从Facebook iOS 7获取用户名和个人资料图片

Question

我已经阅读了很多关于从Facebook获取信息的教程,但到目前为止我都失败了.我只是想从Facebook获取用户名和个人资料图片.

- (IBAction)login:(id)sender {

   [FBSession openActiveSessionWithReadPermissions:@[@"email",@"user_location",@"user_birthday",@"user_hometown"]
                                   allowLoginUI:YES
                              completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {

   switch (state) {
      case FBSessionStateOpen:
         [[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
            if (error) {
               NSLog(@"error:%@",error);
            } else {
               // retrive user's details at here as shown below
               NSLog(@"FB user first name:%@",user.first_name);
               NSLog(@"FB user last name:%@",user.last_name);
               NSLog(@"FB user birthday:%@",user.birthday);
               NSLog(@"FB user location:%@",user.location);
               NSLog(@"FB user username:%@",user.username);
               NSLog(@"FB user gender:%@",[user objectForKey:@"gender"]);
               NSLog(@"email id:%@",[user objectForKey:@"email"]);
               NSLog(@"location:%@", [NSString stringWithFormat:@"Location: %@\n\n",
                                                                         user.location[@"name"]]);

             }
        }];
        break;
        case FBSessionStateClosed:
        case FBSessionStateClosedLoginFailed:
           [FBSession.activeSession closeAndClearTokenInformation];
        break;
        default:
        break;
       }

   } ];


 }

我使用此代码获取信息,但我无法获取任何信息.你能帮我解决一下吗？或者你更喜欢阅读教程吗？我已经阅读了developer.facebook.com上的教程.

感谢您的关注.

Answer 1

这是我发现获取用户个人资料图片的最简单方法.

[[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *FBuser, NSError *error) {
    if (error) {
      // Handle error
    }

    else {
      NSString *userName = [FBuser name];
      NSString *userImageURL = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large", [FBuser objectID]];
    }
  }];

可以使用的其他查询参数是:

• 类型:小,普通,大,方形
• width:<value>
• height:<value>
  • 使用宽度和高度来获取裁剪的宽高比填充图像

Answer 2

if ([FBSDKAccessToken currentAccessToken]) {
    [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{ @"fields" : @"id,name,picture.width(100).height(100)"}]startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
        if (!error) {
            NSString *nameOfLoginUser = [result valueForKey:@"name"];
            NSString *imageStringOfLoginUser = [[[result valueForKey:@"picture"] valueForKey:@"data"] valueForKey:@"url"];
            NSURL *url = [[NSURL alloc] initWithURL: imageStringOfLoginUser];
            [self.imageView setImageWithURL:url placeholderImage: nil];
        }
    }];
}

Answer 3

进行以下Graph请求:

/me?fields=name,picture.width(720).height(720){url}

你会得到非常大而酷的个人资料图片:

{
  "id": "459237440909381",
  "name": "Victor Mishin", 
  "picture": {
    "data": {
      "url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-xpf1/t31.0-1/c628.148.1164.1164/s720x720/882111_142093815957080_669659725_o.jpg"
    }
  }
}

PS /me?fields=picture.type(large)不适合我.

Answer 4

您还可以获得如下的用户名和图片:

[FBSession openActiveSessionWithReadPermissions:@[@"basic_info"]
                                           allowLoginUI:YES
                                      completionHandler:
         ^(FBSession *session, FBSessionState state, NSError *error) {

             if(!error && state == FBSessionStateOpen) {
                 { [FBRequestConnection startWithGraphPath:@"me" parameters:[NSMutableDictionary dictionaryWithObjectsAndKeys:@"id,name,first_name,last_name,username,email,picture",@"fields",nil] HTTPMethod:@"GET" completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
                             NSDictionary *userData = (NSDictionary *)result;
                             NSLog(@"%@",[userData description]);
                         }];
                 }
             }
         }];

Output:
picture =     {
        data =         {
            "is_silhouette" = 0;
            url = "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-frc1/t5.0-1/xxxxxxxxx.jpg";
        };
    };
    username = xxxxxxxxx;

您可以将参数保留为图片和用户名,并根据您的要求排除其他参数.HTH.