uianimation

I have an animation I'm using to snap a rotatable UIView to a circular grid. As the view animates, I need to update another view based on the rotating views position. How can I go about getting the position of the rotating view as it animates into position? When animation starts you can start a function that will be polling current view position using a timer (I suppose you will need to get presentationLayer from view's layer and get position values from it). There's no callbacks for CAAnimation other than animationDidStart and animationDidStop so it seems that's the solution (if I'm not

I followed the tutorial over @ http://www.appcoda.com/uipageviewcontroller-storyboard-tutorial/ to implement a UIPageViewController. I need to make the transition between view controllers to fade in/out when the user scrolls between them. An example of an app that does this is over here https://itunes.apple.com/us/app/tapiture/id645402534?mt=8 Use the delegate pageViewController:willTransitionToViewControllers: . This is called as the gesture begins. You know what the old view controller is because it's already there. You know what the new view controller is because this message tells you.

i have 5 animating image in a image view and will like to allow user to tap on them base on the default ID and push it to another view. i tried to add in gesture tap but the imageview are not detecting. can anybody give me some advise ? EDIT: end up i did not use it, i set a UIButton instead. thank you :) viewDidLoad self.defaultID = [[NSMutableArray alloc] initWithObjects:@"7",@"9",@"11",@"27",@"6",nil]; self.defaultImageCaption = [[NSMutableArray alloc] initWithObjects:@"Ver",@"Green",@"Red",@"CF",@"Dwarf",nil]; //default image imageViewTop.alpha = 1.0; imageViewBottom.alpha = 0.0;

This is my animation method (PreloaderView.swift) public func performAction(action: PreloaderAction) { let highOpacity = CABasicAnimation.init(keyPath: "opacity") let middleOpacity = CABasicAnimation.init(keyPath: "opacity") let lowOpacity = CABasicAnimation.init(keyPath: "opacity") if action == .PreloaderActionNone { self.thirdShape.removeAllAnimations() self.firstShape.opacity = 0.3; self.secondShape.opacity = 0.5 self.thirdShape.opacity = 1.0 } else if action == .PreloaderActionFailure { UIView.animateWithDuration(2, animations: { self.thirdShape.strokeColor = UIColor.redColor().CGColor })

I have problems with transitionWithView and animateWithDuration . One of my animateWithDuration blocks doesn't transition, it is a sudden change, and transitionWithView does not temporarily disable user interaction. I have checked the docs and believe I am doing everything correctly, but obviously something is wrong. Here are the two blocks of code: This is in my main View Controller ViewController which has three container views/child view controllers. This block moves one of the container views, but does not block the user from other interactions in ViewController while the transition is

A UIView needs to change a warning label depending on the completion handler of a custom control: voucherInputView.completionHandler = {[weak self] (success: Bool) -> Void in self?.proceedButton.enabled = success self?.warningLabel.alpha = 1.0 if success { self?.warningLabel.text = "Code you entered is correct" self?.warningLabel.backgroundColor = UIColor.greenColor() } else { self?.warningLabel.text = "Code you entered is incorrect" self?.warningLabel.backgroundColor = UIColor.orangeColor() } UIView.animateWithDuration(NSTimeInterval(1.0), animations:{ ()-> Void in self?.warningLabel.alpha =