iOS判断手机APP第一次启动

 //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];

}</pre>