在iOS上使用最新的SDK登錄Facebook的問題

Question

我正在使用臉書登錄實施應用程序。我需要訪問用戶「公開個人資料」，以及「電子郵件ID」也。這裏電子郵件ID是必須的。我可以登錄，但在輸入登錄詳細信息後，它會顯示審查頁面，在該審閱頁面中顯示「您提供的編輯信息」按鈕，在這裏我正面臨問題。我在這裏有2個疑問1）是否可以禁用「編輯您提供的信息」選項（或）2）是否可以禁用用戶交互電子郵件字段，如公共配置文件。我的代碼在下面。

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

    [self toggleHiddenState:YES]; 
    self.lblLoginStatus.text = @""; 

    self.loginButton.delegate = self; 
    self.loginButton.readPermissions = @[@"public_profile",@"email"]; 
} 
#pragma mark - Private method implementation 

-(void)toggleHiddenState:(BOOL)shouldHide{ 
    self.lblUsername.hidden = shouldHide; 
    self.lblEmail.hidden = shouldHide; 
    self.profilePicture.hidden = shouldHide; 
} 


#pragma mark - FBLoginView Delegate method implementation 

-(void)loginViewShowingLoggedInUser:(FBLoginView *)loginView{ 
    self.lblLoginStatus.text = @"You are logged in."; 

    [self toggleHiddenState:NO]; 
} 


-(void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user{ 
    NSLog(@"%@", user); 
    self.profilePicture.profileID = user.id; 
    self.lblUsername.text = user.name; 
    self.lblEmail.text = [user objectForKey:@"email"]; 
} 


-(void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView{ 
    self.lblLoginStatus.text = @"You are logged out"; 

    [self toggleHiddenState:YES]; 
} 


-(void)loginView:(FBLoginView *)loginView handleError:(NSError *)error{ 
    NSLog(@"%@", [error localizedDescription]); 
} 

Answer 1

據我從文檔中developers.facebook.com讀的第一和第二疑問，答案是否定的，用戶可以撤銷的許可，甚至在他給了允許最初，它是從Facebook添加的安全功能。你可以做的是檢查授予你什麼許可：

[FBRequestConnection startWithGraphPath:@"/me/permissions" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) { 
__block NSString *alertText; 
__block NSString *alertTitle; 
if (!error){ 
    // Walk the list of permissions looking to see if email has been granted 
    NSArray *permissions = (NSArray *)[result data]; 
    BOOL emailPermission = FALSE; 
    for (NSDictionary *perm in permissions) { 
     if ([[perm objectForKey:@"permission"] isEqualToString:@"email"] && 
      [[perm objectForKey:@"status"] isEqualToString:@"granted"]) { 
      emailPermission = TRUE; 
      NSLog(@"email granted."); 
      break; 
     } 
}