如何在应用程序启动时运行一次？

Question

我想，当我的应用程序越来越推出，但我完全驱动疯狂已经发挥了电影的介绍，我做了很多测试，在我的代码，以试图利用此

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    // Override point for customization after application launch. 
    NSLog(@"App started to launch"); 
    [self.window makeKeyAndVisible]; 
    [self.window addSubview:_intro.view]; 
    return YES; 
} 

沿但这是使我的视频运行，即使我来自背景。
如果像按中间按钮，然后双击中间按钮并按下应用程序图标，我会再次播放电影。

我忘了提，这是我的viewDidLoad

- (void)viewDidLoad  
{ 
    [super viewDidLoad]; 
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults]; 
    BOOL launchedBefore = [userDefaults boolForKey:@"hasRunBefore"]; 
    NSLog(@"value of hasRunBefore is %d",launchedBefore); 
    if(!launchedBefore) 
    { 
     [userDefaults setBool:1 forKey:@"hasRunBefore"]; 
     launchedBefore = [userDefaults boolForKey:@"hasRunBefore"]; 
     NSLog(@"value of hasRunBefore is %d",launchedBefore); 
     [self playvideo]; 
    } 
} 

Answer 1

NSUserDefaults，直到您发送synchronize消息不提交更改到磁盘。

尝试添加这样做：

[userDefaults setBool:YES forKey:@"hasRunBefore"]; 
[userDefaults synchronize];