Flex Mobile actionscript如何按对象的一部分按字母顺序对arrayCollection进行排序

Question

我有一个来自 db 的查询，它作为对象的 ArrayCollection 返回。我想按对象的一个​​属性按字母顺序排序。从 db.queryResults() 回来，对象的属性名称是 DmvValue3。我该如何排序。下面是我的代码和 ArrayCollection 中属性的屏幕截图。

        private function sortCollection(list:ArrayCollection):ArrayCollection
        {
            var sort:ISort = new Sort();
            var sortField:SortField = new SortField(null, true);
            sortField.setStyle("locale", "en-US");
            sort.fields = [sortField];
            list.sort = sort;
            list.refresh();
            return list;
        }

Answer 1

这是未经测试的代码，但它应该能让你走上正确的道路。

private function sortCollection(list:ArrayCollection):ArrayCollection {
    var sort:ISort = new Sort(); 
    var sortField:SortField = new SortField(); 
    sortField.name = "DmvValue3"; 
    sortField.caseInsensitive = true; 
    sortField.numeric = true; 
    sortField.descending = true; 

    sort.fields = [sortField]; 

    list.sort = sort; 
    list.refresh(); 

    return list;
} 

[更新]

    private function sortCollection(list:ArrayCollection):ArrayCollection {
        var sort:ISort = new Sort(); 
        var sortField:SortField = new SortField(); 
        //sortField.name = "DmvValue3"; 
        //sortField.caseInsensitive = true; 
        ////sortField.numeric = true; 
        //sortField.descending = true; 

        //sort.fields = [sortField]; 
        sort.compareFunction = myCompare;
        list.sort = sort; 
        list.refresh(); 

        return list;
    }
    public function myCompare(a:Object, b:Object, fields:Array = null):int {
        if(a["DmvValue3"] < b["DmvValue3"] )
            return -1; // -1, if a should appear before b in the sorted sequence
        if(a["DmvValue3"] == b["DmvValue3"] )
            return 0; // 0, if a equals b
        if(a["DmvValue3"] > b["DmvValue3"] )
            return 1; // 1, if a should appear after b in the sorted sequence
    }