xcode4.2中Tab Bar运用

Question

xcode 4.2中怎样添加Tab Bar子项目呢？ 
                                   谢谢各位先

Answer 1

我给你例子：- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    if (self=[super initWithNibName:nil bundle:nil]) {
        //tabBar1
        FirstTabBar *tab1 = [[[FirstTabBar alloc] init] autorelease];
        tab1.tabBarItem = [[[UITabBarItem alloc] initWithTitle:@"FirstTabBar" 
                                                            image:nil 
                                                              tag:0] autorelease];
        tab1.tabBarItem.image=[UIImage imageNamed:@"icon_map.png"];
        
        
        UINavigationController *tab1Nav = [[[UINavigationController alloc] init] autorelease];
        [tab1Nav pushViewController:tab1 animated:NO];        // TabBar2
        SecondTabBar *tab2 = [[[SecondTabBar alloc] init] autorelease];
        tab2.tabBarItem    = [[[UITabBarItem alloc] initWithTitle:@"SecondTabBar" 
                                                            image:nil 
                                                              tag:0] autorelease];
        tab2.tabBarItem.image=[UIImage imageNamed:@"icon_search.png"];
        //TabBar3
        ThreeTabBar *tab3 = [[[ThreeTabBar alloc] init] autorelease];
        tab3.tabBarItem    = [[[UITabBarItem alloc] initWithTitle:@"ThreeTabBar" 
                                                            image:nil 
                                                              tag:0] autorelease]; 
        tab3.tabBarItem.image=[UIImage imageNamed:@"icon_list.png"];
        //TabBar4
        FourTabBar *tab4 = [[[FourTabBar alloc] init] autorelease];
        tab4.tabBarItem    = [[[UITabBarItem alloc] initWithTitle:@"FourTabBar" 
                                                            image:nil 
                                                              tag:0] autorelease]; 
        tab4.tabBarItem.image=[UIImage imageNamed:@"icon_twitter.png"];
        // 组装TabBar
        self.viewControllers = [NSArray arrayWithObjects:tab1Nav, tab2,tab3,tab4, nil];
    }
    return self;
}