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?
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.. }];}]; 
Using a completion handler is the primary way that you link multiple animations. They've exampled in Listing 4-2 in their documentation. If you put the nested block in the first block, it'll essentially start simultaneously with the first block, rather than when the animations of the first block have ended.or you can make a recursive, multi-stage animation method:
-(void) multiStageAnimate{ [UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{ //animation code } completion:^(BOOL finished){ if(/* If terminating condition not met*/) [self multiStageAnimate]; }]; } I realize this is an older question, but I thought I'd add my input.
I created a class for handling multistage animation, available here!
It only supports a single duration and option set currently, but I'll probably add more features.
Here's how you use it:
// Create New Animation MSAnimation * newAnimation = [MSAnimation newAnimationWithDuration:0.35 andOptions:UIViewAnimationOptionCurveEaseInOut]; // Add Sequence [newAnimation addNewAnimationStage:^{ greenView.center = CGPointMake(greenView.center.x, greenView.center.y + 100); }]; [newAnimation addNewAnimationStage:^{ greenView.center = CGPointMake(greenView.center.x + 100, greenView.center.y); }]; [newAnimation addNewAnimationStage:^{ greenView.center = CGPointMake(greenView.center.x, greenView.center.y + 100); }]; [newAnimation addNewAnimationStage:^{ greenView.center = CGPointMake(greenView.center.x - 50, greenView.center.y); }]; [newAnimation addNewAnimationStage:^{ greenView.frame = CGRectMake(0, 0, 100, 100); }]; // Animate Your Sequence With Completion [newAnimation animateSequenceWithCompletion:^{ NSLog(@"All finished!"); }]; Gives you:
