如何從位圖數據（從數組）獲取位圖圖像的索引？

Question

我想知道如果我有一個數組推動是位圖的內容，我怎麼得到點擊時特定圖像的索引。我試圖使用indexOf但沒有運氣，我的代碼如下。 感謝您的時間！

代碼：

//First Part is where i add the URLRequest and add the image into contentHolder then onto Stage 
function loadImage():void { 
    for(var i:int = 5; i < somedata.length; i++){ 
     if(somedata[i]){ 
      var loader:Loader = new Loader(); 
      loader.load(new URLRequest("http://www.rentaid.info/rent/"+somedata[i])); 
      loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onImageLoaded); 

     } 
    } 
} 


function onImageLoaded(e:Event):void { 
    loadedArray.push(e.target.content as Bitmap); 

    for(var i:int = 0; i < loadedArray.length; i++){ 
     var currentY1:int = 200; 

     e.currentTarget.loader.content.height =200; 
     e.currentTarget.loader.content.y += currentY1; 
     currentY1 += e.currentTarget.loader.content.height +300; 
     _contentHolder.mouseChildren = false; // ignore children mouseEvents 
     _contentHolder.mouseEnabled = true;  // enable mouse on the object - normally set to true by default 
     _contentHolder.useHandCursor = true;  // add hand cursor on mouse over 
     _contentHolder.buttonMode = true; 

     _contentHolder.addChild(loadedArray[i]); 
     addChild(_contentHolder); 
     _contentHolder.addEventListener(MouseEvent.CLICK, gotoscene); 
    } 
} 

// then the part where i try to get the index 
function gotoscene(e:MouseEvent):void { 
    var index:Number; 
    index = loadedArray.indexOf(e.target); 
    trace(index); 
} 

編輯：

var viewport:Viewport = new Viewport(); 

    viewport.y = 0; 

    viewport.addChild(_contentHolder); 

Answer 1

你的第一個問題很簡單的答案：

var image:Bitmap = new Bitmap(); 
var images:Array = new Array(image); 

for (var i:uint = 0; i < images.length; i++) { 
    // images[i].bitmapData is the original image in your array 
    // image.bitmapData is searched one 
    if (images[i].bitmapData == image.bitmapData) { 
     // found 
    } 
} 

但你的問題是比這更大。我看到你繼續四處遊蕩..

你應該爲每個孩子添加監聽器，而不是內容持有者。我通常不使用Loaders，而是獲取他們的Bitmap，並將它們包裝在Sprites或其他東西中，我將它們添加到場景中。您應該將此Sprite或您的Loader存儲到該數組中，而不是位圖。然後將偵聽器添加到它們中的每一個（Sprite或Loader，而不是Bitmap）並獲取目標。根據您存儲在數組中的東西，你可以很容易地得到它爲：

function gotoscene(e:MouseEvent):void { 
    var index:uint = loadedArray(indexOf(e.target)); 
} 

但是存儲一個特定類型實際上是點擊是很重要的。不要考慮位圖 - 它只是一個圖形表示，並且在代碼中沒有太多工作。

**編輯： 好吧我加入的代碼，你需要而是要了解你在做什麼是非常重要的，而不是僅僅依靠別人的答案:)

function onImageLoaded(e:Event):void { 
    var bitmap:Bitmap = e.target.content as Bitmap; // get the Bitmap 

    var image:Sprite = new Sprite(); 
    image.addChild(bitmap); // wrap it inside new Sprite 

    // add listener to Sprite! 
    image.addEventListener(MouseEvent.CLICK, gotoscene); 

    // gets url of current image (http://website.com/images/image1.jpg) 
    var url:String = e.target.loaderURL; 

    // get only the number from that url by replacing or by some other way 
    // this removes the first part and results in "1.jpg" 
    var name:String = url.replace("http://website.com/images/image", ""); 
    // this removes the extension and results in number only - 1, 2, 3 
    // it's important to change this depending on your naming convention 
    name = name.replace(".jpg", ""); 
    image.name = "button" + name; // results in "button1", "button2", "button3" 

    // store object, name, or whatever (not really needed in your case, but commonly used) 
    loadedArray.push(image.name); 

    image.x = counter * 100; // position so you can see them, at 100, 200, 300, etc. 
    _contentHolder.addChild(image); // add newly created Sprite to content 
} 

function gotoscene(e:MouseEvent):void { 
    var name:String = e.target.name; 

    // strips down "button" from "button1", and only the number remains, 
    // which is 1, 2, 3, etc. the number of the scene :) 
    var scene:uint = name.replace("button", ""); 

    // you're the man now :) 
}