Question

我是iPhone新手。我有一个小小的疑问，就是我创建了一个项目，因为当我点击它时，我会放置一个按钮UIWebView UIView我想要一个带有后退按钮的导航栏如何可能为此，我写了一些代码，但在这里我无法创建后退按钮。如果有人知道这个，请帮帮我... 我为此编写了以下代码

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];

将其放入viewDidAppear，viewDidLoad或viewWillAppear。

或者这个：

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

如何在导航栏上放置后退按钮

1 个答案: