Implicit property animations do not work with CAReplicatorLayer?

Question

The sample code is here.

After replacing explicit property animations with implicit property animations, the animation is broken.

Explicit animation:

-(void)animate:(id)sender {
    ...
    //Transform Animation
    animation = [CABasicAnimation animationWithKeyPath:@"transform"];
    animation.fromValue = [NSValue valueWithCATransform3D: CATransform3DIdentity];
    animation.toValue = [NSValue valueWithCATransform3D: t];
    animation.duration = 1.0;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeBoth;
    [subLayer addAnimation:animation forKey:@"transform"];

    //Opacity Animation
    animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    animation.fromValue = [NSNumber numberWithFloat:1.0];
    animation.toValue = [NSNumber numberWithFloat:0.0];
    animation.duration = 1.0;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeBoth;
    [subLayer addAnimation:animation forKey:@"opacity"];
    ...
}

-(void)reset:(id)sender {       
    ...
    //Transform Animation
    animation = [CABasicAnimation animationWithKeyPath:@"transform"];
    animation.fromValue = [NSValue valueWithCATransform3D: t];
    animation.toValue = [NSValue valueWithCATransform3D: CATransform3DIdentity];
    animation.duration = 1.0;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeBoth;
    [subLayer addAnimation:animation forKey:@"transform"];

    //Opacity Animation
    animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    animation.fromValue = [NSNumber numberWithFloat:0.0];
    animation.toValue = [NSNumber numberWithFloat:1.0];
    animation.duration = 1.0;
    animation.removedOnCompletion = NO;
    animation.fillMode = kCAFillModeBoth;
    [subLayer addAnimation:animation forKey:@"opacity"];

    ...
}

Implicit animation:

-(void)animate:(id)sender {
    ...
    //Transform Animation
    [CATransaction setAnimationDuration:1];
    subLayer.transform = t;

    //Opacity Animation
    [CATransaction setAnimationDuration:1];
    subLayer.opacity = 0;
    ...
}

-(void)reset:(id)sender {       
    ...
    //Transform Animation
    [CATransaction setAnimationDuration:1];
    subLayer.transform = CATransform3DIdentity;

    //Opacity Animation
    [CATransaction setAnimationDuration:1];
    subLayer.opacity = 1;       
    ...
}

Why?

score 1 · Answer 1 · answered Feb 09 '12 at 15:32

1

u don't need to use CATrasaction when you use implicit animation. be carefull that uikit disables the implicit animation of layer which is a root layer of UIView

answered Feb 09 '12 at 15:32

wihing

541
4
9

[CATransaction begin]; [CATransaction setValue:[NSNumber numberWithFloat:10.0f] forKey:kCATransactionAnimationDuration]; theLayer.zPosition=200.0; theLayer.opacity=0.0; [CATransaction commit]; – wihing Feb 09 '12 at 15:33

score -2 · Answer 2 · edited May 23 '17 at 11:59

-2

You should to set CALayer's delegate to something different that view controllers view at an appropriate time (none of nitWithNibName:bundle:, awakeFromNib, viewDidLoad, and viewWillAppear:animated), look here: Does iPhone OS support implicit animation? .

On my machine calling animate on a touch worked very nicely.

edited May 23 '17 at 11:59

Community

1
1

answered Jul 07 '11 at 12:35

Tomasz Stanczak

12,796
1
30
32

Obviously, I'm using implicit transactions. – an0 Jul 07 '11 at 18:30
Obviously, I was wrong, did find a hint but couldn't test b/c of no OSX at hand. Obviously, you don't know the answer b/c you otherwise wouldn't ask. Now I've researched a bit more and found an answer that worked on my machine. – Tomasz Stanczak Jul 07 '11 at 19:37
BTW CATransaction begin/commit don't make an animation explicit, as long as you won't create an animation and add it to the layer it still is an implicit animation. Obviously, I should add :-) – Tomasz Stanczak Jul 07 '11 at 19:47

Implicit property animations do not work with CAReplicatorLayer?

2 Answers2

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