AFNetWorking获取errorData

NSDictionary *UserInfo = error.userInfo;

NSHTTPURLResponse * responses = UserInfo[@"com.alamofire.serialization.response.error.response"];

NSDictionary *errorDict = [NSJSONSerializationJSONObjectWithData:UserInfo[@"com.alamofire.serialization.response.error.data"] options:NSJSONReadingMutableContainers error:nil];

NSString *errorStr = errorDict[@"Message"];