121 lines
4.5 KiB
Swift
121 lines
4.5 KiB
Swift
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final class InputViewButton : UIView {
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private let icon: UIImage
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private let isSendButton: Bool
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private let delegate: InputViewButtonDelegate
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private lazy var widthConstraint = set(.width, to: InputViewButton.size)
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private lazy var heightConstraint = set(.height, to: InputViewButton.size)
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private var longPressTimer: Timer?
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private var isLongPress = false
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// MARK: Settings
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static let size = CGFloat(40)
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static let expandedSize = CGFloat(48)
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static let iconSize: CGFloat = 20
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// MARK: Lifecycle
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init(icon: UIImage, isSendButton: Bool = false, delegate: InputViewButtonDelegate) {
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self.icon = icon
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self.isSendButton = isSendButton
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self.delegate = delegate
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super.init(frame: CGRect.zero)
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setUpViewHierarchy()
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}
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override init(frame: CGRect) {
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preconditionFailure("Use init(icon:delegate:) instead.")
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}
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required init?(coder: NSCoder) {
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preconditionFailure("Use init(icon:delegate:) instead.")
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}
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private func setUpViewHierarchy() {
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backgroundColor = isSendButton ? Colors.accent : Colors.text.withAlphaComponent(0.05)
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layer.cornerRadius = InputViewButton.size / 2
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layer.masksToBounds = true
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isUserInteractionEnabled = true
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widthConstraint.isActive = true
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heightConstraint.isActive = true
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let tint = isSendButton ? UIColor.black : Colors.text
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let iconImageView = UIImageView(image: icon.withTint(tint))
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iconImageView.contentMode = .scaleAspectFit
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let iconSize = InputViewButton.iconSize
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iconImageView.set(.width, to: iconSize)
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iconImageView.set(.height, to: iconSize)
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addSubview(iconImageView)
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iconImageView.center(in: self)
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}
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// MARK: Animation
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private func animate(to size: CGFloat, glowColor: UIColor, backgroundColor: UIColor) {
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let frame = CGRect(center: center, size: CGSize(width: size, height: size))
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widthConstraint.constant = size
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heightConstraint.constant = size
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UIView.animate(withDuration: 0.25) {
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self.layoutIfNeeded()
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self.frame = frame
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self.layer.cornerRadius = size / 2
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let glowConfiguration = UIView.CircularGlowConfiguration(size: size, color: glowColor, isAnimated: true, radius: isLightMode ? 4 : 6)
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self.setCircularGlow(with: glowConfiguration)
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self.backgroundColor = backgroundColor
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}
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}
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private func expand() {
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animate(to: InputViewButton.expandedSize, glowColor: Colors.expandedButtonGlowColor, backgroundColor: Colors.accent)
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}
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private func collapse() {
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let backgroundColor = isSendButton ? Colors.accent : Colors.text.withAlphaComponent(0.05)
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animate(to: InputViewButton.size, glowColor: .clear, backgroundColor: backgroundColor)
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}
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// MARK: Interaction
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override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
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UIImpactFeedbackGenerator(style: .heavy).impactOccurred()
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expand()
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invalidateLongPressIfNeeded()
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longPressTimer = Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false, block: { [weak self] _ in
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guard let self = self else { return }
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self.isLongPress = true
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self.delegate.handleInputViewButtonLongPressBegan(self)
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})
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}
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override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
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if isLongPress {
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delegate.handleInputViewButtonLongPressMoved(self, with: touches.first!)
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}
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}
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override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
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collapse()
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if !isLongPress {
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delegate.handleInputViewButtonTapped(self)
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} else {
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delegate.handleInputViewButtonLongPressEnded(self, with: touches.first!)
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}
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invalidateLongPressIfNeeded()
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}
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override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
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collapse()
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invalidateLongPressIfNeeded()
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}
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private func invalidateLongPressIfNeeded() {
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longPressTimer?.invalidate()
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isLongPress = false
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}
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}
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// MARK: Delegate
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protocol InputViewButtonDelegate {
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func handleInputViewButtonTapped(_ inputViewButton: InputViewButton)
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func handleInputViewButtonLongPressBegan(_ inputViewButton: InputViewButton)
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func handleInputViewButtonLongPressMoved(_ inputViewButton: InputViewButton, with touch: UITouch)
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func handleInputViewButtonLongPressEnded(_ inputViewButton: InputViewButton, with touch: UITouch)
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}
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