPods](http://img.shields.io/cocoapods/v/YYText.svg?style=flat)](http://cocoapods.org/?q= YYText) 
  [![CocoaPods](http://img.shields.io/cocoapods/p/YYText.svg?style=flat)](http://cocoapods.org/?q= YYText) 
  [![Support](https://img.shields.io/badge/support-iOS%206%2B%20-blue.svg?style=flat)](https://www.apple.com/nl/ios/) 
  [![Build Status](https://travis-ci.org/ibireme/YYText.svg?branch=master)](https://travis-ci.org/ibireme/YYText)
  
  Powerful text framework for iOS to display and edit rich text.<br/>
  (It's a component of [YYKit](https://github.com/ibireme/YYKit))
  
  
  Features
  ==============
  
  - UILabel and UITextView API compatible
  - High performance asynchronous text layout and rendering
  - Extended CoreText attributes with more text effects
  - Text attachments with UIImage, UIView and CALayer
  - Custom highlight text range to allow user interact with
  - Text parser support (built in markdown/emoticon parser)
  - Text container path and exclusion paths support
  - Vertical form layout support (for CJK text)
  - Image and attributed text copy/paste support
  - Attributed text placeholder support
  - Custom keyboard view support
  - Undo and redo control
  - Attributed text archiver and unarchiver support
  - Multi-language and VoiceOver support
  - Interface Builder support
  - Fully documented
  
  
  Architecture
  ==============
  YYText vs TextKit
  
  <img src="https://raw.github.com/ibireme/YYText/master/Attributes/architecture.png" width="400">
  
  
  Text Attributes
  ==============
  
  ### YYText supported attributes
  <table>
    <thead>
      <tr>
        <th>Demo</th>
        <th>Attribute Name</th>
        <th>Class</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextAttachment.gif" width="200"></td>
        <td>TextAttachment</td>
        <td>YYTextAttachment</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextHighlight.gif" width="200"></td>
        <td>TextHighlight</td>
        <td>YYTextHighlight</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBinding.gif" width="200"></td>
        <td>TextBinding</td>
        <td>YYTextBinding</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextShadow.png" width="200"></td>
        <td>TextShadow<br/>TextInnerShadow</td>
        <td>YYTextShadow</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBorder.png" width="200"></td>
        <td>TextBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBackgroundBorder.png" width="200"></td>
        <td>TextBackgroundBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBlockBorder.png" width="200"></td>
        <td>TextBlockBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Obliqueness.png" width="200"></td>
        <td>TextGlyphTransform</td>
        <td> NSValue(CGAffineTransform)</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Underline.png" width="200"></td>
        <td>TextUnderline</td>
        <td>YYTextDecoration</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Strikethrough.png" width="200"></td>
        <td>TextStrickthrough</td>
        <td>YYTextDecoration</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBackedString.png" width="200"></td>
        <td>TextBackedString</td>
        <td>YYTextBackedString</td>
      </tr>
    </tbody>
  </table>
  
  ###CoreText attributes which is supported by YYText
  <table>
    <thead>
      <tr>
        <th>Demo</th>
        <th>Attribute Name</th>
        <th>Class</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Font.png" width="200"></td>
        <td> Font </td>
        <td>UIFont(CTFontRef)</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Kern.png" width="200"></td>
        <td> Kern </td>
        <td>NSNumber</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Stroke.png" width="200"></td>
        <td> StrokeWidth </td>
        <td> NSNumber </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/StrokeColor.png" width="200"></td>
        <td> StrokeColor </td>
        <td> CGColorRef </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Shadow.png" width="200"></td>
        <td> Shadow </td>
        <td> NSShadow </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Ligature.png" width="200"></td>
        <td> Ligature </td>
        <td> NSNumber </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/VerticalForms.png" width="200"></td>
        <td> VerticalGlyphForm </td>
        <td> NSNumber(BOOL) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/WriteDirection.png" width="200"></td>
        <td> WritingDirection </td>
        <td> NSArray(NSNumber) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/RunDelegate.png" width="200"></td>
        <td> RunDelegate </td>
        <td> CTRunDelegateRef </td>
      </tr>
      
