I have a function which switches between UICollectionView:
func toggleCollectionView(target: NSObject, targetName:String){
self.view.userInteractionEnabled = false
if let tempTarget = target as? UICollectionView {
//if selected item is same as active one, won't do anything
if(targetName != activeToolbarName){
tempTarget.hidden = false
tempTarget.frame.origin.y = screenSize.height
UIView.animateWithDuration(0.4, delay: 0.0, options: .CurveEaseOut, animations: {
if let tempActiveToolbar = self.activeToolbar as? UICollectionView {
tempActiveToolbar.frame.origin.y = self.screenSize.height
}
tempTarget.frame.origin.y = self.screenSize.height - tempTarget.frame.height - self.selectorsContainer.frame.height
}, completion: { finished in
if let tempActiveToolbar = self.activeToolbar as? UICollectionView {
tempActiveToolbar.hidden = true
self.activeToolbar = target
self.activeToolbarName = targetName
self.view.userInteractionEnabled = true
}
})
}
}
}
It’s triggered by several button on the screen like this:
@IBAction func showFontsTool(sender: UIBarButtonItem) {
toggleCollectionView(fontsCV, targetName:"fontsCV")
}
If user tap on buttons very fast, completion block won’t be called sometimes and self.view.userInteractionEnabled won’t be enabled. How can I make sure completion block will be called always after starting animation?
Source: ios
