Question

I know you can perform a two-stage animataion using blocks like so:

[UIView animateWithDuration:25.0 delay:0.0 options:UIViewAnimationCurveLinear animations:
     ^{ 
         aView.alpha = 2.5;         
     } 
         completion:^(BOOL finished)
     {
         aView.hidden = YES; 
     }
 ];

..but how would I create a multistage (more than 2) animation using blocks?

Answer 1

Use nested animations:

[UIView animateWithDuration:0.5 
                      delay:0.0 
                    options:UIViewAnimationOptionBeginFromCurrentState 
                 animations:^{
                     //first animation
                 }
                 completion:^(BOOL finished){[UIView animateWithDuration:0.5 
                                                                   delay:0.0 
                                                                 options:UIViewAnimationOptionBeginFromCurrentState 
                                                              animations:^{
                                                                  //second animation
                                                              }
                                                              completion:^(BOOL finished){//and so on..
                                                              }];}];