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/Alignment.png" width="200"></td>
        <td> TextAlignment </td>
        <td> NSParagraphStyle <br/>(NSTextAlignment) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineBreakMode.png" width="200"></td>
        <td> LineBreakMode </td>
        <td> NSParagraphStyle <br/>(NSLineBreakMode) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineSpacing.png" width="200"></td>
        <td> LineSpacing </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/ParagraphSpacing.png" width="200"></td>
        <td> ParagraphSpacing <br/> ParagraphSpacingBefore </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/FirstLineHeadIndent.png" width="200"></td>
        <td> FirstLineHeadIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/HeadIndent.png" width="200"></td>
        <td> HeadIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/TailIndent.png" width="200"></td>
        <td> TailIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/MinimumLineHeight.png" width="200"></td>
        <td> MinimumLineHeight </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/MaximumLineHeight.png" width="200"></td>
        <td> MaximumLineHeight </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineHeightMultiple.png" width="200"></td>
        <td> LineHeightMultiple </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/BaseWritingDirection.png" width="200"></td>
        <td> BaseWritingDirection </td>
        <td> NSParagraphStyle <br/>(NSWritingDirection) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/Tab.png" width="200"></td>
        <td> DefaultTabInterval <br/> TabStops </td>
        <td> NSParagraphStyle <br/>CGFloat/NSArray(NSTextTab)</td>
      </tr>
    </tbody>
  </table>
  
  
  Usage
  ==============
  
  ### Basic
      // YYLabel (similar to UILabel)
      YYLabel *label = [YYLabel new];
      label.frame = ...
      label.font = ...
      label.textColor = ...
      label.textAlignment = ...
      label.lineBreakMode = ...
      label.numberOfLines = ...
      label.text = ...
      
      // YYTextView (similar to UITextView)
      YYTextView *textView = [YYTextView new];
      textView.frame = ...
      textView.font = ...
      textView.textColor = ...
      textView.dataDetectorTypes = ...
      textView.placeHolderText = ...
      textView.placeHolderTextColor = ...
      textView.delegate = ...
      
  
  ### Attributed text
      
      // 1. Create an attributed string.
      NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Some Text, blabla..."];
      
      // 2. Set attributes to text, you can use almost all CoreText attributes.
      text.yy_font = [UIFont boldSystemFontOfSize:30];
      text.yy_color = [UIColor blueColor];
      [text yy_setColor:[UIColor redColor] range:NSMakeRange(0, 4)];
      text.yy_lineSpacing = 10;
      
      // 3. Set to YYLabel or YYTextView.
      YYLabel *label = [YYLabel new];
      label.frame = ...
      label.attributedString = text;
      
      YYTextView *textView = [YYTextView new];
      textView.frame = ...
      textView.attributedString = text;
      
  ### Text highlight
      
  You can use some convenience methods to set text highlight:
  
  	[text yy_setTextHighlightRange:range
                              color:[UIColor blueColor]
                    backgroundColor:[UIColor grayColor]
                          tapAction:^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect){ 
                              NSLog(@"tap text range:..."); 
                          }];
      
  Or set the text highlight with your custom config:
      
      // 1. Create a 'highlight' attribute for text.
      YYTextBorder *border = [YYTextBorder borderWithFillColor:[UIColor grayColor] cornerRadius:3];
          
      YYTextHighlight *highlight = [YYTextHighlight new];
      [highlight setColor:[UIColor whiteColor]];
      [highlight setBackgroundBorder:highlightBorder];
      highlight.tapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
        NSLog(@"tap text range:..."); 
        // you can also set the action handler to YYLabel or YYTextView.
      };
      
      // 2. Add 'highlight' attribute to a range of text.
      [attributedText yy_setTextHighlight:highlight range:highlightRange];
      
      // 3. Set text to label or text view.
      YYLabel *label = ...
      label.attributedText = attributedText
      
      YYTextView *textView = ...
      textView.attributedText = ...
      
      // 4. Receive user interactive action.
      label.highlightTapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
          NSLog(@"tap text range:...");
      };
      label.highlightLongPressAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
          NSLog(@"long press text range:...");
      };
      
      @UITextViewDelegate
      - (void)textView:(YYTextView *)textView didTapHighlight:(YYTextHighlight *)highlight inRange:(NSRange)characterRange rect:(CGRect)rect {
          NSLog(@"tap text range:...");
      }
      - (void)textView:(YYTextView *)textView didLongPressHighlight:(YYTextHighlight *)highlight inRange:(NSRange)characterRange rect:(CGRect)rect {
          NSLog(@"long press text range:...");
      }
  
  
  ### Text attachments
  
  	NSMutableAttributedString *text = [NSMutableAttributedString new];
  	UIFont *font = [UIFont systemFontOfSize:16];
  	NSMutableAttributedString *attachment = nil;
  	
