How to nest multiple CA animations?

Question

How to nest multiple CA animation like UIView animateWithDuration does? For example, I need to animate 6 animations where each next animation goes after previous one. So, with UIView animateWithDuration, every next animation is called from complete block. Does CA allows to use blocks and etc.? If no then how to perform nested sequential animations?

omz · Accepted Answer · 2011-08-16 18:31:25Z

1

CAAnimation doesn't have a block-based API, but you could use its delegate method animationDidStop:finished: to chain multiple animations.

If you do this a lot, you may want to write your own block-based wrapper for this.

answered Aug 16, 2011 at 18:31

omz

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2 Comments

Centurion Over a year ago

Not quite so tough for writing my own wrapper at this moment :) One question about using delegate: implementing animationDidStop:finished: delegate method will trigger it for all on-screen going animations (including UIView animations) or only CA animations?

omz Over a year ago

Only for the animations for which you set yourself as the delegate.

Mr. Berna · Accepted Answer · 2011-08-16 18:37:43Z

Alternatively to omz's answer, you can set up NSTimer objects to start the successive parts of the animation.

[NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(legOne:) userInfo:nil repeats:NO]; [NSTimer scheduledTimerWithTimeInterval:4.0 target:self selector:@selector(legTwo:) userInfo:nil repeats:NO];

Where legOne: is a method that does the first part of the animation, etc.

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