如何在UINavigationController的RootViewController上显示后退按钮？ [英] How to show back button on the RootViewController of the UINavigationController?

问题描述

这是我的代码。我想在开放的rootviewController上放一个后退按钮。

Here is my code. I want to put a back button on the opening rootviewController.

- (void)selectSurah:(id)sender {

    SurahTableViewController * surahTableViewController = [[SurahTableViewController alloc] initWithNibName:@"SurahTableViewController" bundle:nil];
    surahTableViewController.navigationItem.title=@"Surah";

    surahTableViewController.navigationItem.backBarButtonItem.title=@"Back";

    UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:surahTableViewController];

    [self presentModalViewController:aNavigationController animated:YES];   
}

推荐答案

我不相信它是可以将根视图控制器从导航堆栈中弹出，但你可以假设 UIButton 作为 UIBarButtonItem的自定义视图：

I don't believe it's possible to pop the root view controller off the navigation stack, but you can fake it with a UIButton added as the custom view of a UIBarButtonItem:

UIButton *b = [[UIButton alloc]initWithButtonType:UIButtonTypeCustom];
[b setImage:[UIImage imageNamed:@"BackImage.png"] forState:UIControlStateNormal];
[b addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
self.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:b];

可以找到合适的iOS UI元素PSD 这里。

A suitable PSD of iOS UI elements can be found here.

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