Prevent iOS from taking screen capture of app before going into background

Question

You all might know that iOS takes a screen shot of your application before throwing it into the background. This is usually for a better User experience like quick animation

Answer 1

Implementation with some animation while going in background and reverse action

   - (void)applicationWillResignActive:(UIApplication *)application
{
     //     fill screen with our own colour
        UIView *colourView = [[UIView alloc]initWithFrame:self.window.frame];
        colourView.backgroundColor = [UIColor blackColor];
        colourView.tag = 1111;
        colourView.alpha = 0;
        [self.window addSubview:colourView];
        [self.window bringSubviewToFront:colourView];

        // fade in the view
        [UIView animateWithDuration:0.5 animations:^{
            colourView.alpha = 1;
        }];

}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // grab a reference to our coloured view
    UIView *colourView = [self.window viewWithTag:1111];
    // fade away colour view from main view
    [UIView animateWithDuration:0.5 animations:^{
        colourView.alpha = 0;
    } completion:^(BOOL finished) {
        // remove when finished fading
        [colourView removeFromSuperview];
    }];

 }