Iphone 如何在UITabBarController中修改标题和徽章图标

我有以下代码：

tabBarViewController = [[TabBarViewController alloc] init];
mvc = [[MapViewController alloc] init];
tvc = [[TableViewController alloc] init];
tabBarViewController.viewControllers = [NSArray arrayWithObjects: tvc, mvc, nil];

---

然而，当在模拟器中打开时，我没有看到这两个UtiAbar的任何头衔或徽章。如何将标题和徽章分配给这两者？

TabBarViewController的UITabBar有一个属性。
UITabBar拥有拥有徽章的UITabBarItem列表

[tabBarViewController.tabBar.items objectAtIndex:0].badgeValue = @"1";

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TabBarViewController的UITabBar有一个属性。
UITabBar拥有拥有徽章的UITabBarItem列表

[tabBarViewController.tabBar.items objectAtIndex:0].badgeValue = @"1";

---

必须设置每个子视图控制器的tabBarItem属性：

MapViewController* mvc = [[MapViewController alloc] init];
UIImage* mapIcon = [UIImage imageNamed:@"mapIcon.png"];
mvc.tabBarItem = [[[UITabBarItem alloc] initWithTitle:@"Map" image:mapIcon tag:0] autorelease];
mvc.tabBarItem.badgeValue = @"abc";

TableViewController* tvc = [[TableViewController alloc] init];
tvc.tabBarItem = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:0] autorelease];
mvc.tabBarItem.badgeValue = @"100";

---

必须设置每个子视图控制器的tabBarItem属性：

MapViewController* mvc = [[MapViewController alloc] init];
UIImage* mapIcon = [UIImage imageNamed:@"mapIcon.png"];
mvc.tabBarItem = [[[UITabBarItem alloc] initWithTitle:@"Map" image:mapIcon tag:0] autorelease];
mvc.tabBarItem.badgeValue = @"abc";

TableViewController* tvc = [[TableViewController alloc] init];
tvc.tabBarItem = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:0] autorelease];
mvc.tabBarItem.badgeValue = @"100";

---

为什么不在tvc、mvc中使用此代码

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        // Custom initialization

  self.tabBarItem = [ [ UITabBarItem alloc ]
         initWithTitle:@"YOUR TITLE"
         image:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"IMAGE" ofType:@"png"]]
         tag:1 ];

    }
    return self;
}

---

为什么不在tvc、mvc中使用此代码

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        // Custom initialization

  self.tabBarItem = [ [ UITabBarItem alloc ]
         initWithTitle:@"YOUR TITLE"
         image:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"IMAGE" ofType:@"png"]]
         tag:1 ];

    }
    return self;
}