Created
September 6, 2012 23:16
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Find the current top view controller for your iOS application
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| - (UIViewController *)topViewController{ | |
| return [self topViewController:[UIApplication sharedApplication].keyWindow.rootViewController]; | |
| } | |
| - (UIViewController *)topViewController:(UIViewController *)rootViewController | |
| { | |
| if (rootViewController.presentedViewController == nil) { | |
| return rootViewController; | |
| } | |
| if ([rootViewController.presentedViewController isMemberOfClass:[UINavigationController class]]) { | |
| UINavigationController *navigationController = (UINavigationController *)rootViewController.presentedViewController; | |
| UIViewController *lastViewController = [[navigationController viewControllers] lastObject]; | |
| return [self topViewController:lastViewController]; | |
| } | |
| UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController; | |
| return [self topViewController:presentedViewController]; | |
| } |
I'm curious where UIViewController's children has gone?
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I like mohammadshalhoob's version because it takes moreNavigationController into account. However, I found that moreNavigationController.topViewController.view.window != nil didn't work as intended when used in viewWillAppear, before the view is attached to the window. To test whether the sixth or more view controller is selected, I just used tab.selectedIndex > 4.