  	// UIImage attachment
  	UIImage *image = [UIImage imageNamed:@"dribbble64_imageio"];
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:image contentMode:UIViewContentModeCenter attachmentSize:image.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  	
  	// UIView attachment
  	UISwitch *switcher = [UISwitch new];
      [switcher sizeToFit];
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:switcher contentMode:UIViewContentModeBottom attachmentSize:switcher.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  	
  	// CALayer attachment
  	CASharpLayer *layer = [CASharpLayer layer];
  	layer.path = ...
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:layer contentMode:UIViewContentModeBottom attachmentSize:switcher.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  
  
  ### Text layout calculation
  	
  	NSAttributedString *text = ...
  	CGSize size = CGSizeMake(100, CGFLOAT_MAX);
  	YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:size text:text];
  	
  	// get text bounding
  	layout.textBoundingRect; // get bounding rect
  	layout.textBoundingSize; // get bounding size
  	
  	 // query text layout
  	[layout lineIndexForPoint:CGPointMake(10,10)];
  	[layout closestLineIndexForPoint:CGPointMake(10,10)];
  	[layout closestPositionToPoint:CGPointMake(10,10)];
  	[layout textRangeAtPoint:CGPointMake(10,10)];
  	[layout rectForRange:[YYTextRange rangeWithRange:NSMakeRange(10,2)]];
  	[layout selectionRectsForRange:[YYTextRange rangeWithRange:NSMakeRange(10,2)]];
  	
  	// text layout display
  	YYLabel *label = [YYLabel new];
  	label.size = layout.textBoundingSize;
  	label.textLayout = layout;
  
  
  ### Adjust text line position
  	
  	// Convenience methods:
  	// 1. Create a text line position modifier, implements `YYTextLinePositionModifier` protocol.
  	// 2. Set it to label or text view.
  	
  	YYTextLinePositionSimpleModifier *modifier = [YYTextLinePositionSimpleModifier new];
  	modifier.fixedLineHeight = 24;
  	
  	YYLabel *label = [YYLabel new];
  	label.linePositionModifier = modifier;
  	
  	// Fully control
  	YYTextLinePositionSimpleModifier *modifier = [YYTextLinePositionSimpleModifier new];
  	modifier.fixedLineHeight = 24;
  	
  	YYTextContainer *container = [YYTextContainer new];
  	container.size = CGSizeMake(100, CGFLOAT_MAX);
  	container.linePositionModifier = modifier;
  	
  	YYTextLayout *layout = [YYTextLayout layoutWithContainer:container text:text];
  	YYLabel *label = [YYLabel new];
  	label.size = layout.textBoundingSize;
  	label.textLayout = layout;
  	
  	
  ### Asynchronous layout and rendering
      
      // If you have performance issues,
      // you may enable the asynchronous display mode.
      YYLabel *label = ...
      label.displaysAsynchronously = YES;
      
      // If you want to get the highest performance, you should do 
      // text layout with `YYTextLayout` class in background thread.
      YYLabel *label = [YYLabel new];
      label.displaysAsynchronously = YES;
      label.ignoreCommonProperties = YES;
      
      dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
          // Create attributed string.
          NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Some Text"];
          text.yy_font = [UIFont systemFontOfSize:16];
          text.yy_color = [UIColor grayColor];
          [text yy_setColor:[UIColor redColor] range:NSMakeRange(0, 4)];
   	
          // Create text container
          YYTextContainer *container = [YYTextContainer new];
          container.size = CGSizeMake(100, CGFLOAT_MAX);
          container.maximumNumberOfRows = 0;
          
          // Generate a text layout.
          YYTextLayout *layout = [YYTextLayout layoutWithContainer:container text:text];
          
          dispatch_async(dispatch_get_main_queue(), ^{
              label.size = layout.textBoundingSize;
              label.textLayout = layout;
          });
      });
  
  
  ### Text container control
  
  	YYLabel *label = ...
  	label.textContainerPath = [UIBezierPath bezierPathWith...];
  	label.exclusionPaths = 	@[[UIBezierPath bezierPathWith...];,...];
  	label.textContainerInset = UIEdgeInsetsMake(...);
  	label.verticalForm = YES/NO;
      
      YYTextView *textView = ...
  	textView.exclusionPaths = 	@[[UIBezierPath bezierPathWith...];,...];
  	textView.textContainerInset = UIEdgeInsetsMake(...);
  	textView.verticalForm = YES/NO;
      
