问题
I'm using a stock UISplitViewController
with out-of-the-box Master
and Detail
view controllers. In a storyboard, I've added a UIImageView
to the Detail
controller set to effectively fill the view with a single image.
In the Master
controller, I've used the following to blur the background of that controller:
// In viewDidLoad
self.tableView.backgroundColor = [UIColor clearColor];
UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView *visualEffectView = [[UIVisualEffectView alloc]
initWithEffect:blurEffect];
self.tableView.backgroundView = visualEffectView;
self.tableView.separatorEffect = [UIVibrancyEffect effectForBlurEffect:blurEffect];
When the Master
controller appears above the Detail
controller, note how the edges of the Master
controller have a dark shadow around the inner edges.
How can these "shadows" be removed to instead render a uniform blur?
More Details
Debugging the view hierarchy in IB reveals a (private?) view called _UIPopoverSlidingChromeView
. It has an inset grey frame, and it's definitely what's responsible for the non-uniform blur appearance.
Disabling the blur view altogether and just leaving self.tableview.backgroundColor = [UIColor clearColor]
shows _UIPopoverSlidingChromeView
's grey frame. It looks like this:
Any thoughts on how to avoid _UIPopoverSlidingChromeView
when using UISplitViewController
?
回答1:
The problem is that it is a private class that you can't test against.
Fortunately _UIPopoverSlidingChromeView
is the subclass of UIPopoverBackgroundView
that is public (because in regular popover implementation flow client may customize the popover background chrome by providing a class which subclasses UIPopoverBackgroundView
).
for (UIView *subview in self.viewController.view.superview.superview.subviews) {
if ([subview isKindOfClass:[UIPopoverBackgroundView class]]) {
subview.alpha = 0.0;
}
}
This should hide the _UIPopoverSlidingChromeView
.
回答2:
//как убрать дурацкий прямоугольник при прозрачном фоне maser окна в режиме UISplitViewControllerDisplayModeOverlay
CALayer* v_1 = self.view.superview.superview.superview.layer.sublayers[0];
CALayer* v_2=v_1.sublayers[0];
v_2.borderWidth=0;
来源:https://stackoverflow.com/questions/26164982/achieve-a-uniform-uiblureffect-in-the-primary-view-of-a-uisplitview