CircleProgressView.swift
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//
// CircleProgressView.swift
// Twear
//
// Created by yangbin on 2021/12/30.
//
import UIKit
class CircleProgressView: UIView {
private lazy var bgLayer: CAShapeLayer = CAShapeLayer()
// 延迟初始化进度条层，采用 stroke 来绘制边框
private lazy var progressLayer: CAShapeLayer = CAShapeLayer()
var value: Int = 0 {
didSet {
progressLayer.strokeEnd = CGFloat(value)/100
}
}
@IBOutlet weak var label: UILabel!
override init(frame: CGRect) {
super.init(frame: frame)
initFromNib()
setupUI()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
initFromNib()
setupUI()
}
override class func awakeFromNib() {
super.awakeFromNib()
}
private func setupUI() {
// 0.25 透明度的白色背景
bgLayer.fillColor = LineColor.cgColor
layer.addSublayer(bgLayer)
// 边框全白，边框宽度为 4
progressLayer = CAShapeLayer()
progressLayer.fillColor = nil
progressLayer.strokeColor = UIColor.rgbColorFromHex(0x1DDCC5).cgColor
progressLayer.lineWidth = self.frame.width/2
layer.addSublayer(progressLayer)
let radius = bounds.width / 2
bgLayer.path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: bounds.width, height: bounds.width), cornerRadius: radius).cgPath
// 设置 start 从 12点钟方向开始（默认是3点钟方向）
// end = 360度 * progress - start
// 设置为 顺时针 方向
let end = CGFloat(Double.pi * 2) - CGFloat(Double.pi / 2)
progressLayer.path = UIBezierPath(arcCenter: CGPoint(x: radius, y: radius), radius: radius/2,
startAngle: -CGFloat(Double.pi / 2), endAngle: end,
clockwise: true).cgPath
progressLayer.strokeEnd = 0
}
private func initFromNib() {
if let view = UINib(nibName: "CircleProgressView", bundle: Bundle(for: type(of: self))).instantiate(withOwner: self, options: nil).first as? UIView {
view.frame = bounds
self.addSubview(view)
}
}
override func layoutSubviews() {
refreshUI()
}
private func refreshUI() {
}
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
}