IOS 开发中 Whose view is not in the window hierarchy 错误的解决办法
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在 IOS 开发当中经常碰到 whose view is not in the window hierarchy 的错误,该错误简单的说,是由于 "ViewController" 还没有被加载,就调用该 ViewController 或者 ViewController 内的方法时,就会报这个错误。
在不同地方调用 ViewController,解决的方法也不太一样。
1. 在 一个 ViewController 里面调用另外一个 ViewController 是出现这个错误:
该错误一般是由于在 viewDidLoad 里面调用引起的,解决办法是转移到 viewDidAppear 方法里面
2. 在 AppDelegate.m 中调用遇到这个错误
解决办法1:
UIViewController *topRootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;while (topRootViewController.presentedViewController) { topRootViewController = topRootViewController.presentedViewController; } //[topRootViewController presentViewController:yourController animated:YES completion:nil];//or[topRootViewController myMethod];
UIStoryboard *mainstoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; LoginViewController* loginViewController = [mainstoryboard instantiateViewControllerWithIdentifier:@"LoginViewController"]; [self.window makeKeyAndVisible];//[LoginViewController presentViewController:yourController animated:YES completion:nil];//or[LoginViewController myMethod];
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