获取用户信息

获取用户信息分为两个步骤：
首先，发送获取用户信息的请求；

[_tencentOAuth getUserInfo])

其中，_tencentOAuth为TencentOAuth类的实例。
其次，实现协议TencentSessionDelegate的获取到用户信息后的回调方法：

//可以通过response获取数据的返回结果 - (void)getUserInfoResponse:(APIResponse*) response;

下面以显示所有信息为例，进行说明：

- (void)getUserInfoResponse:(APIResponse*) response {     if (URLREQUEST_SUCCEED == response.retCode && kOpenSDKErrorSuccess == response.detailRetCode) {         NSMutableString *str = [NSMutableString stringWithFormat:@""];         for (id key in response.jsonResponse) {             [str appendString: [NSString stringWithFormat: @"%@:%@\n", key, [response.jsonResponse objectForKey:key]]];         }         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"操作成功" message: [NSString stringWithFormat:@"%@",str] delegate:self cancelButtonTitle:@"我知道啦" otherButtonTitles: nil];         [alert show];     } else {         NSString *errMsg = [NSString stringWithFormat:@"errorMsg:%@\n%@", response.errorMsg, [response.jsonResponse objectForKey:@"msg"]];         UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"操作失败" message:errMsg delegate:self cancelButtonTitle:@"我知道啦" otherButtonTitles: nil];         [alert show];     } }