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#import "UIView+MGLAdditions.h"
@implementation UIView (MGLAdditions)
- (UIViewController *)mgl_viewControllerForLayoutGuides
{
// Per -[UIResponder nextResponder] documentation, a UIView’s next responder
// is its managing UIViewController if applicable, or otherwise its
// superview. UIWindow’s next responder is UIApplication, which has no next
// responder.
UIResponder *laterResponder = self;
while ([laterResponder isKindOfClass:[UIView class]])
{
laterResponder = laterResponder.nextResponder;
}
if ([laterResponder isKindOfClass:[UIViewController class]])
{
return (UIViewController *)laterResponder;
}
return nil;
}
- (NSLayoutYAxisAnchor *)mgl_safeTopAnchor {
if (@available(iOS 11.0, *)) {
return self.safeAreaLayoutGuide.topAnchor;
} else {
UIViewController *viewController = self.mgl_viewControllerForLayoutGuides;
BOOL useLayoutGuides = viewController.view && viewController.automaticallyAdjustsScrollViewInsets;
if (useLayoutGuides) {
return viewController.topLayoutGuide.bottomAnchor;
}
else {
return self.topAnchor;
}
}
}
- (NSLayoutXAxisAnchor *)mgl_safeLeadingAnchor {
if (@available(iOS 11.0, *)) {
return self.safeAreaLayoutGuide.leadingAnchor;
} else {
return self.leadingAnchor;
}
}
- (NSLayoutYAxisAnchor *)mgl_safeBottomAnchor {
if (@available(iOS 11.0, *)) {
return self.safeAreaLayoutGuide.bottomAnchor;
} else {
UIViewController *viewController = self.mgl_viewControllerForLayoutGuides;
BOOL useLayoutGuides = viewController.view && viewController.automaticallyAdjustsScrollViewInsets;
if (useLayoutGuides) {
return viewController.bottomLayoutGuide.topAnchor;
}
else {
return self.bottomAnchor;
}
}
}
- (NSLayoutXAxisAnchor *)mgl_safeTrailingAnchor {
if (@available(iOS 11.0, *)) {
return self.safeAreaLayoutGuide.trailingAnchor;
} else {
return self.trailingAnchor;
}
}
@end
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