objective-c - 标签栏 Controller 项目从右侧开始

Question

我正在尝试使选项卡栏的项目从右侧开始。 我的意思是:

对象选项卡:

1 2 3 4

就像:

4 3 2 1

但是当我在视觉上做到这一点时，它就做到了:

1 2 3 4

当项目看起来像:

4 3 2 1

我希望它以 1 打开(最右边的选项)打开

任何帮助都会有帮助! 谢谢:)

Answer 1

好吧，您所做的就是忽略界面构建器中的设置。

在您的 AppDelegate.m 中，您很可能正在启动 UITabbarController...并将其更改为如下所示:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.
    UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
    UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
    UIViewController *viewController3 = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
    UIViewController *viewController4 = [[FourthViewController alloc] initWithNibName:@"FourthViewController" bundle:nil];

    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = @[viewController4, viewController3, viewController2, viewController1];

    self.window.rootViewController = self.tabBarController;

    [self.window makeKeyAndVisible];
    return YES;
}

这将使您的选项卡按 4、3、2、1 的顺序显示。