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fixes "shake to undo" gesture bug. #64

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fixes "shake to undo" gesture bug. #64

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16 changes: 15 additions & 1 deletion Sources/KeyboardAvoiding.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ import UIKit
private static var avoidingViewUsesAutoLayout = false
private static var triggerViews = [UIView]()
private static var showingAnimationCount = 0
private static var waitForAnimation: (isWaiting: Bool, notification: Notification?) = (false, nil)

public private(set) static var isKeyboardVisible = false
public static var buffer: CGFloat = 0.0
Expand Down Expand Up @@ -222,6 +223,7 @@ import UIKit
}
self.avoidingView!.superview!.setNeedsUpdateConstraints()
}
waitForAnimation.isWaiting = true
UIView.animate(withDuration: TimeInterval(animationDuration + CGFloat(0.075)), delay: 0, options: UIView.AnimationOptions(rawValue: UInt(animationOptions)), animations: {() -> Void in
if self.avoidingViewUsesAutoLayout {
self.avoidingView!.superview!.layoutIfNeeded()
Expand All @@ -233,6 +235,12 @@ import UIKit
if self.showingAnimationCount <= 0 {
self.updatedConstraints.removeAll()
self.updatedConstraintConstants.removeAll()
// All animations are done, perform queued keyboard events if any are present
waitForAnimation.isWaiting = false
if let notification = waitForAnimation.1 {
waitForAnimation.notification = nil
self.didChange(notification)
}
}
})
}
Expand Down Expand Up @@ -291,7 +299,13 @@ import UIKit
UIApplication.shared.windows.first?.rootViewController?.view.endEditing(true)
})
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillChangeFrameNotification, object: nil, queue: OperationQueue.main, using: { notification in
self.didChange(notification)
// If avoiding view is still in animation from previous keyboard events it cannot be changed right now
// Store notification so it can be fire again, when all animations are finished
if !waitForAnimation.isWaiting {
self.didChange(notification)
} else {
waitForAnimation.notification = notification
}
})
}
}
Expand Down