php - 遍历 JSON NSDictionary

Question

我正在尝试用 PHP 以 JSON 格式打印 MySQL 结果集，并用 iOS 读取它。

这是我的 JSON 字符串:

[{"partnerid":"1","code":"SUMU6003","partnerName":"Company name","street":"Some Street 5323","zipCode":"8732","city":"Berlin","languages":"English","workers":"Name 1, Name 2","lineup":"Kids"},{"partnerid":"2","code":"DEMO8884","partnerName":"Partner 2","street":"Third street 2","zipCode":"383838","city":"Berlin","languages":"Greek","workers":"Petra","lineup":"Kids"}]

在这个方法中，我得到了NSDictionary:

#pragma mark - ServiceConnectorDelegate -

-(void)requestReturnedData:(NSData *)data { 
    NSDictionary *dictionary = [NSDictionary dictionaryWithJSONData:data];
    # process dictionary and grep strings from json-string
    # ...
}

你能告诉我如何在循环中访问不同的结果集吗？我想分别访问每个键。

我知道 NSDictionary 包含数据，因为 NSLog(@"%@",dictionary); 打印:

2012-12-20 19:13:20.661 myapp[576:907] (
        {
        city = Berlin;
        code = SUMU6003;
        languages = English;
        lineup = Kids;
        partnerName = "Company name";
        partnerid = 1;
        street = "Some Street 5323";
        workers = "Name 1, Name 2";
        zipCode = 8732;
    },
        {
        city = Berlin;
        code = DEMO8884;
        languages = Greek;
        lineup = Kids;
        partnerName = "Partner 2";
        partnerid = 2;
        street = "Third street 2";
        workers = Petra;
        zipCode = 383838;
    }
)

非常感谢您的帮助。

Answer 1

有时内省(introspection)在这里很有用。例如 NSLog(@"dictionary is of type: %@", [dictionary class]);

我这么说的原因是基于你的输出看起来字典实际上是一个包含两个 NSDictionaries 的数组。如果是这种情况，您会想要执行以下操作:

for (NSDictionary *actualDictionary in dictionary<this is really an array>)
{
  NSString *myStringValue = [actualDictionary objectForKey:@"city"];
  // etc...
}

不过，您必须首先找出实际处理的数据类型。