Iphone 让通知生效？

我目前正试图让NSNotification开始工作，但遇到了一些问题

我有两（2）个视图控制器：A.主视图控制器和B.登录视图控制器

在我的MainViewController中，我有一个注销按钮，该按钮将向我的loginView控制器发送url以加载它（不显示我的loginView）。但是，它不起作用

在我的MainViewController中，这是我拥有的：

- (IBAction)logout:(id)sender {

NSURL *logoutURL = [NSURL URLWithString:@"https://myurl.com/logout"];

[[NSNotificationCenter defaultCenter] postNotificationName:@"logoutInitiated" object:logoutURL];


}

这是我的LoginView控制器中的内容：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    WebView.delegate = self;
    WebView.scalesPageToFit = YES;
    WebView.multipleTouchEnabled = YES;
    loadCount = 0;

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(submitLogout) name:@"logoutInitiated" object:nil];

}

- (IBAction)submitLogout:(NSNotification*)notification {


   [WebView stopLoading];

    NSURL * signOutUrl = (NSURL*)[notification object];
    [self loadURL:nil withURL:signOutUrl];
}

---

我的问题是，当我按下注销按钮时，什么也没有发生。（使用NSLogs，我发现它不会触发下一步）谢谢

添加self作为观察者时，使用选择器“submitLogout”，不带分号！但是您的方法有一个参数，因此正确的选择器应该是

@selector（submitLogout:）

这是因为您在选择器中传递的方法名称是错误的。您需要在

submitLogout:

后缀中添加冒号： 使用

代替

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(submitLogout) name:@"logoutInitiated" object:nil];

---

希望它能帮助您。

注意分号

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(**submitLogout:**) name:@"logoutInitiated" object:nil];    

- (IBAction)logout:(id)sender 
{
        NSURL *logoutURL = [NSURL URLWithString:@"https://myurl.com/logout"];    
        [[NSNotificationCenter defaultCenter] postNotificationName:@"logoutInitiated" object:nil       userInfo:[NSDictionary dictionaryWithObjectsAndKeys:logoutURL,@"RECEIVED_URL", nil]];
}

- (IBAction)submitLogout:(NSNotification*)notification 
{       
    [WebView stopLoading];
     NSURL * signOutUrl = (NSURL*)[notification objectForKey:@"RECEIVED_URL"];
    [self loadURL:nil withURL:signOutUrl];
}

---

哇，我应该休息一下了！我真不敢相信我没听懂！非常感谢你！！！

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(**submitLogout:**) name:@"logoutInitiated" object:nil];    

- (IBAction)logout:(id)sender 
{
        NSURL *logoutURL = [NSURL URLWithString:@"https://myurl.com/logout"];    
        [[NSNotificationCenter defaultCenter] postNotificationName:@"logoutInitiated" object:nil       userInfo:[NSDictionary dictionaryWithObjectsAndKeys:logoutURL,@"RECEIVED_URL", nil]];
}

- (IBAction)submitLogout:(NSNotification*)notification 
{       
    [WebView stopLoading];
     NSURL * signOutUrl = (NSURL*)[notification objectForKey:@"RECEIVED_URL"];
    [self loadURL:nil withURL:signOutUrl];
}