iOS结合导航控制器和标签栏控制器

<span style="font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="objc">- (void)initTabBar
{
//    初始化主页
HomePageViewController *homePage = [[HomePageViewController alloc]init];
UINavigationController *homePageNav = [[UINavigationController alloc]initWithRootViewController:homePage];

//    推断是否存在用户存储的城市
NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
if (![userDefault objectForKey:@"cityDic"]) {
CitySelectionViewController *citySelection = [[CitySelectionViewController alloc]init];
[homePageNav pushViewController:citySelection animated:YES];
}
// 设置主页-TabBar
UITabBarItem *itemHomePage= [[UITabBarItem alloc] initWithTitle:@"首页" image:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.png"] scaledToSize:CGSizeMake(25, 25)] tag:0];
[itemHomePage setFinishedSelectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.jpg"] scaledToSize:CGSizeMake(25, 25)] withFinishedUnselectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-2.jpg"] scaledToSize:CGSizeMake(25, 25)]];
homePageNav.tabBarItem=itemHomePage;
[itemHomePage setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:NAVBACKGROUNDCOLOR,UITextAttributeTextColor, nil] forState:UIControlStateSelected];

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO([NSString stringWithFormat:@"7.0"])) {
[homePageNav.navigationBar setBarTintColor:NAVBACKGROUNDCOLOR];
}else
{
[homePageNav.navigationBar setTintColor:NAVBACKGROUNDCOLOR];
}
homePageNav.navigationBar.translucent = NO;

//    初始化我的购物车
ShoppingCartViewController *shoppingCart = [[ShoppingCartViewController alloc]init];
UINavigationController *shoppingCartNav = [[UINavigationController alloc]initWithRootViewController:shoppingCart];

// 设置购物车-TabBar
UITabBarItem *itemShoppingCart= [[UITabBarItem alloc] initWithTitle:@"我的购物车" image:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.png"] scaledToSize:CGSizeMake(25, 25)] tag:0];
[itemShoppingCart setFinishedSelectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.jpg"] scaledToSize:CGSizeMake(25, 25)] withFinishedUnselectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-2.jpg"] scaledToSize:CGSizeMake(25, 25)]];
shoppingCartNav.tabBarItem=itemShoppingCart;
[itemShoppingCart setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:NAVBACKGROUNDCOLOR,UITextAttributeTextColor, nil] forState:UIControlStateSelected];

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO([NSString stringWithFormat:@"7.0"])) {
[shoppingCartNav.navigationBar setBarTintColor:NAVBACKGROUNDCOLOR];
}else
{
[shoppingCartNav.navigationBar setTintColor:NAVBACKGROUNDCOLOR];
}
shoppingCartNav.navigationBar.translucent = NO;

//    初始化我的汇众
IndividualCenterViewController *individualCenter = [[IndividualCenterViewController alloc]init];
UINavigationController *individualCenterNav = [[UINavigationController alloc]initWithRootViewController:individualCenter];

// 设置汇众-TabBar
UITabBarItem *itemindividualCenter= [[UITabBarItem alloc] initWithTitle:@"我的幸福家" image:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.png"] scaledToSize:CGSizeMake(25, 25)] tag:0];
[itemindividualCenter setFinishedSelectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-1.jpg"] scaledToSize:CGSizeMake(25, 25)] withFinishedUnselectedImage:[UIImage imageWithImage:[UIImage imageNamed:@"1-2.jpg"] scaledToSize:CGSizeMake(25, 25)]];
individualCenterNav.tabBarItem=itemindividualCenter;
[itemindividualCenter setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:NAVBACKGROUNDCOLOR,UITextAttributeTextColor, nil] forState:UIControlStateSelected];

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO([NSString stringWithFormat:@"7.0"])) {
[individualCenterNav.navigationBar setBarTintColor:NAVBACKGROUNDCOLOR];
}else
{
[individualCenterNav.navigationBar setTintColor:NAVBACKGROUNDCOLOR];
}
individualCenterNav.navigationBar.translucent = NO;

self.tabBar = [[UITabBarController alloc] init];
[[UITabBar appearance] setBackgroundImage:[UIImage setBackgroundImageByColor:COLOR(255, 255, 255, 1) withFrame:RectWithPara(0, 0, SCREEN_WIDTH, 44)]];  // 设置UITabBar背景图片
[[UITabBar appearance] setSelectionIndicatorImage:
[UIImage imageWithTint:COLOR(235, 235, 235, 1)]];
self.tabBar.viewControllers = [NSArray arrayWithObjects:homePageNav,shoppingCartNav,individualCenterNav, nil];
}

<span style="font-family: Arial, Helvetica, sans-serif;">在程序启动时设置根控制器为 tabbar,例如以下</span>

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary
*)launchOptions

{

self.window = [[UIWindow
alloc] initWithFrame:[[UIScreen
mainScreen] bounds]];

[self
initTabBar];

self.window.rootViewController =
self.tabBar;

self.window.backgroundColor = [UIColor
whiteColor];

[self.window
makeKeyAndVisible];

return
YES;

}