UITabBarController 使用

NCAppDelegate.h

#import <UIKit/UIKit.h>@interface NCAppDelegate : UIResponder <UIApplicationDelegate> {    UIWindow *window;UITabBarController *tabBarController;}@property (nonatomic, retain) UIWindow *window;@property (nonatomic, retain) UITabBarController *tabBarController;@end

NCAppDelegate.m

@synthesize window;@synthesize tabBarController;- (void)dealloc{    [window release];    [tabBarController release];    [super dealloc];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];        tabBarController = [[UITabBarController alloc] init];        HomeViewController *vc1 = [[HomeViewController alloc] init];    MetionsViewController *vc2 = [[MetionsViewController alloc] init];    FavoritesViewController *vc3 = [[FavoritesViewController alloc] init];    ProfileViewController *vc4 = [[ProfileViewController alloc] init];        NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2,vc3,vc4, nil];        tabBarController.viewControllers = controllers;        [window addSubview:tabBarController.view];    [self.window makeKeyAndVisible];    return YES;}

HomeViewController.m

@implementation HomeViewController- (id)init {    if (self = [super init]) {        self.title = @"主页";        UIImage* anImage = [UIImage imageNamed:@"home_default.png"];        UITabBarItem* theItem = [[UITabBarItem alloc] initWithTitle:@"主页" image:anImage tag:0];        self.tabBarItem = theItem;        [theItem release];    }    return self;}