How to disable darker transparent effect in UIPopoverController in iOS7? - ios

Question

I use UIPopoverController to popup an view in iPad iOS7 like this:
if (!self.popover) {
UIViewController *popupVC = [[UIViewController alloc] init];
[popupVC.view addSubview:thePopupView];
popupVC.preferredContentSize = CGSizeMake(240, 140);
self.popover = [[UIPopoverController alloc] initWithContentViewController:popupVC];
self.popover.delegate = self;
}
[self.popover presentPopoverFromBarButtonItem:barButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
But when popover active, it make screen darker while this effect not affect other views in iOS6.
How to overcome this issue? Thanks!

Answer 1

If you mean the dimming view that is inserted under the popover, there is only one workaround - use a custom popoverBackgroundViewClass.
It's complicated, but not as complicated as you might think.

Answer 2

Another method is to traverse the popover view stack and remove the dimming view manually, as shown here in a UIPopoverController subclass:
#property (nonatomic, assign) BOOL showsDimmingView;
....
- (void)presentPopoverFromBarButtonItem:(UIBarButtonItem *)item
permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections
animated:(BOOL)animated
{
[super presentPopoverFromBarButtonItem:item
permittedArrowDirections:arrowDirections
animated:animated];
if (!_showsDimmingView) {
[self removeDimmingView:[[UIApplication sharedApplication].keyWindow.subviews lastObject]];
}
}
- (void)presentPopoverFromRect:(CGRect)rect
inView:(UIView *)view
permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections
animated:(BOOL)animated
{
[super presentPopoverFromRect:rect
inView:view
permittedArrowDirections:arrowDirections
animated:animated];
if (!_showsDimmingView) {
[self removeDimmingView:[[UIApplication sharedApplication].keyWindow.subviews lastObject]];
}
}
- (void)removeDimmingView:(UIView *)subview
{
for (UIView *sv in subview.subviews) {
if (sv.alpha == 0.15f && [sv isKindOfClass:NSClassFromString(#"_UIPopoverViewBackgroundComponentView")]) {
sv.alpha = 0.f;
}
const CGFloat *components = CGColorGetComponents(sv.backgroundColor.CGColor);
if (sv.backgroundColor && (components[1] == 0.15f || sv.alpha == 0.15f)) {
[sv removeFromSuperview];
}
[self removeDimmingView:sv];
}
}