ios - Facebook iOS SDK 集成在 Appdelegate.m 中显示错误

Question

在 htttps://developer.facebook.com 中，他们使用 API 调用示例登录，他们要求在我的应用程序 delegate.m 文件中输入以下代码

// Whenever a person opens the app, check for a cached session
if (FBSession.activeSession.state == FBSessionStateCreatedTokenLoaded) {

  // If there's one, just open the session silently, without showing the user the login UI
  [FBSession openActiveSessionWithReadPermissions:@[@"basic_info"]
                                     allowLoginUI:NO
                                completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
                                  // Handler for session state changes
                                  // This method will be called EACH time the session state changes,
                                  // also for intermediate states and NOT just when the session open
                                  [self sessionStateChanged:session state:state error:error];
                                }];

它向我显示了这样的错误----'AppDelegate'没有可见的@interface声明'sessionStateChanged:state:error:'
提前致谢...

Answer 1

根据上面的链接，您必须在您的应用程序委托(delegate)中添加此方法。但是您可以根据您的状态 View 自定义此方法(状态 == FBSessionStateOpen ...等)

// This method will handle ALL the session state changes in the app
- (void)sessionStateChanged:(FBSession *)session state:(FBSessionState) state error:(NSError *)error
{
  // If the session was opened successfully
  // customize your code...
}