83 lines
3.2 KiB
Swift
83 lines
3.2 KiB
Swift
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@objc(LKModal)
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class Modal : UIViewController {
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private(set) var verticalCenteringConstraint: NSLayoutConstraint!
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// MARK: Settings
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override var preferredStatusBarStyle: UIStatusBarStyle { return isLightMode ? .default : .lightContent }
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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 = Values.modalCornerRadius
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result.layer.masksToBounds = false
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result.layer.borderColor = 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 = 8
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result.layer.shadowOpacity = 0.64
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return result
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}()
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lazy var cancelButton: UIButton = {
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let result = UIButton()
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result.set(.height, to: Values.mediumButtonHeight)
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result.layer.cornerRadius = Values.modalButtonCornerRadius
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result.backgroundColor = Colors.buttonBackground
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result.titleLabel!.font = .systemFont(ofSize: Values.smallFontSize)
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result.setTitleColor(Colors.text, for: UIControl.State.normal)
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result.setTitle(NSLocalizedString("Cancel", comment: ""), for: UIControl.State.normal)
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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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view.backgroundColor = UIColor(hex: 0x000000).withAlphaComponent(Values.modalBackgroundOpacity)
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cancelButton.addTarget(self, action: #selector(close), for: UIControl.Event.touchUpInside)
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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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setUpViewHierarchy()
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}
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private func setUpViewHierarchy() {
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view.addSubview(contentView)
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contentView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: Values.veryLargeSpacing).isActive = true
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view.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: Values.veryLargeSpacing).isActive = true
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verticalCenteringConstraint = contentView.center(.vertical, in: view)
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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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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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verticalCenteringConstraint.constant = contentView.height() / 2 + view.height() / 2
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view.layoutIfNeeded()
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verticalCenteringConstraint.constant = 0
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UIView.animate(withDuration: 0.25) {
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self.view.layoutIfNeeded()
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}
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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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close()
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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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