addSubview animation

link against QuarzCore framework

#import <QuartzCore/QuartzCore.h>

CATransition *transition = [CATransition animation];
transition.duration = 1.0;
transition.type = kCATransitionPush; //choose your animation
[newView.layer addAnimation:transition forKey:nil];
[self.view addSubview:newView]; 

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

Let's do this in swift.

var redView = UIView(frame:CGRectMake(20,20,100,100))
redView.backgroundColor = UIColor.redColor
redView.alpha = 0.0
view.addSubview(redView)

UIView.animateWithDuration(0.25) { () -> Void in
    redView.alpha = 1.0
}

Adding a subview cannot be animated by simply putting it in an animateWithDuration block. And it can't be animated using hidden.

Hi You could use the UIView Animations:

[newView setFrame:CGRectMake( 0.0f, 480.0f, 320.0f, 480.0f)]; //notice this is OFF screen!
[UIView beginAnimations:@"animateTableView" context:nil];
[UIView setAnimationDuration:0.4];
[newView setFrame:CGRectMake( 0.0f, 0.0f, 320.0f, 480.0f)]; //notice this is ON screen!
[UIView commitAnimations];

The SDK will now figure this out for you and animate the view to the positions you gave it. This works for most properties of UIViews: alpha, scale, bounds, frames, etc.

There are also build in animations as flip and curl:

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight
                           forView:newView
                            cache:YES];

[self.navigationController.view addSubview:settingsView.view];
[UIView commitAnimations];

Hope this helps out getting you started:)