calling an animation?

Question

I have placed the following code in my program

CATransition *animation = [CATransition animation];  
[animation setDuration:0.5];  
[animation setType:kCATransitionFade];  
[animation setSubtype:kCATransitionFromLeft];  
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];  
   [[theWindow layer] addAnimation:animation forKey:@"SwitchToView1"];  

Everything works great but there is no animation when I build the project into the simulator.

Where and how do I call this animation? once I get this then I can submit it to the app store!

Answer 1

Do you have any views in your app or just a Window? I'm just wondering if you're adding the animation beneath everything else. In most of my apps and many of Apple's samples, there is an underlying MainWindow and all views are added up on top of that using ViewControllers or other controllers.

Also, have you thought about using the much simpler beginAnimation...commitAnimation?

If you're merely trying to animate the addition of a view and deletion of another, see my code for doing this with viewControllers:

- (void)switchTwoViews:(UIViewController *)view1 otherView:(UIViewController *)view2 cacheTheView:(BOOL) cache;
{
    /*
     This method is called when the info or Done button is pressed.
     It flips the displayed view from the main view to the flipside view and vice-versa.
     */

    UIViewController *coming = nil;
    UIViewController *going = nil;
    UIViewAnimationTransition transition;

    [view1.view setUserInteractionEnabled: NO];
    [view2.view setUserInteractionEnabled: NO];
    if (view1.view.superview == nil) {  
        coming = view1;
        going = view2;
        transition = UIViewAnimationTransitionFlipFromLeft;
    }
    else {
        coming = view2;
        going = view1;
        transition = UIViewAnimationTransitionFlipFromRight;
    }
    //  [coming.view setFrame:CGRectMake(0, 0, 480, 320)];


    NSArray *viewArray = [[NSArray alloc] initWithObjects:coming, going, nil];
    [coming viewWillAppear:YES];
    [going viewWillDisappear:YES];
    [UIView beginAnimations:@"View Flip" context:viewArray]; {
        [UIView setAnimationDuration:1.0];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDidStopSelector:@selector(animationDidEnd:finished:context:)];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

        [UIView setAnimationTransition:transition forView:self.view cache:cache];
        [self.view addSubview: coming.view];
    }
    [UIView commitAnimations];

}
- (void) animationDidEnd:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
    NSArray *viewArray = context;
    [((UIViewController *)[viewArray objectAtIndex:1]).view removeFromSuperview];
    [[viewArray objectAtIndex:1] viewDidDisappear:YES];
    [[viewArray objectAtIndex:0] viewDidAppear:YES];
    [[[viewArray objectAtIndex:0] view] setUserInteractionEnabled: YES];
    [viewArray release];
}