Actionscript 3 在AS3中制造障碍

我在Flash中设置障碍时遇到问题。我设法制造了障碍物，但只有在没有背景的情况下才看得见。当添加一个时，它们就消失了

以下是main.as文件的代码：

package  {

import flash.display.MovieClip;
import flash.events.Event;
import flash.filters.BitmapFilterQuality; 
import flash.filters.BlurFilter;
import flash.utils.setInterval;
import flash.utils.clearInterval;

public class Main extends MovieClip {

    private var obstacleArray:Array;
    private var obstacleInterval:uint;

    private var rural2:Rural2;
    private var rural3:Rural2;
    private var cityFront2:CityFront2;
    private var cityFront3:CityFront2;
    private var cityBack2:CityBack2;
    private var cityBack3:CityBack2;
    private var skyline:Skyline;
    private var skyline2:Skyline;
    public var ship:Ship;   



    public function Main() {
        // constructor code

        obstacleArray = new Array();
        obstacleInterval = setInterval(createObstacle, 1000);

        addSkylineToStage();
        addCityBack2ToStage();
        addCityFront2ToStage();
        addRural2ToStage();
        createShip();


        addEventListener(Event.ENTER_FRAME, onEnterFrame);
    }


    private function addSkylineToStage() {

    skyline = new Skyline();
    /*var myBlurFilter:BlurFilter = new BlurFilter(8,8);
    skyline.filters = [myBlurFilter];*/ 
    stage.addChild(skyline);

    skyline2 = new Skyline();
    skyline2.x = skyline.width;
    stage.addChild(skyline2);   

    }

    private function addCityBack2ToStage() {

    cityBack2 = new CityBack2();
    cityBack2.y = 310;
    cityBack2.x = 20;

    var myBlurFilter:BlurFilter = new BlurFilter(3.7,3.7);
    cityBack2.filters = [myBlurFilter];
    stage.addChild(cityBack2);

    cityBack3 = new CityBack2();
    cityBack3.y = 310;
    cityBack3.x = cityBack2.width-20;
    cityBack3.filters = [myBlurFilter]; 
    stage.addChild(cityBack3);  

    }

    private function addCityFront2ToStage() {

    cityFront2 = new CityFront2();
    cityFront2.y = 310;

    var myBlurFilter:BlurFilter = new BlurFilter(2.3,2.3);
    cityFront2.filters = [myBlurFilter];    
    stage.addChild(cityFront2);

    cityFront3 = new CityFront2();
    cityFront3.y = 310;
    cityFront3.x = cityFront2.width-8;
    cityFront3.filters = [myBlurFilter];    
    stage.addChild(cityFront3); 

    }

    private function addRural2ToStage() {

    rural2 = new Rural2();
    rural2.y = 410;
    stage.addChild(rural2); 

    rural3 = new Rural2();
    rural3.y = 410;
    rural3.x = rural2.width-2;
    stage.addChild(rural3); 

    }

    var position:String = 'bottom';

    private function createObstacle(){

        if(position == 'bottom'){
            position = 'top';
        }else{
            position = 'bottom';
        }

        var obstacle:Obstacle = new Obstacle(stage,position);
        obstacleArray.push(obstacle);
        obstacle.x = stage.stageWidth;
        addChild(obstacle);
    }

    private function stopObstacles(){
        for(var i:int = 0; i<obstacleArray.length;i++){

            var obstacle:Obstacle = obstacleArray[i];
            obstacle.removeEvents();
        }

        clearInterval(obstacleInterval);
    } 


    private function onEnterFrame(evt:Event) {

        rural2.x -= 2;
        rural3.x -= 2;

        if(rural2.x <= -rural2.width){
            rural2.x = rural3.width-4;

        }

        if(rural3.x <= -rural3.width){
            rural3.x = rural2.width-4;

        }

        cityFront2.x -= 1;
        cityFront3.x -= 1;

        if(cityFront2.x <= -cityFront2.width){
            cityFront2.x = cityFront3.width-15;

        }

        if(cityFront3.x <= -cityFront3.width){
            cityFront3.x = cityFront2.width-15;

        }

        cityBack2.x -= 0.5;
        cityBack3.x -= 0.5;

        if(cityBack2.x <= -cityBack2.width){
            cityBack2.x = cityBack3.width-50;

        }

        if(cityBack3.x <= -cityBack3.width){
            cityBack3.x = cityBack2.width-50;

        }

        skyline.x -= 0.25;
        skyline2.x -= 0.25;

        if(skyline.x <= -skyline.width){
            skyline.x = skyline2.width-2;

        }

        if(skyline2.x <= -skyline2.width){
            skyline2.x = skyline.width-2;

        }

        for(var i:int = 0; i<obstacleArray.length; i++){

            var obstacle:Obstacle = obstacleArray[i];
            if(obstacle.hitTestObject(ship)){

                stage.removeEventListener(Event.ENTER_FRAME, onEnterFrame);
                stopObstacles();

            }
        }
    }


    public function createShip() {

        ship = new Ship(stage);
        stage.addChild(ship);

        ship.x = 20;
        ship.y = 180;


    }

}

}

我如何调整代码，以便在舞台上同时看到视差背景和障碍物

---

谢谢大家!

噢，起初我没有注意到代码中的“setInterval”，它确实会给其他元素增加障碍。也许在添加索引时尝试将其索引设置为顶部？因此：

addChildAt（障碍物，阶段，numChildren-1）

对于测试分层问题，您可以尝试将所有元素的alpha设置为0.5，这样您就可以查看是否有东西在舞台上，但在其他元素后面，或者只是没有添加到舞台上

---

另外，它对调试显示列表问题非常有帮助，因为您可以在调试器中选择元素，并在屏幕上查看它们的位置。

您不应该向后台添加任何内容，这不是为了这个目的。这是一个典型的初学者错误。如果您有自己的显示列表，请使用它。

package  {

import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Stage;


public class Obstacle extends MovieClip {

    private var speed:Number = 3;
    private var mPosition:String;
    private var mStage:Stage;       

    public function Obstacle(stage:Stage, position:String = 'bottom') {
        // constructor code

        mPosition = position;
        mStage = stage;
        addEvents();
        setPosition();
    }

        private function setPosition(){

        var factor:Number = Math.random()+0.3;          
        this.scaleY = factor;

        if(mPosition == 'bottom'){

            this.y = mStage.stageHeight - this.height;

        }else{
            this.y = 0;
        }

    }

    private function addEvents(){

        addEventListener(Event.ENTER_FRAME, onFrame);

    }

    public function removeEvents(){

        removeEventListener(Event.ENTER_FRAME, onFrame);

    }

    private function onFrame(evt:Event){

        this.x -= speed;

    }

}