fade View IN and OUT

问题

Good Morning everyone,

I'm totally confused with this problem.

I have 3 UIWebViews and what should hapen is webView1 fades in (that works) fades out und WebView2 fades in......

I made it so far with:

CATransition *Animation = [CATransition animation];
[Animation setDuration:4.0];
[Animation setType:kCATransitionFade];
[Animation setSubtype:kCATransitionFade];
[Animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];


transitioning = YES;

if (transitioning) {
    [self.webView1.layer addAnimation:Animation forKey:nil];
    self.webView1.hidden = YES;
    self.webView2.hidden = NO;

can anyone help me with that?

And when it fades in the webView fades from white even the background color is set to an other color! can't I effect the color?

回答1:

You should use UIView implicit animations. For instance, a cross fade from webView1 to webView2:

[UIView beginAnimations:@"fade" context:nil];
self.webView1.alpha = 0.0;
self.webView2.alpha = 1.0;
[UIView commitAnimations];

If you wanna execute some code after the animation finished, insert this between begin and commit:

[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(fadeAnimationDidStop:finished:context:)];

and create the didStop method with the signature

- (void)fadeAnimationDidStop:(NSString*)animationID finished:(NSNumber*)finished context:(void*)context`

回答2:

transition.type =kCATransitionMoveIn;
transition.subtype =kCATransitionFade;

来源：https://stackoverflow.com/questions/4386038/fade-view-in-and-out