Animate Dynamically created buttons

[syler]

I'm dynamically creating UIButton's in my app. When I show the buttons I want to animate them. I can't seem to get the buttons to animate with this code:

UIImage *buttonBackground = [UIImage imageNamed:@"ButtonRed.png"];
for (NSInteger x = 0; x < 4; x++) {

    CGRect btnFrame = CGRectMake(x * (buttonBackground.size.width+2),
                                 y * (buttonBackground.size.height + 1),
                                 buttonBackground.size.width,
                                 buttonBackground.size.height);
    UIButton *gridButton = [[[UIButton alloc] initWithFrame: btnFrame] retain];

    [gridButton setBackgroundImage:buttonBackground forState:UIControlStateNormal];
    [buttonBackground release];

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:.5];
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:gridButton cache:YES];

    [self.view addSubview:gridButton];

    [UIView commitAnimations];
    [gridButton release];
}

If I change the "forView:gridButton" to "forView:self.view", then the whole view flips but but not the individual buttons. I just want each individual button to flip.

Thanks for any help.

[syler]

It seemed as though the animations would not run inside the for loop for each individual button. I tried to wrap the whole FOR loop in a beginAnimations call, but that didn't work either.

I was finally able to animate the buttons by setting all the dynamically created buttons to be hidden at first in the FOR loop and then just outside the FOR loop I created a timer that would unhide them while doing the animation.

Here's the code changes I made:

    UIImage *buttonBackground = [UIImage imageNamed:@"ButtonRed.png"];
    for (NSInteger x = 0; x < 4; x++) {
    
        CGRect btnFrame = CGRectMake(x * (buttonBackground.size.width+2),
                                     y * (buttonBackground.size.height + 1),
                                     buttonBackground.size.width,
                                     buttonBackground.size.height);
        UIButton *gridButton = [[[UIButton alloc] initWithFrame: btnFrame] retain];
    
        [gridButton setBackgroundImage:buttonBackground forState:UIControlStateNormal];
        [buttonBackground release];
    
        // ****** I took out all animation code ******
        [self.view addSubview:gridButton];
        gridButton.hidden = YES; // <----------- ****** new code ******
    
        [gridButton release];
    }

    // **** the following code was added just outside the FOR loop to create timer that will animate buttons as they're un-hidden.
    // NSTimer gridTimer is created in the header file.
	gridTimer = [NSTimer scheduledTimerWithTimeInterval:.1 target:self selector:@selector(showGrid) userInfo:nil repeats:NO];

Here's the new method I call with the timer:

    -(void) showGrid{
    	for (UIButton *obj in self.view.subviews) {
    		if ([obj isMemberOfClass:[UIButton class]]) {
    			[UIView beginAnimations:nil context:NULL];
    			[UIView setAnimationDuration:1];
    			[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:obj cache:YES];//~~self.view cache:YES];				
    			obj.hidden = NO;
    			[UIView commitAnimations];
    		}
    	}
    	[gridTimer invalidate];
    }