103 lines
3.2 KiB
Swift
103 lines
3.2 KiB
Swift
//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public class MediaUploadView: UIView {
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// MARK: -
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private let attachmentId: String
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private let radius: CGFloat
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private let shapeLayer1 = CAShapeLayer()
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private let shapeLayer2 = CAShapeLayer()
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private var isAttachmentReady: Bool = false
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private var lastProgress: CGFloat = 0
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@objc
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public required init(attachmentId: String, radius: CGFloat) {
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self.attachmentId = attachmentId
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self.radius = radius
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super.init(frame: .zero)
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layer.addSublayer(shapeLayer1)
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layer.addSublayer(shapeLayer2)
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}
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@available(*, unavailable, message: "use other init() instead.")
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required public init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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@objc public override var bounds: CGRect {
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didSet {
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if oldValue != bounds {
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updateLayers()
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}
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}
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}
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@objc public override var frame: CGRect {
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didSet {
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if oldValue != frame {
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updateLayers()
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}
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}
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}
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internal func updateLayers() {
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AssertIsOnMainThread()
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shapeLayer1.frame = self.bounds
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shapeLayer2.frame = self.bounds
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guard !isAttachmentReady else {
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shapeLayer1.path = nil
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shapeLayer2.path = nil
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return
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}
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// Prevent the shape layer from animating changes.
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CATransaction.begin()
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CATransaction.setDisableActions(true)
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let center = CGPoint(x: self.bounds.width * 0.5,
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y: self.bounds.height * 0.5)
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let outerRadius: CGFloat = radius * 1.0
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let innerRadius: CGFloat = radius * 0.9
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let startAngle: CGFloat = CGFloat.pi * 1.5
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let endAngle: CGFloat = CGFloat.pi * (1.5 + 2 * lastProgress)
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let bezierPath1 = UIBezierPath()
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bezierPath1.addArc(withCenter: center, radius: outerRadius, startAngle: startAngle, endAngle: endAngle, clockwise: true)
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bezierPath1.addArc(withCenter: center, radius: innerRadius, startAngle: endAngle, endAngle: startAngle, clockwise: false)
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shapeLayer1.path = bezierPath1.cgPath
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shapeLayer1.fillColor = UIColor.ows_white.cgColor
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let innerCircleBounds = CGRect(x: center.x - innerRadius,
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y: center.y - innerRadius,
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width: innerRadius * 2,
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height: innerRadius * 2)
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let outerCircleBounds = CGRect(x: center.x - outerRadius,
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y: center.y - outerRadius,
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width: outerRadius * 2,
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height: outerRadius * 2)
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let bezierPath2 = UIBezierPath()
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bezierPath2.append(UIBezierPath(ovalIn: innerCircleBounds))
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bezierPath2.append(UIBezierPath(ovalIn: outerCircleBounds))
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shapeLayer2.path = bezierPath2.cgPath
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shapeLayer2.fillColor = UIColor(white: 1.0, alpha: 0.4).cgColor
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shapeLayer2.fillRule = .evenOdd
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CATransaction.commit()
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}
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}
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