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animate in/out

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This commit is contained in:
Michael Kirk 2018-07-11 10:53:02 -06:00
parent ceeddbc67b
commit bb6722ea42
1 changed files with 57 additions and 3 deletions
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60
SignalMessaging/ViewControllers/MessageActionsViewController.swift
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@ -67,21 +67,53 @@ class MessageActionsViewController: UIViewController {
fatalError("init(coder:) has not been implemented")
}
var actionSheetViewVerticalConstraint: NSLayoutConstraint?
override func loadView() {
self.view = UIView()
view.backgroundColor = UIColor.black.withAlphaComponent(0.4)
highlightFocusedView()
view.addSubview(actionSheetView)
actionSheetView.autoPinEdgesToSuperviewEdges(with: .zero, excludingEdge: .top)
actionSheetView.autoPinWidthToSuperview()
actionSheetView.setContentHuggingVerticalHigh()
actionSheetView.setCompressionResistanceHigh()
self.actionSheetViewVerticalConstraint = actionSheetView.autoPinEdge(.top, to: .bottom, of: self.view)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(didTapBackground))
self.view.addGestureRecognizer(tapGesture)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
// TODO first time only?
guard let actionSheetViewVerticalConstraint = self.actionSheetViewVerticalConstraint else {
owsFail("\(self.logTag) in \(#function) actionSheetViewVerticalConstraint was unexpectedly nil")
return
}
// darken background
let backgroundDuration: TimeInterval = 0.1
UIView.animate(withDuration: backgroundDuration) {
self.view.backgroundColor = UIColor.black.withAlphaComponent(0.4)
}
// present action sheet
self.actionSheetView.superview?.layoutIfNeeded()
NSLayoutConstraint.deactivate([actionSheetViewVerticalConstraint])
self.actionSheetViewVerticalConstraint = self.actionSheetView.autoPinEdge(toSuperviewEdge: .bottom)
UIView.animate(withDuration: 0.3,
delay: backgroundDuration,
options: .curveEaseOut,
animations: {
self.actionSheetView.superview?.layoutIfNeeded()
},
completion: nil)
}
private func highlightFocusedView() {
guard let snapshotView = self.focusedView.snapshotView(afterScreenUpdates: false) else {
owsFail("\(self.logTag) in \(#function) snapshotView was unexpectedly nil")
@ -100,7 +132,29 @@ class MessageActionsViewController: UIViewController {
@objc
func didTapBackground() {
self.delegate?.messageActionsDidHide(self)
animateDismiss()
}
func animateDismiss() {
self.actionSheetView.superview?.layoutIfNeeded()
if let actionSheetViewVerticalConstraint = self.actionSheetViewVerticalConstraint {
NSLayoutConstraint.deactivate([actionSheetViewVerticalConstraint])
} else {
owsFail("\(self.logTag) in \(#function) actionSheetVerticalConstraint was unexpectedly nil")
}
self.actionSheetViewVerticalConstraint = self.actionSheetView.autoPinEdge(.top, to: .bottom, of: self.view)
UIView.animate(withDuration: 0.2,
delay: 0,
options: .curveEaseOut,
animations: {
self.view.backgroundColor = UIColor.clear
self.actionSheetView.superview?.layoutIfNeeded()
},
completion: { _ in
self.delegate?.messageActionsDidHide(self)
})
}
}