  ### Text parser
  	// 1. Create a text parser
  	
      YYTextSimpleEmoticonParser *parser = [YYTextSimpleEmoticonParser new];
      NSMutableDictionary *mapper = [NSMutableDictionary new];
      mapper[@":smile:"] = [UIImage imageNamed:@"smile.png"];
      mapper[@":cool:"] = [UIImage imageNamed:@"cool.png"];
      mapper[@":cry:"] = [UIImage imageNamed:@"cry.png"];
      mapper[@":wink:"] = [UIImage imageNamed:@"wink.png"];
      parser.emoticonMapper = mapper;
  	
  	YYTextSimpleMarkdownParser *parser = [YYTextSimpleMarkdownParser new];
      [parser setColorWithDarkTheme];
      
      MyCustomParser *parser = ... // custom parser
      
      // 2. Attach parser to label or text view
      YYLabel *label = ...
      label.textParser = parser;
      
      YYTextView *textView = ...
      textView.textParser = parser;
     
  ### Debug
  
      // Set a shared debug option to show text layout result.
      YYTextDebugOption *debugOptions = [YYTextDebugOption new];
      debugOptions.baselineColor = [UIColor redColor];
      debugOptions.CTFrameBorderColor = [UIColor redColor];
      debugOptions.CTLineFillColor = [UIColor colorWithRed:0.000 green:0.463 blue:1.000 alpha:0.180];
      debugOptions.CGGlyphBorderColor = [UIColor colorWithRed:1.000 green:0.524 blue:0.000 alpha:0.200];
      [YYTextDebugOption setSharedDebugOption:debugOptions];
  
  
  ### More examples
  See `Demo/YYTextDemo.xcodeproj` for more examples:
  
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_path.gif" width="320">
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_markdown.gif" width="320">
  <br/> <br/>
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_vertical.gif" width="320">
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_paste.gif" width="320">
  
  
  Installation
  ==============
  
  ### CocoaPods
  
  1. Add `pod 'YYText'` to your Podfile.
  2. Run `pod install` or `pod update`.
  3. Import \<YYText/YYText.h\>.
  
  
  ### Carthage
  
  1. Add `github "ibireme/YYText"` to your Cartfile.
  2. Run `carthage update --platform ios` and add the framework to your project.
  3. Import \<YYText/YYText.h\>.
  
  
  ### Manually
  
  1. Download all the files in the `YYText` subdirectory.
  2. Add the source files to your Xcode project.
  3. Link with required frameworks:
      * UIKit
      * CoreFoundation
      * CoreText
      * QuartzCore
      * Accelerate
      * MobileCoreServices
  4. Import `YYText.h`.
  
  
  ### Notice
  You may add [YYImage](https://github.com/ibireme/YYImage) or [YYWebImage](https://github.com/ibireme/YYWebImage) to your project if you want to support animated image (GIF/APNG/WebP).
  
  
  Documentation
  ==============
  Full API documentation is available on [CocoaDocs](http://cocoadocs.org/docsets/YYText/).<br/>
  You can also install documentation locally using [appledoc](https://github.com/tomaz/appledoc).
  
  
  Requirements
  ==============
  This library requires `iOS 6.0+` and `Xcode 7.0+`.
  
  
  License
  ==============
  YYText is released under the MIT license. See LICENSE file for details.
  
  
  <br/><br/>
  ---
  中文介绍
  ==============
  功能强大的 iOS 富文本编辑与显示框架。<br/>
  (该项目是 [YYKit](https://github.com/ibireme/YYKit) 组件之一)
  
  
  特性
  ==============
  - API 兼容 UILabel 和 UITextView
  - 支持高性能的异步排版和渲染
  - 扩展了 CoreText 的属性以支持更多文字效果
  - 支持 UIImage、UIView、CALayer 作为图文混排元素
  - 支持添加自定义样式的、可点击的文本高亮范围
  - 支持自定义文本解析 (内置简单的 Markdown/表情解析)
  - 支持文本容器路径、内部留空路径的控制
  - 支持文字竖排版，可用于编辑和显示中日韩文本
  - 支持图片和富文本的复制粘贴
  - 文本编辑时，支持富文本占位符
  - 支持自定义键盘视图
  - 撤销和重做次数的控制
  - 富文本的序列化与反序列化支持
  - 支持多语言，支持 VoiceOver
  - 支持 Interface Builder
  - 全部代码都有文档注释
  
