152 lines
3.9 KiB
Swift
152 lines
3.9 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 ToastController: NSObject, ToastViewDelegate {
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static var currentToastController: ToastController?
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private let toastView: ToastView
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private var isDismissing: Bool
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// MARK: Initializers
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@objc
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required public init(text: String) {
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toastView = ToastView()
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toastView.text = text
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isDismissing = false
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super.init()
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toastView.delegate = self
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}
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// MARK: Public
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@objc
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public func presentToastView(fromBottomOfView view: UIView, inset: CGFloat) {
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Logger.debug("")
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toastView.alpha = 0
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view.addSubview(toastView)
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toastView.setCompressionResistanceHigh()
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toastView.autoPinEdge(.bottom, to: .bottom, of: view, withOffset: -inset)
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toastView.autoPinWidthToSuperview(withMargin: 24)
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if let currentToastController = type(of: self).currentToastController {
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currentToastController.dismissToastView()
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type(of: self).currentToastController = nil
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}
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type(of: self).currentToastController = self
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UIView.animate(withDuration: 0.1) {
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self.toastView.alpha = 1
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}
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DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 1.5) {
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// intentional strong reference to self.
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// As with an AlertController, the caller likely expects toast to
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// be presented and dismissed without maintaining a strong reference to ToastController
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self.dismissToastView()
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}
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}
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// MARK: ToastViewDelegate
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func didTapToastView(_ toastView: ToastView) {
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Logger.debug("")
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self.dismissToastView()
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}
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func didSwipeToastView(_ toastView: ToastView) {
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Logger.debug("")
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self.dismissToastView()
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}
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// MARK: Internal
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func dismissToastView() {
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Logger.debug("")
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guard !isDismissing else {
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return
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}
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isDismissing = true
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if type(of: self).currentToastController == self {
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type(of: self).currentToastController = nil
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}
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UIView.animate(withDuration: 0.1,
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animations: {
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self.toastView.alpha = 0
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},
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completion: { (_) in
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self.toastView.removeFromSuperview()
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})
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}
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}
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protocol ToastViewDelegate: class {
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func didTapToastView(_ toastView: ToastView)
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func didSwipeToastView(_ toastView: ToastView)
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}
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class ToastView: UIView {
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var text: String? {
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get {
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return label.text
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}
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set {
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label.text = newValue
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}
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}
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weak var delegate: ToastViewDelegate?
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private let label: UILabel
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// MARK: Initializers
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override init(frame: CGRect) {
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label = UILabel()
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super.init(frame: frame)
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self.layer.cornerRadius = 4
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self.backgroundColor = Theme.toastBackgroundColor
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self.layoutMargins = UIEdgeInsets(top: 8, left: 8, bottom: 8, right: 8)
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label.textAlignment = .center
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label.textColor = Theme.toastForegroundColor
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label.font = UIFont.ows_dynamicTypeBody
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label.numberOfLines = 0
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self.addSubview(label)
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label.autoPinEdgesToSuperviewMargins()
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let tapGesture = UITapGestureRecognizer(target: self, action: #selector(didTap(gesture:)))
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self.addGestureRecognizer(tapGesture)
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let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(didSwipe(gesture:)))
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self.addGestureRecognizer(swipeGesture)
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}
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required init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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// MARK: Gestures
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@objc
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func didTap(gesture: UITapGestureRecognizer) {
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self.delegate?.didTapToastView(self)
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}
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@objc
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func didSwipe(gesture: UISwipeGestureRecognizer) {
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self.delegate?.didSwipeToastView(self)
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}
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}
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