iphone - addSubview animation

Question

I have main UIView where I display different data. Then I put a button, which displays subview like this:

- (IBAction) buttonClicked:(id)sender
{
    UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(25,25,50,20)];
    UILabel *newLabel = [[UILabel alloc] initWithFrame:CGRectMake(25,25,50,25)];
    newLabel.text = @"some text";
    [newView addSubview:newLabel];

    [self.view addSubview:newView];
    [newLabel release];
    [newView release];
}

newView appears fine, but it doesn't animate itself any way, it just appears immediately. How can I add some kind of animation when newView appears? Like zoom or slide down or something like that. Is there some simple code?

Answer 1

[UIView transitionWithView:containerView duration:0.5
        options:UIViewAnimationOptionTransitionCurlUp //change to whatever animation you like
        animations:^ { [containerView addSubview:subview]; }
        completion:nil];