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移动数组集合中的元素-flex

actionscript-3 flex

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Immanuel · 技术社区 · 15 年前

有人能引导我在flex中移动数组集合中的元素吗?

我有一个排序对象的数组集合。

现在我需要将一行移动到arraycollection的末尾。

举例说明,

arrayCollection = ["Cars","Other","Trucks"];

此ArrayCollection已排序。现在我得走了 'Other' 到数组集合的结尾。也就是说,我需要将数组重组为

arrayCollection  = ["Cars","Trucks","Other"];

这是我的密码,

if(Index != -1){ 
CategoryList.addItem(CategoryList.removeItemAt(Index)); 
trace(CategoryList.source.join());}

“CategoryList”是长度为28的ArrayCollection,ArrayCollection中的每个对象都有3个属性。

“removeitem”工作正常,但“additem”抛出此错误,

RangeError:指定的索引“28”超出界限。在mx.collections::arraylist/additemat()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\arraylist.as:305] 在mx.collections::listcollectionview/additemat()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:501] 在mx.collections::listcollectionview/additem()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:470] AT组件::home/creationover()[C:\documents and settings\immanuel\my documents\flex builder 3\porj\src\components\home.mxml:113] AT组件::home/uuuuhome_Canvas1_creationcomplete()[C:\documents and settings\immanuel\my documents\flex builder 3\porj\src\components\home.mxml:2] 在flash.events::EventDispatcher/DispatcheventFunction()时在flash.events::EventDispatcher/Dispatchevent()时在mx.core::uicomponent/dispatchevent()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:9298] at mx.core::uicomponent/set initialized()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:1169] 在mx.managers::layoutmanager/dophasedinstantiation()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\managers\layoutmanager.as:718] 在函数/ http://adobe.com/AS3/2006/builtin::apply() 在mx.core::uicomponent/callLaterDispatcher2()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:8628] 在mx.core::uicomponent/callLaterDispatcher()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:8568]

然后我试着在一个特定的位置插入,

CategoryList.addItemAt(CategoryList.removeItemAt(Index), CategoryList.length-1);

但是这个,抛出了下面的错误,

类型错误:错误1006:值不是函数。在mx.collections::listcollectionview/getfiltereditemindex()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:564] 在mx.collections::listcollectionview/additemstoview()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:896] 在mx.collections::listcollectionview/listchangehandler()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:1051] 在flash.events::EventDispatcher/DispatcheventFunction()时在flash.events::EventDispatcher/Dispatchevent()时在mx.collections::arraylist/internalDispatchEvent()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\arraylist.as:510] 在mx.collections::arraylist/additemat()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\arraylist.as:311] 在mx.collections::listcollectionview/additemat()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\collections\listcollectionview.as:501] AT组件::home/creationover()[C:\documents and settings\immanuel\my documents\flex builder 3\porj\src\components\home.mxml:113] AT组件::home/uuuuhome_Canvas1_creationcomplete()[C:\documents and settings\immanuel\my documents\flex builder 3\porj\src\components\home.mxml:2] 在flash.events::EventDispatcher/DispatcheventFunction()时在flash.events::EventDispatcher/Dispatchevent()时在mx.core::uicomponent/dispatchevent()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:9298] at mx.core::uicomponent/set initialized()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:1169] 在mx.managers::layoutmanager/dophasedinstantiation()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\managers\layoutmanager.as:718] 在函数/ http://adobe.com/as3/2006/builtin::apply()。在mx.core::uicomponent/callLaterDispatcher2()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:8628] 在mx.core::uicomponent/callLaterDispatcher()[c:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\uicomponent.as:8568]

1 回复 | 直到 15 年前

1

3

Amarghosh 15 年前

var array:Array = ["Cars", "Other", "Trucks"];
pushToEnd(array, 1);

trace(array.join()); //Cars,Trucks,Other

/**
* Removes the item at 'index' and pushes it to the back of the array.
*/

function pushToEnd(array:Array, index:Number):void
{
  array.push(array.splice(index, 1)[0]);
}

使用 ArrayCollection

arrayCol.addItem(arrayCol.removeItemAt(index));

更新:工作样本-自己看看。

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" 
    creationComplete="create();">
    <mx:Button label="push" click="handle();"/>
    <mx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;

            private var ac:ArrayCollection;

            private function handle():void
            {
                ac.addItem(ac.removeItemAt(1));
                trace(ac.source.join());
            }

            private function create():void
            {
                ac = new ArrayCollection(["asd", "qwe", "zxc", "123"]);
                trace(ac.source.join());
            }
        ]]>
    </mx:Script>
</mx:Application>