68 lines
2.3 KiB
Swift
68 lines
2.3 KiB
Swift
//
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// ZLProgressView.swift
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// ZLPhotoBrowser
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//
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// Created by long on 2020/8/13.
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//
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// Copyright (c) 2020 Long Zhang <495181165@qq.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import UIKit
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class ZLProgressView: UIView {
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private lazy var progressLayer: CAShapeLayer = {
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let layer = CAShapeLayer()
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layer.fillColor = UIColor.clear.cgColor
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layer.strokeColor = UIColor.white.cgColor
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layer.lineCap = .round
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layer.lineWidth = 4
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return layer
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}()
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var progress: CGFloat = 0 {
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didSet {
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self.setNeedsDisplay()
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}
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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backgroundColor = .clear
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layer.addSublayer(progressLayer)
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func draw(_ rect: CGRect) {
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let center = CGPoint(x: rect.width / 2, y: rect.height / 2)
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let radius = rect.width / 2
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let end = -(.pi / 2) + (.pi * 2 * progress)
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progressLayer.frame = bounds
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let path = UIBezierPath(arcCenter: center, radius: radius, startAngle: -(.pi / 2), endAngle: end, clockwise: true)
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progressLayer.path = path.cgPath
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}
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}
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