在 Flex 中对 ArrayCollection 进行排序 [英] Sorting an ArrayCollection in Flex

问题描述

在 Flex 中有什么方法可以让我们根据字符串对数组集合进行排序.

Is there any way in Flex where in we can sort an arraycollection based on strings .

我有一个数据提供程序，其中包含诸如关键"高"中"低"之类的字符串我需要对其进行排序，以便我需要将关键显示在顶部，然后显示下一个高、中和低.

I have a dataprovider with strings like "Critical" "High" "Medium" "Low" where in I need to sort it in such a way that I need Critical to be displayed on the top and next High , Medium and Low follows.

谁能告诉我任何逻辑.

谢谢，库马尔

推荐答案

ArrayCollection 是 ListCollectionView 的子类，具有 sort 财产.Sort 类有一个 compareFunction property 可用于定义自定义排序函数.

ArrayCollection is a subclass of ListCollectionView that has a sort property. The Sort class has a compareFunction property that you can use to define custom sort functions.

private function sortFunction(a:Object, b:Object, array:Array = null):int
{
   //assuming that 'level' is the name of the variable in each object 
   //that holds values like "Critical", "High" etc
   var levels:Array = ["Low", "Medium", "High", "Critical"];
   var aLevel:Number = levels.indexOf(a.level);
   var bLevel:Number = levels.indexOf(b.level);
   if(aLevel == -1 || bLevel == -1)
      throw new Error("Invalid value for criticality ");
   if(aLevel == bLevel)
      return 0;
   if(aLevel > bLevel)
      return 1;
   return -1;
}
var sort:Sort = new Sort();
sort.compareFunction = sortFunction;
arrayCollection.sort = sort;
arrayCollection.refresh();

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