  
  架构
  ==============
  YYText 和 TextKit 架构对比
  
  <img src="https://raw.github.com/ibireme/YYText/master/Attributes/architecture.png" width="400">
  
  
  文本属性
  ==============
  
  ### YYText 原生支持的属性
  <table>
    <thead>
      <tr>
        <th>Demo</th>
        <th>Attribute Name</th>
        <th>Class</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextAttachment.gif" width="200"></td>
        <td>TextAttachment</td>
        <td>YYTextAttachment</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextHighlight.gif" width="200"></td>
        <td>TextHighlight</td>
        <td>YYTextHighlight</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBinding.gif" width="200"></td>
        <td>TextBinding</td>
        <td>YYTextBinding</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextShadow.png" width="200"></td>
        <td>TextShadow<br/>TextInnerShadow</td>
        <td>YYTextShadow</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBorder.png" width="200"></td>
        <td>TextBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBackgroundBorder.png" width="200"></td>
        <td>TextBackgroundBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBlockBorder.png" width="200"></td>
        <td>TextBlockBorder</td>
        <td>YYTextBorder</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Obliqueness.png" width="200"></td>
        <td>TextGlyphTransform</td>
        <td> NSValue(CGAffineTransform)</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Underline.png" width="200"></td>
        <td>TextUnderline</td>
        <td>YYTextDecoration</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Strikethrough.png" width="200"></td>
        <td>TextStrickthrough</td>
        <td>YYTextDecoration</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/YYText Extended/YYTextBackedString.png" width="200"></td>
        <td>TextBackedString</td>
        <td>YYTextBackedString</td>
      </tr>
    </tbody>
  </table>
  
  ###YYText 支持的 CoreText 属性
  <table>
    <thead>
      <tr>
        <th>Demo</th>
        <th>Attribute Name</th>
        <th>Class</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Font.png" width="200"></td>
        <td> Font </td>
        <td>UIFont(CTFontRef)</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Kern.png" width="200"></td>
        <td> Kern </td>
        <td>NSNumber</td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Stroke.png" width="200"></td>
        <td> StrokeWidth </td>
        <td> NSNumber </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/StrokeColor.png" width="200"></td>
        <td> StrokeColor </td>
        <td> CGColorRef </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Shadow.png" width="200"></td>
        <td> Shadow </td>
        <td> NSShadow </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Ligature.png" width="200"></td>
        <td> Ligature </td>
        <td> NSNumber </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/VerticalForms.png" width="200"></td>
        <td> VerticalGlyphForm </td>
        <td> NSNumber(BOOL) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/WriteDirection.png" width="200"></td>
        <td> WritingDirection </td>
        <td> NSArray(NSNumber) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/RunDelegate.png" width="200"></td>
        <td> RunDelegate </td>
        <td> CTRunDelegateRef </td>
      </tr>
      
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/Alignment.png" width="200"></td>
        <td> TextAlignment </td>
        <td> NSParagraphStyle <br/>(NSTextAlignment) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineBreakMode.png" width="200"></td>
        <td> LineBreakMode </td>
        <td> NSParagraphStyle <br/>(NSLineBreakMode) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineSpacing.png" width="200"></td>
        <td> LineSpacing </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/ParagraphSpacing.png" width="200"></td>
        <td> ParagraphSpacing <br/> ParagraphSpacingBefore </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/FirstLineHeadIndent.png" width="200"></td>
        <td> FirstLineHeadIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/HeadIndent.png" width="200"></td>
        <td> HeadIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/TailIndent.png" width="200"></td>
        <td> TailIndent </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/MinimumLineHeight.png" width="200"></td>
        <td> MinimumLineHeight </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/MaximumLineHeight.png" width="200"></td>
        <td> MaximumLineHeight </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/LineHeightMultiple.png" width="200"></td>
        <td> LineHeightMultiple </td>
        <td> NSParagraphStyle <br/>(CGFloat) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/BaseWritingDirection.png" width="200"></td>
        <td> BaseWritingDirection </td>
        <td> NSParagraphStyle <br/>(NSWritingDirection) </td>
      </tr>
      <tr>
        <td><img src="https://raw.github.com/ibireme/YYText/master/Attributes/CoreText and TextKit/Paragraph/Tab.png" width="200"></td>
        <td> DefaultTabInterval <br/> TabStops </td>
        <td> NSParagraphStyle <br/>CGFloat/NSArray(NSTextTab)</td>
      </tr>
    </tbody>
  </table>
  
  
  用法
  ==============
  
  ### 基本用法
      // YYLabel (和 UILabel 用法一致)
      YYLabel *label = [YYLabel new];
      label.frame = ...
      label.font = ...
      label.textColor = ...
      label.textAlignment = ...
      label.lineBreakMode = ...
      label.numberOfLines = ...
      label.text = ...
      
