Block for finding topmost `UIViewController` of frontmost normal-level `UIWindow`.
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UIViewController *(^topmostViewControllerForFrontmostNormalLevelWindow)(void) = ^UIViewController *{ | |
// NOTE: Adapted from various stray answers here: | |
// https://stackoverflow.com/questions/6131205/iphone-how-to-find-topmost-view-controller/20515681 | |
UIViewController *viewController; | |
for (UIWindow *window in UIApplication.sharedApplication.windows.reverseObjectEnumerator.allObjects) { | |
if (window.windowLevel == UIWindowLevelNormal) { | |
viewController = window.rootViewController; | |
break; | |
} | |
} | |
while (viewController != nil) { | |
if ([viewController isKindOfClass:[UITabBarController class]]) { | |
viewController = ((UITabBarController *)viewController).selectedViewController; | |
} else if ([viewController isKindOfClass:[UINavigationController class]]) { | |
viewController = ((UINavigationController *)viewController).visibleViewController; | |
} else if (viewController.presentedViewController != nil && !viewController.presentedViewController.isBeingDismissed) { | |
viewController = viewController.presentedViewController; | |
} else if (viewController.childViewControllers.count > 0) { | |
viewController = viewController.childViewControllers.lastObject; | |
} else { | |
BOOL repeat = NO; | |
for (UIView *view in viewController.view.subviews.reverseObjectEnumerator.allObjects) { | |
if ([view.nextResponder isKindOfClass:[UIViewController class]]) { | |
viewController = (UIViewController *)view.nextResponder; | |
repeat = YES; | |
break; | |
} | |
} | |
if (!repeat) { | |
break; | |
} | |
} | |
} | |
return viewController; | |
}; |
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