将事件侦听器添加到多维数组

Question

我想知道在actionscript3中是否可以循环遍历多维数组并添加事件监听器，如果可以，我的方法是否正确？

var localSegment:Array = [segment1.system_Cab, segment1.programs_Cab, segment1.userFiles_Cab, segment1.rollback_Cab]
var external_MediaSegment:Array = [segment2.externalHD_Cab, segment2.virtualDisk_Cab]
var network_LocationSegment:Array = [segment3.homeServer_Cab, segment3.wifiFlashdrive_Cab, segment3.encrivaPlay_Cab]
var superVolumes:Array = [localSegment, external_MediaSegment, network_LocationSegment]

for (var i:Number = 0; i < superVolumes.length; i++ ){
    var fmCabinent = superVolumes[i];
    fmCabinent.addEventListener(MouseEvent.CLICK, openCabinet);
}

var targetCabinent;

function openCabinet (e:MouseEvent):void{
    targetCabinent = e.currentTarget;
    if (targetCabinent.currentFrame == 1){
        targetCabinent.play();
}

Answer 1

您不能将点击侦听器添加到数组。

查看您的代码，您循环遍历外部数组 superVolumes，并尝试为其成员添加点击侦听器，但它的所有成员也是数组。

您可以做的是嵌套循环（循环中的循环）并将侦听器添加到这些子数组中可能显示的对象。

for (var i:int = 0; i < superVolumes.length; i++ ){
    for(var j:int = 0; j < superVolumes[i].length; j++){
        superVolumnes[i][j].addEventListener(MouseEvent.CLICK, openCabinet);
    }
}

要确定点击的对象属于哪个数组，您可以在点击处理程序中执行如下操作：

//create a var to reference the clicked item's parent array
var arrayContainer:Array;

//a temporary variable to store the index of clicked object
var curIndex:int;

//loop through the superVolumes array
for (var i:int = 0; i < superVolumes.length; i++ ){

    //see if the sub array contains the clicked item
    curIndex = superVolumes[i].indexOf(e.currentTarget);

    //indexOf returns -1 if the item is not found in the array

    if(curIndex > -1){
        //if the sub array contains the clicked item (e.currentTarget)
        arrayContainer = superVolumes[i][curIndex];
        break; //stop looping since you found the array
    }
}

//now do whatever you need to do with the array
switch(arrayContainer){
    case localSegment:
        trace("You clicked an item from local segment");
        break;

    case external_MediaSegment:
        trace("YOu clicked something from media segment");
        break;

    default:
        trace("You clicked something from network_LocationSegment");
}

关于理解上面的[j]代表什么，你可以改写成这样更清楚：

for (var iterator:int = 0; iterator < superVolumes.length; iterator++ ){
    //the members of superVolumes are all arrays
    //get the sub array at current index ('iterator') and assign it to a variable
    var curArray:Array = superVolumes[iterator] as Array;

    //now loop through this sub array
    //since we have 'iterator' (previously 'i') as the iterator/index name in the outer loop
    //we need a different name for the iterator on the inner loop
    //let's call this iterator 'innerIterator' (previously 'j')
    for(var innerIterator:int = 0; innerIterator < curArray.length; innerIterator++){
        curArray[innerIterator].addEventListener(MouseEvent.CLICK, openCabinet);
    }
}

将事件侦听器添加到多维数组

Adding event listener to a multidimensional array

actionscript-3