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Warning: Attempt to present <UINavigationController: 0x6e8ade0> on <LoginViewController: 0x6b3ef90> whose view is not in the window hierarchy!
错误信息如上:
解决办法:
想当前的controller 直接 模态
通过我下面的函数可以获取当前的controller （ [[self topViewController] presentViewController:[[UIViewController alloc] init] animated:YES completion:nil];）
- (UIViewController*)topViewController
{
return [self topViewControllerWithRootViewController:self.window.rootViewController];
}
- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController
{
if ([rootViewController isKindOfClass:[UITabBarController class]]) {
UITabBarController *tabBarController = (UITabBarController *)rootViewController;
return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
} else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController* navigationController = (UINavigationController*)rootViewController;
return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
} else if (rootViewController.presentedViewController) {
UIViewController* presentedViewController = rootViewController.presentedViewController;
return [self topViewControllerWithRootViewController:presentedViewController];
} else {
return rootViewController;
}
}
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