How to delay a CABasicAnimation?

Question

I have a CABasicAnimation and want to start it after a delay. In UIKit I can specify delays. The CAMediaTiming protocol has a timeOffset property but I can't see an effect. My next try is to use GCD to delay it but it feels like overkill.

I would just use GCD. ` dispatch_after(popTime, dispatch_get_main_queue(), ^(void){ <#code to be executed on the main queue after delay#> });` — BooRanger, Feb 27 '13 at 16:22
[This answer](http://stackoverflow.com/a/11625742/608157) should answer your question — David Rönnqvist, Feb 27 '13 at 16:36

score 160 · Accepted Answer · edited May 18 '19 at 06:52

160

Shouldn't you be using the [CAMediaTiming beginTime] property (reference)?

See Customizing the Timing of an Animation in the Core Animation Programming Guide.

CABasicAnimation *animation;
animation.beginTime = CACurrentMediaTime() + 0.3; //0.3 seconds delay

edited May 18 '19 at 06:52

Cœur

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answered Feb 27 '13 at 16:21

trojanfoe

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Just remember that it is `CACurrentMediaTime() + yourDelay` – David Rönnqvist Feb 27 '13 at 17:01
2

I am not able to use this for AVVideoCompositionCoreAnimationTool. The only thing which works is AVCoreAnimationBeginTimeAtZero. I want some delay for my animation... – nr5 Nov 13 '14 at 05:24
add a fake "do nothing type" animation for that delay time. – nr5 Jun 25 '15 at 07:41

score 22 · Answer 2 · answered Nov 16 '16 at 00:23

In Swift 3.0:

func animateYourView () {
   let myDelay = 5.0
   let scalePulseAnimation: CABasicAnimation = CABasicAnimation(keyPath: "transform.scale")
   scalePulseAnimation.beginTime = CACurrentMediaTime() + myDelay
   scalePulseAnimation.duration = 0.5
   scalePulseAnimation.repeatCount = 2.0
   scalePulseAnimation.autoreverses = true
   scalePulseAnimation.fromValue = 1.0
   scalePulseAnimation.toValue = 0.5
   myView.layer.add(scalePulseAnimation, forKey: "scale")
}

Where the key line for the delay is:

  scalePulseAnimation.beginTime = CACurrentMediaTime() + myDelay

How to delay a CABasicAnimation?

2 Answers2