mirror of
https://github.com/MessageKit/MessageKit.git
synced 2026-02-06 19:03:19 +00:00
Rich Gabrielli
115 lines
3.6 KiB
Swift
115 lines
3.6 KiB
Swift
/*
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MIT License
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Copyright (c) 2017-2018 MessageKit
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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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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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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 THE
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SOFTWARE.
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*/
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import UIKit
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open class PlayButtonView: UIView {
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// MARK: - Properties
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open let triangleView = UIView()
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private var triangleCenterXConstraint: NSLayoutConstraint?
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private var cacheFrame: CGRect = .zero
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// MARK: - Initializers
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public override init(frame: CGRect) {
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super.init(frame: frame)
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setupSubviews()
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setupConstraints()
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triangleView.clipsToBounds = true
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triangleView.backgroundColor = .black
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backgroundColor = .playButtonLightGray
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}
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required public init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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// MARK: - Methods
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open override func layoutSubviews() {
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super.layoutSubviews()
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guard !cacheFrame.equalTo(frame) else { return }
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cacheFrame = frame
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updateTriangleConstraints()
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applyCornerRadius()
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applyTriangleMask()
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}
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private func setupSubviews() {
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addSubview(triangleView)
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}
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private func setupConstraints() {
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triangleView.translatesAutoresizingMaskIntoConstraints = false
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let centerX = triangleView.centerXAnchor.constraint(equalTo: centerXAnchor)
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let centerY = triangleView.centerYAnchor.constraint(equalTo: centerYAnchor)
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let width = triangleView.widthAnchor.constraint(equalTo: widthAnchor, multiplier: 0.5)
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let height = triangleView.heightAnchor.constraint(equalTo: heightAnchor, multiplier: 0.5)
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triangleCenterXConstraint = centerX
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NSLayoutConstraint.activate([centerX, centerY, width, height])
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}
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private func triangleMask(for frame: CGRect) -> CAShapeLayer {
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let shapeLayer = CAShapeLayer()
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let trianglePath = UIBezierPath()
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let point1 = CGPoint(x: frame.minX, y: frame.minY)
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let point2 = CGPoint(x: frame.maxX, y: frame.maxY/2)
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let point3 = CGPoint(x: frame.minX, y: frame.maxY)
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trianglePath .move(to: point1)
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trianglePath .addLine(to: point2)
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trianglePath .addLine(to: point3)
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trianglePath .close()
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shapeLayer.path = trianglePath.cgPath
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return shapeLayer
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}
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private func updateTriangleConstraints() {
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triangleCenterXConstraint?.constant = frame.width/8
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}
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private func applyTriangleMask() {
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let rect = CGRect(origin: .zero, size: triangleView.bounds.size)
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triangleView.layer.mask = triangleMask(for: rect)
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}
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private func applyCornerRadius() {
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layer.cornerRadius = frame.width / 2
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}
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}
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