How can i change view after an animation? - ios

Question

I need your help.
In my app i press a button and an animation starts. After this animation i want to change automatically view without pressing any other button.
How can i do?
Here my code, i think i'm in the correct way, but the animation doesn't start, changes only view and xcode doesn't give me an error message.
- (IBAction)button {
[UIView animateWithDuration:2.5f animations:^{
NSArray *playAnimation;
playAnimation= [[NSArray alloc] initWithObjects:
[UIImage imageNamed:#“image1.png"],
[UIImage imageNamed:#“image2.png"],
[UIImage imageNamed:#"image3.png"],
[UIImage imageNamed:#"image4.png"],
[UIImage imageNamed:#"image5.png"],
[UIImage imageNamed:#"image6.png"],
[UIImage imageNamed:#"image7.png"],
Nil];
}
completion:^(BOOL finished) {
UIStoryboard *Scene1 = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
UIViewController *Sc1 = [Scene1 instantiateViewControllerWithIdentifier:#"ViewController"];
[self presentViewController:Sc1 animated:NO completion:nil];
}];
}
Many thanks for your help

Answer 1

Most of the animate* methods have sibling-forms that take a completion block. Use the completion to do whatever you'd like.
e.g.
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations;
-- versus --
+ (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion

Answer 2

Depends on how you started the animation. Read up on chaining UIView animations for a good overview of the subject.
If you're using UIView animation, set your animation delegate and an animationDidStopSelector, e.g.:
[UIView beginAnimations:#"Grow" context:self.btn];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:0.5f];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:#selector(doneAnimating:finished:context:)];
// Do stuff you want animated
[UIView commitAnimations];
If you're using CABasicAnimation, same thing, just a different interface - set the delegate and animationDidStop selector, e.g.:
CABasicAnimation* anim = [CABasicAnimation animationWithKeyPath:#"transform.scale.y"];
anim.delegate = self;
anim.animationDidStop = #selector(doneAnimating:finished:context:)];
anim.fromValue = [NSNumber numberWithDouble:0.01];
anim.toValue = [NSNumber numberWithDouble:1.0];
anim.duration = 0.5f;
[layer addAnimation:anim forKey:#"grow"];
In either case, -doneAnimating will get called when the animation has finished:
-(void)doneAnimating:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
// Do whatever you want next
}

Answer 3

You can do basic UIView animations. These include completion blocks in which you can push/present views.
[UIView animateWithDuration:1.5f animations:^{
// Perform animation here.
// ex.
[label setFrame:CGRectMake(0, 0, 320, 50)];
} completion:^(BOOL finished) {
// Show new view.
[self.navigationController pushViewController:[[UIViewController alloc] init] animated:YES];
}];