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    <p>Finally, here is some solution for a three-sleeves animation with simple shadows added. The key to solve this kind of animation is to use several well organized sublayers and also some <code>CATransformLayer</code>.</p> <pre><code>- (void)animate { CATransform3D transform = CATransform3DIdentity; CALayer *topSleeve; CALayer *middleSleeve; CALayer *bottomSleeve; CALayer *topShadow; CALayer *middleShadow; UIView *mainView; CGFloat width = 300; CGFloat height = 150; CALayer *firstJointLayer; CALayer *secondJointLayer; CALayer *perspectiveLayer; mainView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, width, height*3)]; mainView.backgroundColor = [UIColor yellowColor]; [self.view addSubview:mainView]; perspectiveLayer = [CALayer layer]; perspectiveLayer.frame = CGRectMake(0, 0, width, height*2); [mainView.layer addSublayer:perspectiveLayer]; firstJointLayer = [CATransformLayer layer]; firstJointLayer.frame = mainView.bounds; [perspectiveLayer addSublayer:firstJointLayer]; topSleeve = [CALayer layer]; topSleeve.frame = CGRectMake(0, 0, width, height); topSleeve.anchorPoint = CGPointMake(0.5, 0); topSleeve.backgroundColor = [UIColor redColor].CGColor; topSleeve.position = CGPointMake(width/2, 0); [firstJointLayer addSublayer:topSleeve]; topSleeve.masksToBounds = YES; secondJointLayer = [CATransformLayer layer]; secondJointLayer.frame = mainView.bounds; secondJointLayer.frame = CGRectMake(0, 0, width, height*2); secondJointLayer.anchorPoint = CGPointMake(0.5, 0); secondJointLayer.position = CGPointMake(width/2, height); [firstJointLayer addSublayer:secondJointLayer]; middleSleeve = [CALayer layer]; middleSleeve.frame = CGRectMake(0, 0, width, height); middleSleeve.anchorPoint = CGPointMake(0.5, 0); middleSleeve.backgroundColor = [UIColor blueColor].CGColor; middleSleeve.position = CGPointMake(width/2, 0); [secondJointLayer addSublayer:middleSleeve]; middleSleeve.masksToBounds = YES; bottomSleeve = [CALayer layer]; bottomSleeve.frame = CGRectMake(0, height, width, height); bottomSleeve.anchorPoint = CGPointMake(0.5, 0); bottomSleeve.backgroundColor = [UIColor grayColor].CGColor; bottomSleeve.position = CGPointMake(width/2, height); [secondJointLayer addSublayer:bottomSleeve]; firstJointLayer.anchorPoint = CGPointMake(0.5, 0); firstJointLayer.position = CGPointMake(width/2, 0); topShadow = [CALayer layer]; [topSleeve addSublayer:topShadow]; topShadow.frame = topSleeve.bounds; topShadow.backgroundColor = [UIColor blackColor].CGColor; topShadow.opacity = 0; middleShadow = [CALayer layer]; [middleSleeve addSublayer:middleShadow]; middleShadow.frame = middleSleeve.bounds; middleShadow.backgroundColor = [UIColor blackColor].CGColor; middleShadow.opacity = 0; transform.m34 = -1.0/700.0; perspectiveLayer.sublayerTransform = transform; CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:0]]; [animation setToValue:[NSNumber numberWithDouble:-90*M_PI/180]]; [firstJointLayer addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:0]]; [animation setToValue:[NSNumber numberWithDouble:180*M_PI/180]]; [secondJointLayer addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:0]]; [animation setToValue:[NSNumber numberWithDouble:-90*M_PI/180]]; [bottomSleeve addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"bounds.size.height"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:perspectiveLayer.bounds.size.height]]; [animation setToValue:[NSNumber numberWithDouble:0]]; [perspectiveLayer addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"position.y"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:perspectiveLayer.position.y]]; [animation setToValue:[NSNumber numberWithDouble:0]]; [perspectiveLayer addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"opacity"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:0]]; [animation setToValue:[NSNumber numberWithDouble:0.5]]; [topShadow addAnimation:animation forKey:nil]; animation = [CABasicAnimation animationWithKeyPath:@"opacity"]; [animation setDuration:2]; [animation setAutoreverses:YES]; [animation setRepeatCount:INFINITY]; [animation setFromValue:[NSNumber numberWithDouble:0]]; [animation setToValue:[NSNumber numberWithDouble:0.5]]; [middleShadow addAnimation:animation forKey:nil]; } </code></pre>
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    1. CO+1 Wonderful stuff!
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    2. COThank you very much for putting CATransformLayer on my radar. After much gnashing of teeth, I'm finally getting results.
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    3. COhttp://stackoverflow.com/questions/13559243/vertical-fold-animation .. When i tried the same for vertical i am getting reversed view animation.. I have posted the link.. Can you give some help..
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