添加帶後退按鈕的UINavigationController

Question

我無法弄清楚如何將導航控制器添加到我的iOS應用程序。我需要除「主屏幕」之外的所有視圖都有後退按鈕，但我不確定如何添加它。

這裏是我的項目鏈接： https://www.dropbox.com/s/sv0y3oh1aftxl95/KFBNewsroom%204.zip

Answer 1

從所有的發鈔銀行取出的導航欄，以及使用導航控制器（如應用程序的委託像NeverBe概述），然後過渡到孩子控制器通過pushViewController而不是presentViewController，您應該自動獲得「後退」按鈕。如果您有任何關於dismissViewControllerAnimated的信息，您也可以刪除，因爲您的後退按鈕現在可以爲您做popViewControllerAnimated。但是，如果您需要以編程方式隨時隨地彈出，則可以使用popViewControllerAnimated。

在你的發鈔銀行，你可能還需要調整模擬指標，讓您可以在導航欄圖形表示，如設計你的筆尖：

見View Controller Catalog的導航控制區與請參閱UINavigationController Class Reference。

Answer 2

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 
    // Override point for customization after application launch. 
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:[[KFBViewController alloc] initWithNibName:@"KFBViewController" bundle:nil]]; 
    self.window.rootViewController = nav; 
    self.window.backgroundColor = [UIColor whiteColor]; 
    [self.window makeKeyAndVisible]; 
    return YES; 

調用新的視圖控制器

KFBYouTubeView *youtubeView = [[KFBYouTubeView alloc] initWithNibName:@"KFBYouTubeView" bundle:nil]; 
[self.navigationController pushViewController:youtubeView animated:YES]; 

更新：

方法添加自定義導航欄按鈕

- (void)customizeNavigationButtonWithType:(NavigationBarButtonType)type 
          normalImageName:(NSString *)normalImageName 
         selectedImageName:(NSString *)selectedImageName 
           selector:(SEL)selector { 
    UIImage *img = [UIImage imageNamed:normalImageName]; 
    UIImage *imgPressed = [UIImage imageNamed:selectedImageName]; 
    UIButton *customButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
    [customButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
    [customButton setImage:img forState:UIControlStateNormal]; 
    [customButton setImage:imgPressed forState:UIControlStateHighlighted]; 
    customButton.frame = CGRectMake(0, 0, img.size.width, img.size.height); 
    [customButton addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside]; 

    UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithCustomView:customButton]; 
    switch (type) { 
     case NavigationBarButtonTypeLeft: 
      [self.navigationItem setLeftBarButtonItem:btn animated:YES]; 
      break; 
     case NavigationBarButtonTypeRight: 
      [self.navigationItem setRightBarButtonItem:btn animated:YES]; 
      break; 
    } 
} 

用法：

[self customizeNavigationButtonWithType:NavigationBarButtonTypeRight 
         normalImageName:@"create.png" 
         selectedImageName:@"create_highlight.png" 
           selector:@selector(pressButton:)];