I am currently performing image crossfades using the following method:
*
- (void)crossFadeMainImage:(UIImage *)image1 toImage:(UIImage *)image2 {
CABasicAnimation *crossFade = [CABasicAnimation animationWithKeyPath:@
"contents"];
crossFade.duration = 0.5;
crossFade.delegate = self;
crossFade.fromValue = (id)image1.CGImage;
crossFade.toValue = (id)image2.CGImage;
[self.mainImage.layer addAnimation:crossFade forKey:@"animateContents"];
self.mainImage.image = image2;
}
*
It works wonderfully, however the performance to begin the fade takes a
little while (under a second but it's not instant). The UIImageView is
nearly full screen on an iPad & the images are larger than that because the
UIImageView is within a UIScrollView that allows zooming and panning (want
to keep the image quality up when zoomed in).
Is there something that could be done to make this happen a little quicker?
I am using ARC.
Thanks,
Eric
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