How to cancel previous animation when a new one is triggered? How to cancel previous animation when a new one is triggered? ios ios

How to cancel previous animation when a new one is triggered?

You can user method removeAllAnimations to stop animation
Replace your code with below = sender.locationInView(self.cameraWrapper)self.focusView.transform = CGAffineTransformMakeScale(2, 2)self.focusView.hidden = falseself.focusView.layer.removeAllAnimations() // <<====  SolutionUIView.animateWithDuration(0.5, animations: { [unowned self] () -> Void in    self.focusView.transform = CGAffineTransformIdentity}, completion: { (finished) -> Void in    UIView.animateWithDuration(0.5, delay: 1.0, options: nil, animations: { () -> Void in        self.focusView.alpha = 0.0    }, completion: { (finished) -> Void in            self.focusView.hidden = true            self.focusView.alpha = 1.0    })})

Reference : link
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@Jageen solution is great, but I worked with UIStackView animation and there I needed additional steps. I have stackView with view1 and view2 inside, and one view should be visible and one hidden:

public func configureStackView(hideView1: Bool, hideView2: Bool) {    let oldHideView1 = view1.isHidden    let oldHideView2 = view2.isHidden    view1.layer.removeAllAnimations()    view2.layer.removeAllAnimations()    view.layer.removeAllAnimations()    stackView.layer.removeAllAnimations()    // after stopping animation the values are unpredictable, so set values to old    view1.isHidden = oldHideView1 //    <- Solution is here    view2.isHidden = oldHideView2 //    <- Solution is here    UIView.animate(withDuration: 0.3,                   delay: 0.0,                   usingSpringWithDamping: 0.9,                   initialSpringVelocity: 1,                   options: [],                   animations: {                    view1.isHidden = hideView1                    view2.isHidden = hideView2                    stackView.layoutIfNeeded()    },                   completion: nil)}

In my case, I add the focusing indicator by using addSubview().


square is the UIView I defined in the function. So when the user tap the screen to focus, this function will add a square on subview. And to cancel this animation when the next tap happen, I just simply use the removeFromSuperview() function, when this function called it removes the view from its superview which is the focusing square here.

filterView.subviews.forEach({ $0.removeFromSuperview() })

It's different from the method above to remove the animation, but remove the subview directly.