      // YYTextView (和 UITextView 用法一致)
      YYTextView *textView = [YYTextView new];
      textView.frame = ...
      textView.font = ...
      textView.textColor = ...
      textView.dataDetectorTypes = ...
      textView.placeHolderText = ...
      textView.placeHolderTextColor = ...
      textView.delegate = ...
      
  
  ### 属性文本
      
      // 1. 创建一个属性文本
      NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Some Text, blabla..."];
      
      // 2. 为文本设置属性
      text.yy_font = [UIFont boldSystemFontOfSize:30];
      text.yy_color = [UIColor blueColor];
      [text yy_setColor:[UIColor redColor] range:NSMakeRange(0, 4)];
      text.yy_lineSpacing = 10;
      
      // 3. 赋值到 YYLabel 或 YYTextView
      YYLabel *label = [YYLabel new];
      label.frame = ...
      label.attributedString = text;
      
      YYTextView *textView = [YYTextView new];
      textView.frame = ...
      textView.attributedString = text;
      
  
  ### 文本高亮
  
  你可以用一些已经封装好的简便方法来设置文本高亮：
  
  	[text yy_setTextHighlightRange:range
                              color:[UIColor blueColor]
                    backgroundColor:[UIColor grayColor]
                          tapAction:^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect){ 
                              NSLog(@"tap text range:..."); 
                          }];
  
  或者用更复杂的办法来调节文本高亮的细节：
      
      // 1. 创建一个"高亮"属性，当用户点击了高亮区域的文本时，"高亮"属性会替换掉原本的属性
      YYTextBorder *border = [YYTextBorder borderWithFillColor:[UIColor grayColor] cornerRadius:3];
          
      YYTextHighlight *highlight = [YYTextHighlight new];
      [highlight setColor:[UIColor whiteColor]];
      [highlight setBackgroundBorder:highlightBorder];
      highlight.tapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
        NSLog(@"tap text range:..."); 
        // 你也可以把事件回调放到 YYLabel 和 YYTextView 来处理。
      };
      
      // 2. 把"高亮"属性设置到某个文本范围
      [attributedText yy_setTextHighlight:highlight range:highlightRange];
      
      // 3. 把属性文本设置到 YYLabel 或 YYTextView
      YYLabel *label = ...
      label.attributedText = attributedText
      
      YYTextView *textView = ...
      textView.attributedText = ...
      
      // 4. 接受事件回调
      label.highlightTapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
          NSLog(@"tap text range:...");
      };
      label.highlightLongPressAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
          NSLog(@"long press text range:...");
      };
      
      @UITextViewDelegate
      - (void)textView:(YYTextView *)textView didTapHighlight:(YYTextHighlight *)highlight inRange:(NSRange)characterRange rect:(CGRect)rect {
          NSLog(@"tap text range:...");
      }
      - (void)textView:(YYTextView *)textView didLongPressHighlight:(YYTextHighlight *)highlight inRange:(NSRange)characterRange rect:(CGRect)rect {
          NSLog(@"long press text range:...");
      }
  
  
  ### 图文混排
  
  	NSMutableAttributedString *text = [NSMutableAttributedString new];
  	UIFont *font = [UIFont systemFontOfSize:16];
  	NSMutableAttributedString *attachment = nil;
  	
  	// 嵌入 UIImage
  	UIImage *image = [UIImage imageNamed:@"dribbble64_imageio"];
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:image contentMode:UIViewContentModeCenter attachmentSize:image.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  	
  	// 嵌入 UIView
  	UISwitch *switcher = [UISwitch new];
      [switcher sizeToFit];
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:switcher contentMode:UIViewContentModeBottom attachmentSize:switcher.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  	
  	// 嵌入 CALayer
  	CASharpLayer *layer = [CASharpLayer layer];
  	layer.path = ...
  	attachment = [NSMutableAttributedString yy_attachmentStringWithContent:layer contentMode:UIViewContentModeBottom attachmentSize:switcher.size alignToFont:font alignment:YYTextVerticalAlignmentCenter];
  	[text appendAttributedString: attachment];
  
