Mouse Events for objects in an array in Flash
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21-12-2019 - |
Question
I am not sure how to make this clear but : Is there a way to allow mouse event register with objects in an array? I have multiple objects being added to stage from an array and i would like to call different functions after said objects are clicked on ? I have this:
function makeEnemies():void
{
//create humans
var tempEnemy:MovieClip;
var wolf:MovieClip;
tempEnemy = new Enemy2();
tempEnemy.cacheAsBitmap = true;
tempEnemy.speed = 20;
tempEnemy.x = Math.round(Math.random() * 800);
tempEnemy.y = Math.round(Math.random() * 480);
addChild(tempEnemy);
enemies.push(tempEnemy);
}
function moveEnemies():void
{
var tempEnemy:MovieClip;
for (var i:int =enemies.length-1; i>=0; i--)
{
tempEnemy = enemies[i];
if (tempEnemy.x > stage.stageWidth)
{
tempEnemy.x = stage.stageWidth;
}
if (tempEnemy.y > stage.stageHeight)
{
tempEnemy.y = stage.stageHeight;
}
tempEnemy.x += Math.round(Math.random() * tempEnemy.speed);
tempEnemy.y -= Math.round(Math.random() * tempEnemy.speed);
tempEnemy.addEventListener(MouseEvent.CLICK, scoreM);
function scoreM(event:MouseEvent):void
{
makeBite(tempEnemy.x, tempEnemy.y);
removeEnemy(i);
score++;
score_txt.text = String(score);
}
function removeEnemy(idx:int)
{
removeChild(enemies[idx]);
enemies.splice(idx,1);
}
And i get an error
TypeError: Error #2007: Parameter child must be non-null.
at flash.display::DisplayObjectContainer/removeChild()
at veinsVtest_fla::MainTimeline/removeEnemy()
at MethodInfo-67()
La solution
You won't need an Array for this job. Like Man of Snow said. Use event.currentTarget will point to the "clicked on Enemy"
tempEnemy.addEventListener(MouseEvent.CLICK, scoreM);
function scoreM(event:MouseEvent):void
{
var clickedOnEnemy:MovieClip = event.currentTarget as MovieClip;
//Now you have your enemy, do whatever you please with him.
makeBite(clickedOnEnemy.x, clickedOnEnemy.y);
//And farewell, my enemy ... time to remove him.
removeChild(clickedOnEnemy);
clickedOnEnemy = null;
score++;
score_txt.text = String(score);
}
* EDIT **
There are several ways to implement "removeAllEnemies". One way to do it is to use have another MovieClip to hold all enemies created.
So create a movieClip and add it to stage.
var enemiesWrapper : MovieClip = new MovieClip();
addChild(enemiesWrapper);
And then instead of add enemy to root
addChild(tempEnemy); //Instead of doing this
Add them to this MovieClip instead.
enemiesWrapper.addChild(tempEnemy); //Do this instead
Note that your removeChild has to be updated accordingly
enemiesWrapper.removeChild(clickedOnEnemy);
And for "removeAllEnemies" function
function removeAllEnemies() {
while(enemiesWrapper.numChildren > 0) {
enemiesWrapper.removeChildAt(0);
}
}
Autres conseils
Replace removeEnemy(i);
with removeEnemy(event.currentTarget);
You cannot remove an integer, because it isn't a child. However, I'm assuming you want to remove the MovieClip that was clicked, and it looks like removeEnemy
calls removeChild()
on the parameter. If not, do you mind showing your removeEnemy
function?