在iOS上使用最新的SDK登录Facebook的问题

Question

我正在使用脸书登录实施应用程序。我需要访问用户“公开个人资料”，以及“电子邮件ID”也。这里电子邮件ID是必须的。我可以登录，但在输入登录详细信息后，它会显示审查页面，在该审阅页面中显示“您提供的编辑信息”按钮，在这里我正面临问题。我在这里有2个疑问1）是否可以禁用“编辑您提供的信息”选项（或）2）是否可以禁用用户交互电子邮件字段，如公共配置文件。我的代码在下面。

- (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

据我从文档中developers.facebook.com读的第一和第二疑问，答案是否定的，用户可以撤销的许可，甚至在他给了允许最初，它是从Facebook添加的安全功能。你可以做的是检查授予你什么许可：

[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; 
     } 
}