从json数组中的嵌套NSDictionary中提取数据

Question

我有一个json数组，我正在尝试从中提取数据。该数组是使用NSJSONSerialization创建的。这是json数组从NSLog看起来的样子（[jsonArray debugDescription]）;：

{
    properties =     (
                {
            ID = 12345;
            PropertyName = "McDonalds";
            key = 00112233445566778899aabbccddeeff;
        },
                {
            ID = 12346;
            PropertyName = "Taco Bell";
            key = 00112233445566778899aabbccddeef0;
        },
                {
            ID = 12347;
            PropertyName = "Burger King";
            key = 00112233445566778899aabbccddeef1;
        }
    );
    success = 1;
    totalCount = 3;
}

我需要提取每个ID和每个Property name，并将值转储到单独的数组中。我怎么能这样做？

Answer 1

您可以使用键值编码：

NSArray *ids = [jsonArray valueForKeyPath:@"properties.ID"];
NSArray *propertyNames = [jsonArray valueForKeyPath:@"properties.PropertyName"];