ActionScript多個對象實例化hitTestPoint

我遇到的問題基本上是，我在舞臺上實例化了'Target'對象五次。發生這種情況，但只有一個對象能夠在其上執行hitTestPoint。任何人都可以幫助爲什麼發生這種情況？ActionScript多個對象實例化hitTestPoint

下面是代碼：

修訂

package { 

import flash.display.Sprite; 
import flash.events.MouseEvent; 
import flash.ui.Mouse; 
import flash.text.*; 

public class TheGameItself extends Sprite { 

    public var main_class:TheGame; 
    private var crosshair:Crosshair = new Crosshair; 
    private var targets:Array = new Array(); 

    public function TheGameItself(passed_class:TheGame) { 

     main_class = passed_class; 

     addTargets(4); 

     Mouse.hide(); 
     addChild(crosshair); 
     crosshair.x = mouseX; 
     crosshair.y = mouseY; 
     addEventListener(MouseEvent.MOUSE_MOVE, moveCrosshair); 
    } 

    private function addTargets(numOfTargets:int):void { 
     for (var i:int = 0; i < numOfTargets; ++i) { 
      targets[i] = new Target; 
      targets[i].x = 100 * i + 70; 
      targets[i].y = 100; 
      targets[i].scaleX = targets[i].scaleY = .7; 
      addChild(targets[i]); 
      addEventListener(MouseEvent.CLICK, collisionDetection); 
     } 
    } 

    private function collisionDetection(e:MouseEvent):void { 
     targets.forEach(detectCollision); 
    } 

    private function detectCollision(element:*, index:int, targets:Array):void { 
     if (element.hitTestPoint(mouseX, mouseY, true) && targets.length > 0) { 
      trace("["+index+"]"+" "+element); 
      collisionNotification.text = "Yes"; 
     } else { 
      collisionNotification.text = "No"; 
     } 
    } 

    public function moveCrosshair(e:MouseEvent):void { 
     crosshair.x = mouseX; 
     crosshair.y = mouseY; 
    } 

} 

}

來源

2011-05-20 davo0105

你的目標添加到一個數組來保持的，然後跟蹤：

private function target:Array = new Array(); 

private function newTarget(numOfTargets:uint):void { 
     for (var i:int = 0; i < numOfTargets; i++) { 
      target[i] = new Target; 
      target[i].x = 100 * i + 70; 
      target[i].y = 100; 
      target[i].scaleX = target[i].scaleY = .7; 
      addChild(target[i]); 
      trace(target[i]); // Adds 5 objects to stage 

      //**updated** 
      target[i].addEventListener(MouseEvent.CLICK, collisionDetection); 
     } 
}

現在你可以請參閱各目標：

private function collisionDetection(e:MouseEvent):void { 

var target:MovieClip = MovieClip(e.target); //**updated** 

     if (target.hitTestPoint(mouseX, mouseY, true)) { 
      collisionNotification.text = "Collision"; 
      removeTarget(); 
      currentScore.text = String(int(score)); 
     } else { 
      collisionNotification.text = "No collision"; 
      decreaseScore(); 
      currentScore.text = String(int(score)); 
      // Check if score is equal to -200 and if it is, show game over screen 
      if (score == -500) { 
       Mouse.show(); 
       main_class.showGameOver(); 
      } 
     } 
    }

來源

2011-05-20 07:33:11 nelsond8

感謝您的幫助 - 但它似乎沒有工作。我瞭解您的示例中發生了什麼，但問題依然存在。只有一個對象是鼠標點擊的，其餘的則沒有反應。 – davo0105 2011-05-20 17:04:28

我的猜測是，你只是添加一個事件來處理所有的目標，正確的方法是在循環中的每個目標添加一個事件。我編輯我以前的代碼，看看我標記爲// **更新** – nelsond8 2011-05-21 09:56:46

這些是我對這個問題的初步想法，我只在第一個對象上聽到hitTestPoint事件，而不是全部。我試過你的更新解決方案，但無濟於事。我已經實現了您的原始解決方案，並將其添加到試圖解決我的問題。我已經更新了原始問題中的代碼。看看它，看看你的想法。 – davo0105 2011-05-22 11:59:41

ActionScript多個對象實例化hitTestPoint

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