Ios 使用facebook sdk启动ForUploadPhoto时，此服务器的证书无效错误

我的代码如下：

    [FBRequestConnection startForUploadPhoto:[UIImage imageNamed:@"1.png"] 
        completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
    if (error) {
          NSLog(@"%@",error);
     }
    }];

错误是：

Error Domain=com.facebook.sdk Code=5 "The operation couldn’t be completed. (com.facebook.sdk error 5.)" UserInfo=0x933e390 {com.facebook.sdk:ErrorInnerErrorKey=Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “graph.facebook.com” which could put your confidential information at risk." UserInfo=0x9338700 {NSErrorFailingURLStringKey=https://graph.facebook.com/me/photos?sdk=ios&access_token=BAAEPZAb5iLukBADkyh9M8guUFRJwXuGKI6HnZAZAwMvpQtv3RKsD6M62J4inW1oG8DmY5l81pIz4MhcRHMbLsUAlxEqWq557pYCHXqoF9Gv3FdRTrV9Ai3QuL6zBeM7OoSWvOKlFt1fZAx5h0wkh&migration_bundle=fbsdk%3A20121003&format=json, NSLocalizedRecoverySuggestion=Would you like to connect to the server anyway?, NSErrorFailingURLKey=https://graph.facebook.com/me/photos?sdk=ios&access_token=BAAEPZAb5iLukBADkyh9M8guUFRJwXuGKI6HnZAZAwMvpQtv3RKsD6M62J4inW1oG8DmY5l81pIz4MhcRHMbLsUAlxEqWq557pYCHXqoF9Gv3FdRTrV9Ai3QuL6zBeM7OoSWvOKlFt1fZAx5h0wkh&migration_bundle=fbsdk%3A20121003&format=json, NSLocalizedDescription=The certificate for this server is invalid.You might be connecting to a server that is pretending to be “graph.facebook.com” which could put your confidential information at risk., NSUnderlyingError=0xa32e810 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “graph.facebook.com” which could put your confidential information at risk.", NSURLErrorFailingURLPeerTrustErrorKey=}, com.facebook.sdk:HTTPStatusCode=200} 错误域=com.facebook.sdk代码=5“操作无法完成。（com.facebook.sdk错误5）” UserInfo=0x933e390{com.facebook.sdk:ErrorInnerErrorKey=ErrorDomain=NSURlerErrorDomain代码=-1202 “此服务器的证书无效。您可能正在连接到一个假装是的服务器 “graph.facebook.com”，这可能会使您的机密信息面临风险。” UserInfo=0x9338700{NSErrorFailingURLStringKey=https://graph.facebook.com/me/photos?sdk=ios&access_token=BAAEPZAb5iLukBADkyh9M8guUFRJwXuGKI6HnZAZAwMvpQtv3RKsD6M62J4inW1oG8DmY5l81pIz4MhcRHMbLsUAlxEqWq557pYCHXqoF9Gv3FdRTrV9Ai3QuL6zBeM7OoSWvOKlFt1fZAx5h0wkh&migration_bundle=fbsdk%3A20121003&format=json, nsLocalizedRecoverysSuggestion=是否仍要连接到服务器？， N错误失效键=https://graph.facebook.com/me/photos?sdk=ios&access_token=BAAEPZAb5iLukBADkyh9M8guUFRJwXuGKI6HnZAZAwMvpQtv3RKsD6M62J4inW1oG8DmY5l81pIz4MhcRHMbLsUAlxEqWq557pYCHXqoF9Gv3FdRTrV9Ai3QuL6zBeM7OoSWvOKlFt1fZAx5h0wkh&migration_bundle=fbsdk%3A20121003&format=json, NSLocalizedDescription=此服务器的证书无效。您可能正在连接假装为“graph.facebook.com”的服务器，这可能会使您的机密信息面临风险。， NSUnderlyingError=0xa32e810“此服务器的证书无效。您可能正在连接到服务器。” 假装是“graph.facebook.com”的服务器，可能会将您的机密信息置于危险之中， NsurErrorFailingUrlPeerTrustErrorKey=}，com.facebook.sdk:HTTPStatusCode=200}

---

我该怎么解决呢？

我终于改变了我的网络，它开始工作了。