Facebook SDK 3.0：如何接收用户的电子邮件？ [英] Facebook SDK 3.0: how to receive user's e-mail?

问题描述

  NSMutableDictionary * params = [NSMutableDictionary字体大小：
 @select uid，name，email，pic FROM user WHERE uid = me（），@query，
 nil]; 
 
 JBFacebookManager * fbManager = [JBFacebookManager getInstance]; 
 fbManager.requestDelegate = self; 
 
 [fbManager.facebook requestWithMethodName：@fql.query
 andParams：params 
 andHttpMethod：@POST
 andDelegate：self]; 
  

如何使用新的FB iOS SDK 3.0进行此操作？我需要使用 FBRequest 或 FBOpenGraphAction 或 FBGraphObject 或那些还是完全不一样的组合？

解决方案

  if（FBSession.activeSession.isOpen ）{
 [[FBRequest requestForMe] startWithCompletionHandler：^（FBRequestConnection * connection，NSDictionary< FBGraphUser> * user，NSError * error）{
 if（！error）{
 self.nameLabel.text = user.name; 
 self.emailLabel.text = [user objectForKey：@email]; 
} 
}]; 
} 
  

因为 FBGraphUser 没有电子邮件 @property ，我们无法使用名称（点 - 语法）访问信息，但是NSDictionary仍然有电子邮件kv对，我们可以访问它，就像我们将使用正常的NSDictionary。

不要忘记要求电子邮件权限：

  NSArray * permissions = [[NSArray alloc] initWithObjects：@email，nil]; 
 [FBSession sessionOpenWithPermissions：permissions completionHandler：
 ^（FBSession * session，FBSessionState state，NSError * error）{
 [self facebookSessionStateChanged：session state：state error：error]; 
}]; 
  

In the "old" FB iOS SDK I could receive user information via the following:

NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   @"SELECT uid, name, email, pic FROM user WHERE uid=me()", @"query",
                                   nil];

    JBFacebookManager *fbManager = [JBFacebookManager getInstance];
    fbManager.requestDelegate = self;

    [fbManager.facebook requestWithMethodName:@"fql.query"
                                     andParams:params
                                 andHttpMethod:@"POST"
                                   andDelegate:self];

How can I do this with the new FB iOS SDK 3.0? Do I need to use FBRequest or FBOpenGraphAction or FBGraphObject or a combination of those or something completely different?

解决方案

if (FBSession.activeSession.isOpen) {
    [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
         if (!error) {
             self.nameLabel.text = user.name;
             self.emailLabel.text = [user objectForKey:@"email"];
         }
     }];
}

Because FBGraphUser doesn't have an email @property, we can't access the information like with the name (dot-syntax), however the NSDictionary still has the email kv-pair and we can access it like we would do with a normal NSDictionary.

Don't forget to ask for the email permission though:

NSArray *permissions = [[NSArray alloc] initWithObjects:@"email", nil];
[FBSession sessionOpenWithPermissions:permissions completionHandler:
 ^(FBSession *session, FBSessionState state, NSError *error) {
     [self facebookSessionStateChanged:session state:state error:error];
 }];

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