iphone - 以编程方式设置自定义 UITabBarItem？

Question

在 iOS 中，TabBarController 中的 TabBar 属性是只读的。如何将自定义项目与特定 View Controller 关联？如何访问 tabBar 内的 UITabBarItems？

像这样

CustomView *custom = [[CustomView alloc] init];
UITabBarItem *customTab = [[UITabBarItem alloc] initWithTitle:@"Custom" image:[UIImage imageNamed:@"custom.png"] tag:0];
SecondView *second = [[SecondView alloc] init];
UITabBarItem *secondTab = [[UITabBarItem alloc] initWithTitle:@"Next" image:[UIImage imageNamed:@"next.png"] tag:1];
NSArray *views = [NSArray arrayWithObjects:custom,second,nil];
[tabBarController setViewControllers:views];
//how do I set the individual TabBarItems (customTab,secondTab) to be associated
//with the views in question?  tabBarController.tabBar is read only

Answer 1

在每个 View Controller 内，您可以设置 tabBarItem 属性。如果 View Controller 由 UITabBarViewController 拥有，则选项卡栏上的关联项目将相应更新。

类似这样的事情

-(void)viewDidLoad {
    [super viewDidLoad];
    UITabBarItem *tbi = [[UITabBarItem alloc] initWithTitle:yourTitle image:yourIcon tag:yourTag];
    [self setTabBarItem:tbi]
    [tbi release];
}

显然，您不限于在 viewDidLoad 方法中执行此操作。