ios开发－判断手机APP第一次启动

代码：

 //判断是不是第一次启动

    if (![[NSUserDefaults standardUserDefaults]boolForKey:@"fristLaunch11"]) {

        

        [[NSUserDefaults standardUserDefaults]setBool:YES forKey:@"fristLaunch11"];

        [[NSUserDefaults standardUserDefaults] synchronize];

        

        //使启动界面停留 2.0 秒

        [NSThread sleepForTimeInterval:2.0];

        userGuideViewController = [[UserGuideViewController alloc] init];

        self.window.rootViewController = userGuideViewController;//设置启动根视图

        [userGuideViewController release];

    }

    else

    {

        [NSThread sleepForTimeInterval:2.0];

        getPicViewController = [[GetPicViewController alloc] init];

        self.window.rootViewController = getPicViewController;

        [getPicViewController release];

    }