Unwanted margin UIPopoverController

问题

When I present my popover in a view and place it at the side of the view. There is always a small margin, causing the popover to not stick to the side.

UIViewController *vc =  [self getViewController:@"popover" fromStoryboard:@"Main"];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:vc];
[popover presentPopoverFromRect:CGRectMake(1100, 0, -65, 65)
                              inView:self.view
            permittedArrowDirections:UIPopoverArrowDirectionUp
                       animated:YES];
[vc setPreferredContentSize:CGSizeMake(300, 300)];

How do I prevent this margin and show my popover sticking to the side of the view?

Thanks

回答1:

I fixed this issue by adding my own UIPopoverBackgroundView implementation where I set my own contentview insets.

+ (UIEdgeInsets)contentViewInsets {
    return UIEdgeInsetsMake(-10, -10, -10, -10);
}

and adding this backgroundview to my popovercontroller

[self.popover setPopoverBackgroundViewClass:[MyPopoverBackgroundView class]];

来源：https://stackoverflow.com/questions/31023234/unwanted-margin-uipopovercontroller