Fade/dissolve when changing UIImageView's image?

Yes what you say is absolutely correct and thats the way to do it. I wrote this method & always use this to Fade in my image. I deal with CALayer for this.

You need to import Core Animation for this (void)fadeInLayer:(CALayer *)l { CABasicAnimation *fadeInAnimate = CABasicAnimation animationWithKeyPath:@"opacity"; fadeInAnimate. Duration = 0.5; fadeInAnimate. RepeatCount = 1; fadeInAnimate.

Autoreverses = NO; fadeInAnimate. FromValue = NSNumber numberWithFloat:0.0; fadeInAnimate. ToValue = NSNumber numberWithFloat:1.0; fadeInAnimate.

RemovedOnCompletion = YES; l addAnimation:fadeInAnimate forKey:@"animateOpacity"; return; } You could do the opposite for Fade out an image. After it fades out. You just remove it from superview (which is UIImageView ) imageView removeFromSuperview.

Yes what you say is absolutely correct and thats the way to do it. I wrote this method & always use this to Fade in my image. I deal with CALayer for this.

You need to import Core Animation for this. + (void)fadeInLayer:(CALayer *)l { CABasicAnimation *fadeInAnimate = CABasicAnimation animationWithKeyPath:@"opacity"; fadeInAnimate. Duration = 0.5; fadeInAnimate.

RepeatCount = 1; fadeInAnimate. Autoreverses = NO; fadeInAnimate. FromValue = NSNumber numberWithFloat:0.0; fadeInAnimate.

ToValue = NSNumber numberWithFloat:1.0; fadeInAnimate. RemovedOnCompletion = YES; l addAnimation:fadeInAnimate forKey:@"animateOpacity"; return; } You could do the opposite for Fade out an image. After it fades out.

You just remove it from superview (which is UIImageView). ImageView removeFromSuperview.

Another way to do this is by using predefined CAAnimation transitions: CATransition *transition = CATransition animation; transition. Duration = 0.25; transition. TimingFunction = CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut; transition.

Type = kCATransitionFade; transition. Delegate = self; self.view. Layer addAnimation:transition forKey:nil; view1.

See the View Transitions example project from Apple: http://developer.apple.com/library/ios/#samplecode/ViewTransitions/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007411.

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