  
  ### 文本布局计算
  	
  	NSAttributedString *text = ...
  	CGSize size = CGSizeMake(100, CGFLOAT_MAX);
  	YYTextLayout *layout = [YYTextLayout layoutWithContainerSize:size text:text];
  	
  	// 获取文本显示位置和大小
  	layout.textBoundingRect; // get bounding rect
  	layout.textBoundingSize; // get bounding size
  	
  	 // 查询文本排版结果
  	[layout lineIndexForPoint:CGPointMake(10,10)];
  	[layout closestLineIndexForPoint:CGPointMake(10,10)];
  	[layout closestPositionToPoint:CGPointMake(10,10)];
  	[layout textRangeAtPoint:CGPointMake(10,10)];
  	[layout rectForRange:[YYTextRange rangeWithRange:NSMakeRange(10,2)]];
  	[layout selectionRectsForRange:[YYTextRange rangeWithRange:NSMakeRange(10,2)]];
  	
  	// 显示文本排版结果
  	YYLabel *label = [YYLabel new];
  	label.size = layout.textBoundingSize;
  	label.textLayout = layout;
  
  	
  ### 文本行位置调整
  
  	// 由于中文、英文、Emoji 等字体高度不一致，或者富文本中出现了不同字号的字体，
  	// 可能会造成每行文字的高度不一致。这里可以添加一个修改器来实现固定行高，或者自定义文本行位置。
    
  	// 简单的方法:
  	// 1. 创建一个文本行位置修改类，实现 `YYTextLinePositionModifier` 协议。
  	// 2. 设置到 Label 或 TextView。
  	
  	YYTextLinePositionSimpleModifier *modifier = [YYTextLinePositionSimpleModifier new];
  	modifier.fixedLineHeight = 24;
  	
  	YYLabel *label = [YYLabel new];
  	label.linePositionModifier = modifier;
  	
  	// 完全控制:
  	YYTextLinePositionSimpleModifier *modifier = [YYTextLinePositionSimpleModifier new];
  	modifier.fixedLineHeight = 24;
  	
  	YYTextContainer *container = [YYTextContainer new];
  	container.size = CGSizeMake(100, CGFLOAT_MAX);
  	container.linePositionModifier = modifier;
  	
  	YYTextLayout *layout = [YYTextLayout layoutWithContainer:container text:text];
  	YYLabel *label = [YYLabel new];
  	label.size = layout.textBoundingSize;
  	label.textLayout = layout;
  
  
  ### 异步排版和渲染
      
      // 如果你在显示字符串时有性能问题，可以这样开启异步模式：
      YYLabel *label = ...
      label.displaysAsynchronously = YES;
      
      // 如果需要获得最高的性能，你可以在后台线程用 `YYTextLayout` 进行预排版： 
      YYLabel *label = [YYLabel new];
      label.displaysAsynchronously = YES; //开启异步绘制
      label.ignoreCommonProperties = YES; //忽略除了 textLayout 之外的其他属性
      
      dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
          // 创建属性字符串
          NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Some Text"];
          text.yy_font = [UIFont systemFontOfSize:16];
          text.yy_color = [UIColor grayColor];
          [text yy_setColor:[UIColor redColor] range:NSMakeRange(0, 4)];
   
          // 创建文本容器
          YYTextContainer *container = [YYTextContainer new];
          container.size = CGSizeMake(100, CGFLOAT_MAX);
          container.maximumNumberOfRows = 0;
          
          // 生成排版结果
          YYTextLayout *layout = [YYTextLayout layoutWithContainer:container text:text];
          
          dispatch_async(dispatch_get_main_queue(), ^{
              label.size = layout.textBoundingSize;
              label.textLayout = layout;
          });
      });
  
  
  ### 文本容器控制
  
  	YYLabel *label = ...
  	label.textContainerPath = [UIBezierPath bezierPathWith...];
  	label.exclusionPaths = 	@[[UIBezierPath bezierPathWith...];,...];
  	label.textContainerInset = UIEdgeInsetsMake(...);
  	label.verticalForm = YES/NO;
      
      YYTextView *textView = ...
  	textView.exclusionPaths = 	@[[UIBezierPath bezierPathWith...];,...];
  	textView.textContainerInset = UIEdgeInsetsMake(...);
  	textView.verticalForm = YES/NO;
      
