Perform a task (in iOS) after animation has finished

Question

So I have this line of code:

[tableView setContentOffset:point animated:YES];

and I want to run another piece of code after the animation ends. My a

Answer 1

For a scrollView, tableView or collectionView if you do something like this:

[self.collectionView setContentOffset:CGPointMake(self.collectionView.contentOffset.x+260.0,
                                                      self.collectionView.contentOffset.y)
                                 animated:YES];

then you'll get back a:

-(void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView

when the scroll finishes.

You do NOT get this callback if the user moves the view.

Answer 2

Try to use this method:

[UIView animateWithDuration:0.6f
                      delay:0.0f
                    options:UIViewAnimationOptionCurveEaseOut
                 animations:^{
                     // Do your animations here.
                 }
                 completion:^(BOOL finished){
                     if (finished) {
                         // Do your method here after your animation.
                     }
                 }];

Answer 3

You can create animations and tell them directly to perform a block after they're done.

Here's an alternative that may play nicer with the UITableView's animations.

[UIView beginAnimations:nil context:sender];
[UIView setDelegate:self];
[UIView setDidStopSelector:@selector(scrollMethod:)];
[tableView setContentOffset:point];
[UIView commitAnimations];

And make sure to implement your scrollMethod: with this signature:

- (void)scrollMethod:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context

You can use the context to know which sender you have. Read the UIView docs for more on UIView animations.

Answer 4

UITableView inherits setContentOffset:animated: from its superclass, UIScrollView. Check out the scrollViewDidEndScrollingAnimation: method of UIScrollViewDelegate.