combine multiple CAAnimation sequentially - serialization

Question

I was reading about CATransactions and then thought this might help solve my problem.
This is what I wan't to do:
I have 3 animations in the same layer, which all have their own duration. I create the animations using CAKeyframeAnimation with a CGMutablePathRef.
say for example:
anim1 -> duration 5s
anim2 -> 3s
anim3 -> 10s
Now I want to serialize them sequentially. I tried to use CAAnimationGroup but the animations run concurrently.
I read about CATransaction, is it a possible solution? Can you give me a little example?
thanks for help !

Answer 1

If by serialization you mean starting each animation after the previous one has finished, use the beginTime property (defined in CAMediaTiming protocol). Note that its documentation is a little misleading. Here's an example:
anim2.beginTime = anim1.beginTime + anim1.duration;
anim3.beginTime = anim2.beginTime + anim2.duration;

Answer 2

If You are sure to do this thing with Layers then you may try like following
Using Completion Block in CATransactions
-(void)animateThreeAnimationsOnLayer:(CALayer*)layer animation:(CABasicAnimation*)firstOne animation:(CABasicAnimation*)secondOne animation:(CABasicAnimation*)thirdOne{
[CATransaction begin];
[CATransaction setCompletionBlock:^{
[CATransaction begin];
[CATransaction setCompletionBlock:^{
[CATransaction begin];
[CATransaction setCompletionBlock:^{
//If any thing on completion of all animations
}];
[layer addAnimation:thirdOne forKey:#"thirdAnimation"];
[CATransaction commit];
}];
[layer addAnimation:secondOne forKey:#"secondAnimation"];
[CATransaction commit];
}];
[layer addAnimation:firstOne forKey:#"firstAnimation"];
[CATransaction commit];
}
Another way is by applying delay to begin animation.
-(void)animateThreeAnimation:(CALayer*)layer animation:(CABasicAnimation*)firstOne animation:(CABasicAnimation*)secondOne animation:(CABasicAnimation*)thirdOne{
firstOne.beginTime=0.0;
secondOne.beginTime=firstOne.duration;
thirdOne.beginTime=firstOne.duration+secondOne.duration;
[layer addAnimation:firstOne forKey:#"firstAnim"];
[layer addAnimation:secondOne forKey:#"secondAnim"];
[layer addAnimation:thirdOne forKey:#"thirdAnim"];
}
And if You are going to use UIVIew Animation
//if View is applicable in your requirement then you can look this one;
-(void)animateThreeAnimationOnView{
[UIView animateWithDuration:2.0 animations:^{
//first Animation
} completion:^(BOOL finished) {
[UIView animateWithDuration:2.0 animations:^{
//Second Animation
} completion:^(BOOL finished) {
[UIView animateWithDuration:2.0 animations:^{
//Third Animation
}];
}];
}];
}