66 lines
2.3 KiB
Swift
66 lines
2.3 KiB
Swift
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class Sheet : BaseVC {
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private(set) var bottomConstraint: NSLayoutConstraint!
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// MARK: Settings
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let overshoot: CGFloat = 40
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class var isDismissable: Bool { true }
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// MARK: Components
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lazy var contentView: UIView = {
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let result = UIView()
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result.backgroundColor = Colors.modalBackground
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result.layer.cornerRadius = 24
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result.layer.masksToBounds = false
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result.layer.borderColor = isLightMode ? UIColor.white.cgColor : Colors.modalBorder.cgColor
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result.layer.borderWidth = Values.borderThickness
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result.layer.shadowColor = UIColor.black.cgColor
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result.layer.shadowRadius = isLightMode ? 2 : 8
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result.layer.shadowOpacity = isLightMode ? 0.1 : 0.64
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return result
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}()
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// MARK: Lifecycle
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override func viewDidLoad() {
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super.viewDidLoad()
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let alpha = isLightMode ? CGFloat(0.1) : Values.modalBackgroundOpacity
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view.backgroundColor = UIColor(hex: 0x000000).withAlphaComponent(alpha)
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if type(of: self).isDismissable {
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let swipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(close))
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swipeGestureRecognizer.direction = .down
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view.addGestureRecognizer(swipeGestureRecognizer)
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}
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setUpViewHierarchy()
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}
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private func setUpViewHierarchy() {
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view.addSubview(contentView)
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contentView.pin(.leading, to: .leading, of: view, withInset: -Values.borderThickness)
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contentView.pin(.trailing, to: .trailing, of: view, withInset: Values.borderThickness)
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bottomConstraint = contentView.pin(.bottom, to: .bottom, of: view, withInset: overshoot)
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populateContentView()
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}
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/// To be overridden by subclasses.
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func populateContentView() {
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preconditionFailure("populateContentView() is abstract and must be overridden.")
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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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let touch = touches.first!
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let location = touch.location(in: view)
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if contentView.frame.contains(location) {
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super.touchesBegan(touches, with: event)
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} else {
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if type(of: self).isDismissable {
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close()
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}
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}
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}
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@objc func close() {
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dismiss(animated: true, completion: nil)
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}
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}
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