Sequenced animations with blocks

Shake (bad password) Animation With Blocks

#import "UIView+ShakeAnimationAdditions.h"
#import "AnimationSequencer.h"

@implementation UIView (ShakeAnimationAdditions)

-(void) performShakeAnimation
{
	AnimationSequencer *sequencer = [AnimationSequencer sequencer];
	sequencer.interAnimationInterval = 0.0;
	sequencer.sequenceDuration = 0.05;
	
	const CGPoint originalCenter = self.center;
	const CGFloat kOffset = 60;
	
	// 1/2 to right
	[sequencer addAnimationBlock:^(id object) 
	 {
		 self.center = CGPointMake(self.center.x + (kOffset / 2.0), self.center.y);
	 }];
	
	// back and forth 3 times
	const NSInteger kShakeCount = 3;
	for( NSInteger index=0; index<kShakeCount; index++ )
	{
		[sequencer addAnimationBlock:^(id object) 
		 {
			 self.center = CGPointMake( originalCenter.x - kOffset, originalCenter.y);
		 }];
		[sequencer addAnimationBlock:^(id object)
		 {
			 self.center = CGPointMake( originalCenter.x + kOffset,  originalCenter.y);
		 }];
	}
	
	// back to the left (original center)
	[sequencer addAnimationBlock:^(id object) 
	 {
		 self.center = originalCenter;
	 }];
	[sequencer start];
}


@end