AS3从PHP解码JSON数据的问题

I am able to pull JSON data from PHP into my Flex application just fine with the following bit of code:

我可以使用以下代码将JSON数据从PHP中提取到我的Flex应用程序中:

public function httpResult(event:ResultEvent):void { 
    var rawData:String = String(event.result);
    trace(String(event.result)); //shows correct order
    var as3Data:Object = JSON.decode(rawData);

    for (var i:* in as3Data)  {
        trace(i + ": " + as3Data[i].unit_price); //shows incorrect order
    }
}

When I trace the result, I see the information I am pulling in the correct order.

当我追踪结果时,我会看到正在按正确顺序提取的信息。

{"100":{"unit_price":"2.9567"},"400":{"unit_price":"1.0991"},"800":{"unit_price":"0.7926"},"1200":{"unit_price":"0.6911"}} {

But, once I JSON.decode the result, somehow it re-orders the content. And, puts the first item last.

但是,一旦我JSON.decode结果,它会以某种方式重新排序内容。并且,将第一项放在最后。

400: 1.0991, 800: 0.7926, 1200: 0.6911, 100: 2.9567

400:1.0991,800:0.7926,1200:0.6911,100:2.9567

Does anyone have any ideas on why it would be doing this? Or ideas on how I can re-order the Object myself?

有没有人对为什么会这样做有任何想法?或者我如何自己重新订购Object的想法?

2 个解决方案

#1

Objects in AS3 aren't ordered. JSON key-value pairs obviously do have an ordering (it's in the text!), but I don't think there's any guarantee it'll be kept when the JSON is either encoded or decoded.

AS3中的对象未订购。 JSON键值对显然有一个排序(它在文本中!),但我不认为在JSON编码或解码时会保留它。

If you've got specific ordering requirements, you should probably create a list with objects in it:

如果您有特定的订购要求,您应该创建一个包含对象的列表:

[
    {"100":{"unit_price":"2.9567"}},
    {"400":{"unit_price":"1.0991"}},
    {"800":{"unit_price":"0.7926"}},
    {"1200":{"unit_price":"0.6911"}}
]

#2

For the most part Andrew's answer is right on, because yeah objects in AS3 aren't ordered. However I wouldn't create a list of objects; rather I would create a list of keys used to index into the JSON object. That way it's easy to sort the list of keys.

在大多数情况下,安德鲁的回答是正确的,因为AS3中的对象不是有序的。但是我不会创建对象列表;相反,我会创建一个用于索引到JSON对象的键列表。这样就很容易对键列表进行排序。

The code for what I'm getting at is something like:

我得到的代码是这样的:

var as3Data:Object = JSON.decode(rawData);
var keys:Array = [];

for (var i:* in as3Data)  {
  keys.push(i);
}

keys.sort();  //don't know the correct sort off the top of my head, sorry

for (var key:* in keys) {
  trace(key + ":" + as3Data[key].unit_price);
}

#1