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//
// LoaderShape.swift
// LoaderButton
//
// Created by 黄进文 on 2018/6/11.
// Copyright © 2018年 Jovins. All rights reserved.
//
import UIKit
enum LoaderShape {
case ring
case ringVertical
case ringHorizontal
case ringThirdFour
case circle
case circleSemi
case line
case stroke
case rectangle
case triangle
case pacman
/// Return CALayer of specific shape
/// - Parameters:
/// - size: size of draw shape area
/// - color: stroke color of shape
func layer(with size: CGSize, color: UIColor) -> CALayer {
let layer: CAShapeLayer = LoaderLayer()
var path: UIBezierPath = UIBezierPath()
let lineWidth: CGFloat = 1
switch self {
case .ring:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: (size.width * 0.5),
startAngle: CGFloat(-3 * Double.pi / 4),
endAngle: CGFloat(-Double.pi / 4),
clockwise: false)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = 2
case .ringVertical:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(-3 * Double.pi / 4),
endAngle: CGFloat(-Double.pi / 4),
clockwise: true) /// clockwise: 顺时针
path.move(to: CGPoint(x: size.width * 0.5 - size.width * 0.5 * cos(CGFloat(Double.pi / 4)),
y: size.height * 0.5 + size.height * 0.5 * sin(CGFloat(Double.pi / 4))))
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(-5 * Double.pi / 4),
endAngle: CGFloat(-7 * Double.pi / 4), clockwise: false)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = lineWidth
case .ringHorizontal:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(3 * Double.pi / 4),
endAngle: CGFloat(5 * Double.pi / 4),
clockwise: true)
path.move(to: CGPoint(x: size.width * 0.5 + size.width * 0.5 * cos(CGFloat(Double.pi / 4)),
y: size.height * 0.5 - size.height * 0.5 * sin(CGFloat(Double.pi / 4))))
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(-Double.pi / 4),
endAngle: CGFloat(Double.pi / 4),
clockwise: true)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = lineWidth
case .ringThirdFour:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(-3 * Double.pi / 4),
endAngle: CGFloat(-Double.pi / 4),
clockwise: false)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = lineWidth
case .circle:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: 0,
endAngle: CGFloat(2 * Double.pi), clockwise: false)
layer.fillColor = color.cgColor
case .circleSemi:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: CGFloat(-Double.pi / 6),
endAngle: CGFloat(-5 * Double.pi / 6),
clockwise: false)
path.close()
layer.fillColor = color.cgColor
case .line:
path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: size.width, height: size.height),
cornerRadius: size.width * 0.5)
layer.fillColor = color.cgColor
case .stroke:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width * 0.5,
startAngle: -(.pi * 0.5),
endAngle: .pi + .pi * 0.5,
clockwise: true)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = lineWidth
case .rectangle:
path.move(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: size.width, y: 0))
path.addLine(to: CGPoint(x: size.width, y: size.height))
path.addLine(to: CGPoint(x: 0, y: size.height))
layer.fillColor = color.cgColor
case .triangle:
let offsetY = size.height / 4
path.move(to: CGPoint(x: 0, y: size.height - offsetY))
path.addLine(to: CGPoint(x: size.width * 0.5, y: size.height * 0.5 - offsetY))
path.addLine(to: CGPoint(x: size.width, y: size.height - offsetY))
path.close()
layer.fillColor = color.cgColor
case .pacman:
path.addArc(withCenter: CGPoint(x: size.width * 0.5, y: size.height * 0.5),
radius: size.width / 4,
startAngle: 0,
endAngle: CGFloat(2 * Double.pi),
clockwise: true)
layer.fillColor = nil
layer.strokeColor = color.cgColor
layer.lineWidth = size.width * 0.5
}
layer.backgroundColor = nil
layer.path = path.cgPath
layer.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
return layer
}
}
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