Iphone 我想实现TabBarController并添加导航控制器视图，但没有成功

我知道如何通过Interface Builder添加带有两个TabBar按钮的TabBar。我将每个按钮链接到导航控制器

现在我想学习如何以编程的方式做每件事。现在我可以在模拟器中看到一个选项卡栏，但上面没有按钮。谁能帮我一下吗。谢谢

这是TabBarAppDelegate.h

#import <UIKit/UIKit.h>
@interface TabBarAppDelegate : NSObject <UIApplicationDelegate> 
{
    UIWindow *window;
    UITabBarController *tabBarController;
    IBOutlet UINavigationController *navigationController1;
    IBOutlet UINavigationController *navigationController2;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) UITabBarController *tabBarController;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController1;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController2;
@end

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看起来您没有初始化导航视图控制器。看看这是否可行：

TabBarAppDelegate.h

• 删除属性navigationController1和navigationController2

TabBarAppDelegate.m

• 替换

  [self.navigationController1 pushViewController:firstViewController animated:NO];
  

  [self.navigationController2 pushViewController:secondViewController animated:NO];
  

与

• 替换

  [self.navigationController1 pushViewController:firstViewController animated:NO];
  

  [self.navigationController2 pushViewController:secondViewController animated:NO];
  

与

• 将navigationController1和navigationController2添加到tabBarController后，释放它们

---

谢谢您的回复。但是这样，navigationController1和navigationController2将在AppDelegate.m之外过期。如果我仍然想将另一个视图推送到FirstViewController，该怎么办？要将另一个视图推送到FirstViewController，在FirstViewController中，您可以使用[self.navigationController pushViewController:animated:]我现在完全明白了。非常感谢你。

UINavigationController *navigationController2 = [[UINavigationController alloc] initWithRootViewController:secondViewController];