  
  ### 文本解析
  	// 1. 创建一个解析器
  	
  	// 内置简单的表情解析
      YYTextSimpleEmoticonParser *parser = [YYTextSimpleEmoticonParser new];
      NSMutableDictionary *mapper = [NSMutableDictionary new];
      mapper[@":smile:"] = [UIImage imageNamed:@"smile.png"];
      mapper[@":cool:"] = [UIImage imageNamed:@"cool.png"];
      mapper[@":cry:"] = [UIImage imageNamed:@"cry.png"];
      mapper[@":wink:"] = [UIImage imageNamed:@"wink.png"];
      parser.emoticonMapper = mapper;
  	
  	// 内置简单的 markdown 解析
  	YYTextSimpleMarkdownParser *parser = [YYTextSimpleMarkdownParser new];
      [parser setColorWithDarkTheme];
      
      // 实现 `YYTextParser` 协议的自定义解析器
      MyCustomParser *parser = ... 
      
      // 2. 把解析器添加到 YYLabel 或 YYTextView
      YYLabel *label = ...
      label.textParser = parser;
      
      YYTextView *textView = ...
      textView.textParser = parser;
  
  ### Debug
  
      // 设置一个全局的 debug option 来显示排版结果。
      YYTextDebugOption *debugOptions = [YYTextDebugOption new];
      debugOptions.baselineColor = [UIColor redColor];
      debugOptions.CTFrameBorderColor = [UIColor redColor];
      debugOptions.CTLineFillColor = [UIColor colorWithRed:0.000 green:0.463 blue:1.000 alpha:0.180];
      debugOptions.CGGlyphBorderColor = [UIColor colorWithRed:1.000 green:0.524 blue:0.000 alpha:0.200];
      [YYTextDebugOption setSharedDebugOption:debugOptions];
  
  ### 更多示例
  查看演示工程 `Demo/YYTextDemo.xcodeproj`:
  
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_path.gif" width="320">
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_markdown.gif" width="320">
  <br/> <br/>
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_vertical.gif" width="320">
  <img src="https://raw.github.com/ibireme/YYText/master/Demo/DemoSnapshot/text_paste.gif" width="320">
  
  
  安装
  ==============
  
  ### CocoaPods
  
  1. 在 Podfile 中添加 `pod 'YYText'`。
  2. 执行 `pod install` 或 `pod update`。
  3. 导入 \<YYText/YYText.h\>。
  
  
  ### Carthage
  
  1. 在 Cartfile 中添加 `github "ibireme/YYText"`。
  2. 执行 `carthage update --platform ios` 并将生成的 framework 添加到你的工程。
  3. 导入 \<YYText/YYText.h\>。
  
  
  ### 手动安装
  
  1. 下载 YYText 文件夹内的所有内容。
  2. 将 YYText 内的源文件添加(拖放)到你的工程。
  3. 链接以下 frameworks:
      * UIKit
      * CoreFoundation
      * CoreText
      * QuartzCore
      * Accelerate
      * MobileCoreServices
  4. 导入 `YYText.h`。
  
  
  ### 注意
  你可以添加 [YYImage](https://github.com/ibireme/YYImage) 或 [YYWebImage](https://github.com/ibireme/YYWebImage) 到你的工程，以支持动画格式(GIF/APNG/WebP)的图片。
  
  
  文档
  ==============
  你可以在 [CocoaDocs](http://cocoadocs.org/docsets/YYText/) 查看在线 API 文档，也可以用 [appledoc](https://github.com/tomaz/appledoc) 本地生成文档。
  
  
  系统要求
  ==============
  该项目最低支持 `iOS 6.0` 和 `Xcode 7.0`。
  
  
  已知问题
  ==============
  * YYText 并不能支持所有 CoreText/TextKit 的属性，比如 NSBackgroundColor、NSStrikethrough、NSUnderline、NSAttachment、NSLink 等，但 YYText 中基本都有对应属性作为替代。详情见上方表格。
  * YYTextView 未实现局部刷新，所以在输入和编辑大量的文本（比如超过大概五千个汉字、或大概一万个英文字符）时会出现较明显的卡顿现象。
  * 竖排版时，添加 exclusionPaths 在少数情况下可能会导致文本显示空白。
  * 当添加了非矩形的 textContainerPath，并且有嵌入大于文本排版方向宽度的 RunDelegate 时，RunDelegate 之后的文字会无法显示。这是 CoreText 的 Bug（或者说是 Feature）。
  
  许可证
  ==============
  YYText 使用 MIT 许可证，详情见 LICENSE 文件。