apache-flex - 柔性 :datagrid sorting doesn't seem to work

Question

我正在使用 Flashbuilder 4.6，但无法对我的 s:DataGrid 中的列进行排序，单击列没有任何作用。任何人都可以提出什么问题吗？

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <s:DataGrid x="30" y="24" requestedRowCount="4" sortableColumns="true">
        <s:columns>
            <s:ArrayList>
                <s:GridColumn dataField="dataField1" headerText="Column 1"></s:GridColumn>
                <s:GridColumn dataField="dataField2" headerText="Column 2"></s:GridColumn>
                <s:GridColumn dataField="dataField3" headerText="Column 3"></s:GridColumn>
            </s:ArrayList>
        </s:columns>
        <s:typicalItem>
            <fx:Object dataField1="Sample Data" dataField2="Sample Data" dataField3="Sample Data"></fx:Object>
        </s:typicalItem>
        <s:ArrayList>
            <fx:Object dataField1="4" dataField2="c" dataField3="data1"></fx:Object>
            <fx:Object dataField1="2" dataField2="d" dataField3="data2"></fx:Object>
            <fx:Object dataField1="1" dataField2="a" dataField3="data3"></fx:Object>
            <fx:Object dataField1="3" dataField2="b" dataField3="data4"></fx:Object>
        </s:ArrayList>
    </s:DataGrid>

</s:Application>

Answer 1

这是因为您的 dataProvider 类型，您应该将其更改为 ArrayCollection。 ArrayList 基本上是 ArrayCollection 的“轻量级”版本，去除了排序和过滤功能，当您单击列时，DataGrid 在后台使用这些功能用于排序的标题。