用代码创建UITabBarController

最新推荐文章于 2017-08-02 22:54:43 发布

原创最新推荐文章于 2017-08-02 22:54:43 发布 · 401 阅读

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本文介绍了一个iOS应用启动时的基本配置流程，包括设置窗口背景颜色、为两个初始视图控制器（FirstViewController和SecondViewController）配置背景图片及标题，并为它们的tabBarItem设置选中与未选中状态的图标，最后将这些视图控制器整合到UITabBarController中。

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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    FirstViewController* first = [[FirstViewController alloc]init];
    //设置背景图片

first.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"31.png"]];

//设置tabBarItem选中后的图片与选中前的图片

[first.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"g1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"nn.png"]];

//设置标题

first.title = @"first";

    first.tabBarItem.badgeValue = @"OK";

    SecondViewController* second = [[SecondViewController alloc]init];
    second.title = @"second";
    second.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"31.png"]];
    [second.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"g1.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"shuijiao.png"]];
    second.tabBarItem.badgeValue = @"OK";

    UITabBarController* tc = [[UITabBarController alloc]init];
    tc.viewControllers = [NSArray arrayWithObjects:first,second, nil];
    tc.selectedIndex = 0;

    self.window.rootViewController = tc;

    [first release];
    [second release];

    return YES;
}