新建一个简单视图iOS工程，在ViewController的viewDidLoad中代码如下
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
tabBarCtrl = [[UITabBarController alloc] init];//要加入的TabBarController
tabBarCtrl.delegate = self;
//
firstViewCtl = [[UIViewController alloc] init];
firstViewCtl.title = @"first view controller";
firstViewCtl.view.backgroundColor = [UIColor blueColor];
firstViewCtl.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"rename first" image: nil tag:1];//自定义tabBarItem,可以贴tabBarItem背景图片，如果不写，tabBarItem的标签将显示为firstViewCtl.title内容
secondViewCtrl = [[UIViewController alloc] init]; secondViewCtrl.title = @"second view controller"; secondViewCtrl.view.backgroundColor = [UIColor redColor];
secondViewCtrl.tabBarItem.badgeValue = [NSString stringWithFormat:@"%d",8]; //tabBarItem红色小圈中显示数字
secondViewCtrl.tabBarItem.tag = 2; //加标示
NSArray *arryViewContrller = [NSArray arrayWithObjects:firstViewCtl, secondViewCtrl,nil]; tabBarCtrl.viewControllers = arryViewContrller; tabBarCtrl.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height); [self.view addSubview:tabBarCtrl.view]; }
添加委托，ViewController.h中
@interface ViewController : UIViewController<UITabBarDelegate>
{
UITabBarController *tabBarCtrl;
UIViewController *firstViewCtl;
UIViewController *secondViewCtrl;
}
tabBarItem点击响应
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{ NSString *strTitle = viewController.title;
NSLog(@"Title:%@ tag:%d", strTitle , viewController.tabBarItem.tag);
if(1 == viewController.tabBarItem.tag)
{
viewController.tabBarItem.badgeValue = [NSStringstringWithFormat:@"%d", rand()%100];
}
}
小结:
UITabBarController 继承自UIViewController,所以嘛。。。。。不多说了，你懂的！！