如何在导航栏上放置后退按钮

Question

我是iPhone新手。我有一个小小的怀疑，那就是我创建了一个项目，当我点击一个按钮时，它会打开UIWebView那个UIView我想要一个带有后退按钮的导航栏，这是可能的。为此，我写了一些代码，但在这里我不能够创建回button.If任何身体知道这个请大家帮我... 下面的代码我已经为这个

BiblePlayerViewController.m

- (IBAction)aboutUsButtonClicked:(id)sender { 

     UIWebView *aboutUsWebView = [[UIWebView alloc]initWithFrame:CGRectMake(0,44, 320, 460)]; 
     [self.view addSubview:aboutUsWebView]; 
     [aboutUsWebView setOpaque:NO]; 
     aboutUsWebView.backgroundColor = [UIColor whiteColor]; 
     aboutUsWebView.delegate = self; 

     [aboutUsWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.ayansys.com/"]]]; 

     biblePlayerController = [[BiblePlayerViewController alloc]initWithNibName:@"BiblePlayerViewController" bundle:nil]; 

     navigationController = [[UINavigationController alloc]init]; 
     navigationController.view.frame = CGRectMake(0, 0, 320, 44); 
     [self.view addSubview:navigationController.view]; 

     self.navigationController.navigationBar.tintColor=[UIColor orangeColor]; 

     UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(GotoBiblePlayerViewController)];   

     self.navigationItem.leftBarButtonItem = backButton; 
} 

Answer 1

[self.navigationController setNavigationBarHidden:NO animated:YES]; 

放写这在你的viewDidAppear,viewDidLoad或viewWillAppear。

或本：

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleDone target:nil action:nil]; 
self.navigationItem.backBarButtonItem = backButton;