How to add dimmed background to a custom UIPopoverBackgroundView - objective-c

Question

I am making custom popover by subclassing UIPopoverBackgroundView (using this tutorial) and presenting it by using UIPopoverController. Unfortunately as soon as I specify custom popoverBackgroundViewClass the native dimmed background disappears. Is there any way to leave the dimmed background when using custom UIPopoverBackgroundView? Any other solution that I can use to simulate native behaviour?

Answer 1

Not sure why this got down voted, it's a good question because when you implement a custom UIPopoverBackgroundView, the dimmed background doesn't get set. In researching this problem, I determined the best approach is to set it myself!
Just before creating the popover view, I create a "mask view" that will be added to the view before the popover. This code includes a nice fade in effect as well:
self.customPopoverMaskView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
self.customPopoverMaskView.backgroundColor = [UIColor blackColor];
self.customPopoverMaskView.alpha = 0.3f;
[UIView transitionWithView:self.view
duration:0.3
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^ {
[self.view addSubview:self.customPopoverMaskView];
}
completion:nil];
And to remove the view, plug this into the method(s) that handle the popover view disappearing:
[UIView transitionWithView:self.view
duration:0.3
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^ {
[self.customPopoverMaskView removeFromSuperview];
}
completion:nil];
Works well for me. Happy coding!
Aaron

Answer 2

All you need is add next code into initWithFrame: method of your implementation of UIPopoverBackgroundView.
UIView *dimView = [[UIView alloc] initWithFrame:CGRectMake(0 - self.frame.origin.x,
0 - self.frame.origin.y,
[UIScreen mainScreen].bounds.size.width,
[UIScreen mainScreen].bounds.size.height)];
dimView.backgroundColor = [UIColor blackColor];
dimView.alpha = 0.15;
dimView.userInteractionEnabled = NO;
[self addSubview:dimView];
It works as same as default Apple implementation.