更改ViewController沒有設置navigationitem

我在兩個navigationviewcontroller之間通過instantiateViewControllerWithIdentifier在swift之間移動，但後者的兩個navigationcontroller的設置一個back navigationitem，我不想這樣做，因爲它會從登錄到家！更改ViewController沒有設置navigationitem

沒有人知道我可以如何禁用它進行此操作？

var vc = storyboard.instantiateViewControllerWithIdentifier("mainUserView") as UIViewController 

self.showViewController(vc, sender: vc)

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2014-10-26 John Doe

寫一些字顯示的代碼你使用 – Wain 2014-10-26 16:52:51

@Wain剛剛編輯了這個問題，謝謝 – 2014-10-26 17:02:50

怎麼樣顯示導航控制器的登錄viewcontroller作爲它的根在模態上的home viewcontroller？如果您不需要像註冊一樣顯示另一個視圖控制器，您可以以模態形式呈現它，而無需將其嵌入到導航控制器中。

例如，我這樣做是在AppDelegate中didFinishLaunchingWithOptions方法

UINavigationController *homeNavigationController = (UINavigationController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"homeNavigationController"]; // the navigation Controller that has HomeViewController as its root 

[self.window setRootViewController: homeNavigationController]; 

[self.window makeKeyAndVisible]; 

if (![User isUserRegistered]) { //if user is not registered show login screens 
    UIViewController *introNavigationController = [mainStoryboard instantiateViewControllerWithIdentifier: @"IntroNavigationController"]; // the navigation Controller that has LoginViewController as its root 
    [self.window.rootViewController presentViewController:introNavigationController animated:NO completion:nil]; 
}

來源

2014-10-26 20:37:08

當你需要回到家裏，消失後退按鈕，你可以在登錄類

`//let backButton disappear 
    navigationItem.leftBarButtonItem = UIBarButtonItem() 
    navigationItem.leftBarButtonItem?.title = ""`

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2015-02-15 02:51:04 lifefarmer

更改ViewController沒有設置navigationitem

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