Question

I have this code:
successview is my view and it start with alpha 0.00 but when it finish the animation with autoreverse, successview become with alpha 1.00…why?

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:2];
[UIView setAnimationRepeatAutoreverses:YES];
[successView setAlpha:1.00];
[UIView commitAnimations];

Answer 1

One approach is to do two different animations: One that progresses towards an alpha value of 1.0 and then another that goes from 1.0 back to 0.

Use the animateWithDuration:animations:completion: method of the UIView to accomplish this. You can do the reverse in the completion block.

Something along the lines of:

[UIView animateWithDuration:0.2
     animations:^{view.alpha = 1.0;}
     completion:^(BOOL finished){ 

        [UIView animateWithDuration:0.2
                         animations:^{view.alpha = 0;}];

     }];

See UIView documentation for more details on animations.