iOS 学习之 UITabBarController

- (IBAction)btnClick:(id)sender {
    
    UITabBarController *tabBarCtrl = [[[UITabBarController alloc] init]autorelease];
    UITabBarItem *tabbarItemA = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:0]autorelease];
    
    tabbarItemA.badgeValue = @"2";
    
    UITabBarItem *tabbarItemB = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:1]autorelease];
    UITabBarItem *tabbarItemC = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemHistory tag:2]autorelease];
    UITabBarItem *tabbarItemD = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:3]autorelease];
    UITabBarItem *tabbarItemE = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemMore tag:4]autorelease];
    UITabBarItem *tabbarItemF = [[[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemSearch tag:4]autorelease];
    
    TWFXViewAController *viewA = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewAController" bundle:nil]autorelease];
    viewA.tabBarItem = tabbarItemA;
    
    TWFXViewAController *viewB = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewBController" bundle:nil]autorelease];
    viewB.tabBarItem = tabbarItemB;
    
    TWFXViewAController *viewC = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewAController" bundle:nil]autorelease];
    viewC.tabBarItem = tabbarItemC;
    
    TWFXViewAController *viewD = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewBController" bundle:nil]autorelease];
    viewD.tabBarItem = tabbarItemD;
    
    TWFXViewAController *viewE = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewBController" bundle:nil]autorelease];
    viewE.tabBarItem = tabbarItemE;
    
    TWFXViewAController *viewF = [[[TWFXViewAController alloc] initWithNibName:@"TWFXViewBController" bundle:nil]autorelease];
    viewF.tabBarItem = tabbarItemF;
    
    tabBarCtrl.viewControllers = @[viewA,viewB,viewC,viewD,viewE,viewF];
    tabBarCtrl.customizableViewControllers =@[viewD,viewE,viewF];
    [tabBarCtrl setSelectedIndex:1];
    
    [self presentViewController:tabBarCtrl animated:YES completion:nil];
}