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// UIButton+AFNetworking.m
// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "UIButton+AFNetworking.h"
#import <objc/runtime.h>
#if TARGET_OS_IOS || TARGET_OS_TV
#import "UIImageView+AFNetworking.h"
#import "AFImageDownloader.h"
@interface UIButton (_AFNetworking)
@end
@implementation UIButton (_AFNetworking)
#pragma mark -
static char AFImageDownloadReceiptNormal;
static char AFImageDownloadReceiptHighlighted;
static char AFImageDownloadReceiptSelected;
static char AFImageDownloadReceiptDisabled;
static const char * af_imageDownloadReceiptKeyForState(UIControlState state) {
switch (state) {
case UIControlStateHighlighted:
return &AFImageDownloadReceiptHighlighted;
case UIControlStateSelected:
return &AFImageDownloadReceiptSelected;
case UIControlStateDisabled:
return &AFImageDownloadReceiptDisabled;
case UIControlStateNormal:
default:
return &AFImageDownloadReceiptNormal;
}
}
- (AFImageDownloadReceipt *)af_imageDownloadReceiptForState:(UIControlState)state {
return (AFImageDownloadReceipt *)objc_getAssociatedObject(self, af_imageDownloadReceiptKeyForState(state));
}
- (void)af_setImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt
forState:(UIControlState)state
{
objc_setAssociatedObject(self, af_imageDownloadReceiptKeyForState(state), imageDownloadReceipt, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
#pragma mark -
static char AFBackgroundImageDownloadReceiptNormal;
static char AFBackgroundImageDownloadReceiptHighlighted;
static char AFBackgroundImageDownloadReceiptSelected;
static char AFBackgroundImageDownloadReceiptDisabled;
static const char * af_backgroundImageDownloadReceiptKeyForState(UIControlState state) {
switch (state) {
case UIControlStateHighlighted:
return &AFBackgroundImageDownloadReceiptHighlighted;
case UIControlStateSelected:
return &AFBackgroundImageDownloadReceiptSelected;
case UIControlStateDisabled:
return &AFBackgroundImageDownloadReceiptDisabled;
case UIControlStateNormal:
default:
return &AFBackgroundImageDownloadReceiptNormal;
}
}
- (AFImageDownloadReceipt *)af_backgroundImageDownloadReceiptForState:(UIControlState)state {
return (AFImageDownloadReceipt *)objc_getAssociatedObject(self, af_backgroundImageDownloadReceiptKeyForState(state));
}
- (void)af_setBackgroundImageDownloadReceipt:(AFImageDownloadReceipt *)imageDownloadReceipt
forState:(UIControlState)state
{
objc_setAssociatedObject(self, af_backgroundImageDownloadReceiptKeyForState(state), imageDownloadReceipt, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
@end
#pragma mark -
@implementation UIButton (AFNetworking)
+ (AFImageDownloader *)sharedImageDownloader {
return objc_getAssociatedObject([UIButton class], @selector(sharedImageDownloader)) ?: [AFImageDownloader defaultInstance];
}
+ (void)setSharedImageDownloader:(AFImageDownloader *)imageDownloader {
objc_setAssociatedObject([UIButton class], @selector(sharedImageDownloader), imageDownloader, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
#pragma mark -
- (void)setImageForState:(UIControlState)state
withURL:(NSURL *)url
{
[self setImageForState:state withURL:url placeholderImage:nil];
}
- (void)setImageForState:(UIControlState)state
withURL:(NSURL *)url
placeholderImage:(UIImage *)placeholderImage
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
[self setImageForState:state withURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
}
- (void)setImageForState:(UIControlState)state
withURLRequest:(NSURLRequest *)urlRequest
placeholderImage:(nullable UIImage *)placeholderImage
success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure
{
if ([self isActiveTaskURLEqualToURLRequest:urlRequest forState:state]) {
return;
}
[self cancelImageDownloadTaskForState:state];
AFImageDownloader *downloader = [[self class] sharedImageDownloader];
id <AFImageRequestCache> imageCache = downloader.imageCache;
//Use the image from the image cache if it exists
UIImage *cachedImage = [imageCache imageforRequest:urlRequest withAdditionalIdentifier:nil];
if (cachedImage) {
if (success) {
success(urlRequest, nil, cachedImage);
} else {
[self setImage:cachedImage forState:state];
}
[self af_setImageDownloadReceipt:nil forState:state];
} else {
if (placeholderImage) {
[self setImage:placeholderImage forState:state];
}
__weak __typeof(self)weakSelf = self;
NSUUID *downloadID = [NSUUID UUID];
AFImageDownloadReceipt *receipt;
receipt = [downloader
downloadImageForURLRequest:urlRequest
withReceiptID:downloadID
success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
__strong __typeof(weakSelf)strongSelf = weakSelf;
if ([[strongSelf af_imageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
