CODEWITHSUNDEEP
swiftfunctioncocoa-touch
Alex Bailey
Alex Bailey

Reputation: 793

Swift: How to terminate a function outside the execution of the function

I'm fairly new to Swift still. I'm wondering how I can terminate an animation function in swift outside the execution of the function. In the case below I run an animation for 15 seconds but anytime a user presses a certain button I want the animation to stop and the elements to disappear. Any thoughts on the best way to go about this? Here is the function. 

func createTimerAnimation () {
    // create timer line shapes

    guard self.timerisActive else {

        print("in guard 1")
        return
    }

    let screenWidth = (self.view.bounds.width)
    let screenHeight = (self.view.bounds.height)

    let timerShapeLeft = drawTimerShape()
    let timerShapeRight = drawTimerShape()
    let timerShapeCenter = drawTimerShape()

    view.addSubview(timerShapeLeft)
    view.addSubview(timerShapeRight)
    view.addSubview(timerShapeCenter)

UIView.animate(withDuration: 14.5, delay: 0.0, options: [.curveEaseOut], animations:{
            timerShapeLeft.frame = CGRect (x: (screenWidth / 2), y: (screenHeight - 60), width: timerShapeLeft.frame.width, height: (timerShapeLeft.frame.height - 30))
            timerShapeRight.frame = CGRect (x: (screenWidth / 2), y: (screenHeight - 60), width: timerShapeRight.frame.width, height: (timerShapeRight.frame.height - 30))
            timerShapeCenter.frame = CGRect (x: (screenWidth / 2), y: (screenHeight - 60), width: timerShapeCenter.frame.width, height: (timerShapeCenter.frame.height))
            timerShapeLeft.alpha = 1.0
            timerShapeRight.alpha = 1.0
            timerShapeCenter.alpha = 0.4
            timerShapeLeft.tintColor = self.hexGray
            timerShapeRight.tintColor = self.hexGray

            guard self.timerisActive else {

                print("in guard 1")
                return
            }

Upvotes: 0

Views: 117

Answers (1)

Josh Homann
Josh Homann

Reputation: 16327

Animations are actually handled by the view's layer so you can cancel them there with CALayer.removeAllAnimations() :

view.layer.removeAllAnimations()

Upvotes: 2

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