CODEWITHSUNDEEP
iosswiftcore-animation
Rutger Huijsmans
Rutger Huijsmans

Reputation: 2408

Programming an animation to loop forever in Swift

I'm using a code snippit from the Stack Overflow post: How to make "shaking" animation

I pasted this code into my project and it works perfectly:

func shakeView(){
    var shake:CABasicAnimation = CABasicAnimation(keyPath: "position")
    shake.duration = 0.1
    shake.repeatCount = 2
    shake.autoreverses = true

    var from_point:CGPoint = CGPointMake(LoginField.center.x - 5, LoginField.center.y)
    var from_value:NSValue = NSValue(CGPoint: from_point)

    var to_point:CGPoint = CGPointMake(LoginField.center.x + 5, LoginField.center.y)
    var to_value:NSValue = NSValue(CGPoint: to_point)

    shake.fromValue = from_value
    shake.toValue = to_value
    LoginField.layer.addAnimation(shake, forKey: "position")
}

I however want this animation to loop until another function is called. How do I make it loop indefinite and how can I make it stop when another function is called?

Upvotes: 0

Views: 2218

Answers (2)

luk2302
luk2302

Reputation: 57184

First, set the repeatCount to HUGE_VALF / greatestFiniteMagnitude:

Setting this property to HUGE_VALF will cause the animation to repeat forever.

Second, call LoginField.layer.removeAllAnimations() or LoginField.layer.removeAnimationForKey("position")when you want to stop the animation.

Edit: Apparently Swift does not know HUGE_VALF, setting the repeatCount to Float.infinity should work.

Upvotes: 3

Prasanna Vigneswar
Prasanna Vigneswar

Reputation: 41

Use shake.repeatCount = Float.infinity

Upvotes: 0

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