if (success) {
success(request, response, responseObject);
} else if (responseObject) {
[strongSelf setImage:responseObject forState:state];
}
[strongSelf af_setImageDownloadReceipt:nil forState:state];
}
}
failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
__strong __typeof(weakSelf)strongSelf = weakSelf;
if ([[strongSelf af_imageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
if (failure) {
failure(request, response, error);
}
[strongSelf af_setImageDownloadReceipt:nil forState:state];
}
}];
[self af_setImageDownloadReceipt:receipt forState:state];
}
}
#pragma mark -
- (void)setBackgroundImageForState:(UIControlState)state
withURL:(NSURL *)url
{
[self setBackgroundImageForState:state withURL:url placeholderImage:nil];
}
- (void)setBackgroundImageForState:(UIControlState)state
withURL:(NSURL *)url
placeholderImage:(nullable UIImage *)placeholderImage
{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request addValue:@"image/*" forHTTPHeaderField:@"Accept"];
[self setBackgroundImageForState:state withURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
}
- (void)setBackgroundImageForState:(UIControlState)state
withURLRequest:(NSURLRequest *)urlRequest
placeholderImage:(nullable UIImage *)placeholderImage
success:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, UIImage *image))success
failure:(nullable void (^)(NSURLRequest *request, NSHTTPURLResponse * _Nullable response, NSError *error))failure
{
if ([self isActiveBackgroundTaskURLEqualToURLRequest:urlRequest forState:state]) {
return;
}
[self cancelBackgroundImageDownloadTaskForState:state];
AFImageDownloader *downloader = [[self class] sharedImageDownloader];
id <AFImageRequestCache> imageCache = downloader.imageCache;
//Use the image from the image cache if it exists
UIImage *cachedImage = [imageCache imageforRequest:urlRequest withAdditionalIdentifier:nil];
if (cachedImage) {
if (success) {
success(urlRequest, nil, cachedImage);
} else {
[self setBackgroundImage:cachedImage forState:state];
}
[self af_setBackgroundImageDownloadReceipt:nil forState:state];
} else {
if (placeholderImage) {
[self setBackgroundImage:placeholderImage forState:state];
}
__weak __typeof(self)weakSelf = self;
NSUUID *downloadID = [NSUUID UUID];
AFImageDownloadReceipt *receipt;
receipt = [downloader
downloadImageForURLRequest:urlRequest
withReceiptID:downloadID
success:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, UIImage * _Nonnull responseObject) {
__strong __typeof(weakSelf)strongSelf = weakSelf;
if ([[strongSelf af_backgroundImageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
if (success) {
success(request, response, responseObject);
} else if (responseObject) {
[strongSelf setBackgroundImage:responseObject forState:state];
}
[strongSelf af_setBackgroundImageDownloadReceipt:nil forState:state];
}
}
failure:^(NSURLRequest * _Nonnull request, NSHTTPURLResponse * _Nullable response, NSError * _Nonnull error) {
__strong __typeof(weakSelf)strongSelf = weakSelf;
if ([[strongSelf af_backgroundImageDownloadReceiptForState:state].receiptID isEqual:downloadID]) {
if (failure) {
failure(request, response, error);
}
[strongSelf af_setBackgroundImageDownloadReceipt:nil forState:state];
}
}];
[self af_setBackgroundImageDownloadReceipt:receipt forState:state];
}
}
#pragma mark -
- (void)cancelImageDownloadTaskForState:(UIControlState)state {
AFImageDownloadReceipt *receipt = [self af_imageDownloadReceiptForState:state];
if (receipt != nil) {
[[self.class sharedImageDownloader] cancelTaskForImageDownloadReceipt:receipt];
[self af_setImageDownloadReceipt:nil forState:state];
}
}
- (void)cancelBackgroundImageDownloadTaskForState:(UIControlState)state {
AFImageDownloadReceipt *receipt = [self af_backgroundImageDownloadReceiptForState:state];
if (receipt != nil) {
[[self.class sharedImageDownloader] cancelTaskForImageDownloadReceipt:receipt];
[self af_setBackgroundImageDownloadReceipt:nil forState:state];
}
}
- (BOOL)isActiveTaskURLEqualToURLRequest:(NSURLRequest *)urlRequest forState:(UIControlState)state {
AFImageDownloadReceipt *receipt = [self af_imageDownloadReceiptForState:state];
return [receipt.task.originalRequest.URL.absoluteString isEqualToString:urlRequest.URL.absoluteString];
}
- (BOOL)isActiveBackgroundTaskURLEqualToURLRequest:(NSURLRequest *)urlRequest forState:(UIControlState)state {
AFImageDownloadReceipt *receipt = [self af_backgroundImageDownloadReceiptForState:state];
return [receipt.task.originalRequest.URL.absoluteString isEqualToString:urlRequest.URL.absoluteString];
}
@end
#endif
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