iphone sdk uitabbarcontroller 不起作用

Question

我正在尝试创建 3 个 Tabbar 控件，但第三个不显示页面，有人知道代码有什么问题吗？提前致谢。

        FirstViewController* viewController1 = [[FirstViewController alloc]init]; 
 MySecondViewController* viewController2 = [[MySecondViewController alloc]init];
 MyThirdViewController* viewController3 = [[MyThirdViewController alloc]init];


 NSArray* controllersArray = [NSArray arrayWithObjects:viewController1, viewController2, viewController3, nil];              
 tabController = [[UITabBarController alloc]init];
 [tabController setViewControllers:controllersArray]; 

 [viewController1 release];
 [viewController2 release];
 [viewController3 release];

Answer 1

由于没有提供其他代码，我举一个例子。扩展您的类，使用 UITabBarController 随意命名它。然后在你的 UITabBarController 子类中做这样的事情。

FirstViewController *vc1 = [[FirstViewController alloc] init];
SecondViewController *vc2 = [[SecondViewController alloc] init];
ThirdViewController *vc3 = [[ThirdViewController alloc] init];

NSArray *array = [[NSArray alloc] initWithObjects: vc1, vc2, vc3, nil];

self.controllers = array;

[vc1 release];
[vc2 release];
[vc3 release];
[array release];

然后你只需在上面列出的三个类中设置文本和 tabbarimage 即可。

一个例子是：

[self.tabBarItem setTitle:@"FirstViewController"];
[self.tabBarItem setImage:[UIImage imageNamed:IMAGEPATH]];