iphone - 如何检查 ios 中的 json 响应中的 key 是否可用

Question

在我向服务器请求之后，我收到了两种不同类型的响应

如果成功响应就是这个

[{"id":5,"is_default":0,"name":"Dutch","language_id":3},{"id":4,"is_default":1,"name":"French","language_id":2}]

其他响应类型是

 {"status":102,"response":"Empty record list."}

是否有任何方法可以检测“状态”键是否可用以响应 objc. 谢谢

找到解决方案

   //break it from result tag    
if([[responseString JSONValue] isKindOfClass:[NSDictionary class]]){

    NSDictionary *dict = [responseString JSONFragmentValue];

    if([dict count]==2){
      return;
    }
    //nothing to load

}

Answer 1

响应只是一个字典，所以要查看您是否有您正在寻找的键，您可以使用 NSDictionary 方法:

// Assume you have already created a dictionary, jsonResponse, from your JSON

// First, get all the keys in the response

NSArray *responseKeys = [jsonResponse allKeys];

// Now see if the array contains the key you are looking for

BOOL isErrorResponse = [responseKeys containsObject:@"status"];