Adding fade out effect on -[UIView removeFromSuperview]

UIView+JTRemoveAnimated.h

//
//  UIView+JTRemoveAnimated.h
//
//  Created by james on 9/1/11.
//  http://ioscodesnippet.tumblr.com/
//
@interface UIView (JTRemoveAnimated)

- (void)removeFromSuperviewAnimated;

@end

UIView+JTRemoveAnimated.m

//
//  UIView+JTRemoveAnimated.m
//
//  Created by james on 9/1/11.
//  http://ioscodesnippet.tumblr.com/
//

// Updated at 10/12/12 for ARC projects

#import "UIView+JTRemoveAnimated.h"
#import <QuartzCore/QuartzCore.h>

@implementation UIView (JTRemoveAnimated)

// remove static analyser warnings
#ifndef __clang_analyzer__

- (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
    if ([animationID isEqualToString:@"fadeout"]) {
        // Restore the opacity
        CGFloat originalOpacity = [(__bridge_transfer NSNumber *)context floatValue];
        self.layer.opacity = originalOpacity;
        [self removeFromSuperview];
    }
}

- (void)removeFromSuperviewAnimated {
    [UIView beginAnimations:@"fadeout" context:(__bridge_retained void *)[NSNumber numberWithFloat:self.layer.opacity]];
    [UIView setAnimationDuration:0.3];
    [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];
    [UIView setAnimationDelegate:self];
    self.layer.opacity = 0;
    [UIView commitAnimations];
}

#endif

@end