Question

大家好！我是杰里米，一名大学生。我正在制作一个有故事和最多3级的射击游戏（这是我们在2天内到期的决赛）。我知道我必须知道学校的这个东西bcoz，但说实话，我不。而且我对动作3非常不满意所以我真的需要你的帮助。我知道这个问题一直在网上。但我仍然不知道如何解决错误代码1009和2007 ..

所以这是我的第4帧代码：

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


stop();

var container:MovieClip = new MovieClip();
addChild(container);



//move the spaceship using our mouse

function controlSpaceShip(event:Event):void 
{

 shipMC.x = stage.mouseX;
 Mouse.hide();

}

stop();
var score:int = 0;

stage.addEventListener(Event.ENTER_FRAME, controlSpaceShip);


//shoot bullets when we left click on the mouse
function shootBullet(event:MouseEvent):void 
{

    var thebullet:MovieClip = new bullet(); //calls the bullet symbol from the library

    //positions the bullet at the position of your ship
    thebullet.x = shipMC.x + 30;
    thebullet.y = shipMC.y + 20; 

    //we add the bullet onto the stage
    container.addChild(thebullet);


}

stage.addEventListener(MouseEvent.CLICK, shootBullet);

//when bullet hits the enemy1
function hitEnemy(event:Event):void {

    if (container.hitTestObject(enemy1)) {

        enemy1.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy); 


//when bullet hits the enemy2
function hitEnemy2(event:Event):void {

    if (container.hitTestObject(enemy2)) {

        enemy2.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy2); 

//when bullet hits the enemy3
function hitEnemy3(event:Event):void {

    if (container.hitTestObject(enemy3)) {

        enemy3.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy3); 

//when bullet hits the enemy4
function hitEnemy4(event:Event):void {

    if (container.hitTestObject(enemy4)) {

        enemy4.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy4); 

//when bullet hits the enemy5
function hitEnemy5(event:Event):void {

    if (container.hitTestObject(enemy5)) {

        enemy5.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy5); 

//when bullet hits the enemy6
function hitEnemy6(event:Event):void {

    if (container.hitTestObject(enemy6)) {

        enemy6.alpha = 0;
        score = score + 5;
        txtScore.text = (score).toString();
    }
    if (txtScore.text == (150).toString())
    {
        gotoAndStop(5);
    }

}

stage.addEventListener(Event.ENTER_FRAME, hitEnemy6); 


//move the enemies vertically

function moveEnemies(event:Event):void {


    //ENEMY 1
    enemy1.y += 8; //increment the y location of my enemy 6 pixels

    if (enemy1.y > 600) { //if my enemy is outside the stage

        enemy1.y = 0; //place it back on the stage
        enemy1.x = Math.random() * 550; //randomize its horizontal location
    }


    //ENEMY 2
    enemy2.y += 4; //increment the y location of my enemy 3 pixels

    if (enemy2.y > 600) { //if my enemy is outside the stage

        enemy2.y = 0; //place it back on the stage
        enemy2.x = Math.random() * 550; //randomize its horizontal location
    }


    //ENEMY 3
    enemy3.y += 3; //increment the y location of my enemy 3 pixels

    if (enemy3.y > 600) { //if my enemy is outside the stage

        enemy3.y = 0; //place it back on the stage
        enemy3.x = Math.random() * 550; //randomize its horizontal location
    }


    //ENEMY 4
    enemy4.y += 4; //increment the y location of my enemy 3 pixels

    if (enemy4.y > 600) { //if my enemy is outside the stage

        enemy4.y = 0; //place it back on the stage
        enemy4.x = Math.random() * 550; //randomize its horizontal location
    }


    //ENEMY 5
    enemy5.y += 4; //increment the y location of my enemy 3 pixels

    if (enemy5.y > 600) { //if my enemy is outside the stage

        enemy5.y = 0; //place it back on the stage
        enemy5.x = Math.random() * 550; //randomize its horizontal location
    }


    //ENEMY 6
    enemy6.y += 4; //increment the y location of my enemy 3 pixels

    if (enemy6.y > 600) { //if my enemy is outside the stage

        enemy6.y = 0; //place it back on the stage
        enemy6.x = Math.random() * 550; //randomize its horizontal location
    }
}

stage.addEventListener(Event.ENTER_FRAME, moveEnemies);

所以在杀死所有6个敌人并且得分至少150之后，我希望框架跳到第5帧（成功），而第5帧有按钮点击进入第6帧（故事并转到第2级）..

这是继续前进和下去的错误..

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at finals_interactivegame2_fla::MainTimeline/moveEnemies()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at finals_interactivegame2_fla::MainTimeline/controlSpaceShip()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy2()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy3()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy4()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy5()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy6()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at finals_interactivegame2_fla::MainTimeline/moveEnemies()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at finals_interactivegame2_fla::MainTimeline/controlSpaceShip()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy2()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy3()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy4()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy5()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy6()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at finals_interactivegame2_fla::MainTimeline/moveEnemies()
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at finals_interactivegame2_fla::MainTimeline/controlSpaceShip()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy2()
TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at finals_interactivegame2_fla::MainTimeline/hitEnemy3()

我希望有人帮助我，因为我不知道该怎么办。我没有人帮助我。我的同学不平易近人，友好。这将在2天内提交。所以我不想失败。我希望有人......有人帮助我完成比赛。

您可以在Actionscript3 shooter game查看我的文件谢谢。

Answer 1

您的问题是您添加了所有这些ENTER_FRAME侦听器，但在转到下一帧之前不会删除它们。所以他们一直在奔跑，他们试图引用你所有的敌人和容器，即使这些东西在你换帧时都被卸下了。

要解决此问题，您需要先删除所有这些侦听器，然后再转到第5帧。

我建议创建一个名为checkGameComplete的函数或类似的函数：

function checkGameComplete():void {
    if (txtScore.text == (150).toString()){
        stage.removeEventListener(Event.ENTER_FRAME, hitEnemy6);  //repeat for ALL enter frame listeners
        //rest of the removeEventListeners

        gotoAndStop(5);
    }
}

然后在每次hitEnemy检查时调用checkGameComplete()。

顺便说一下，通过制作一个命中敌人方法，一个移动方法和一个输入框架监听器来减少你的代码冗余：

stop();
var score:int = 0;
var container:MovieClip = new MovieClip();
addChild(container);
stage.addEventListener(Event.ENTER_FRAME, gameLoop);  //just the one ENTER FRAME handler
Mouse.hide(); //you only need to call this once, instead of every bullet fire

stage.addEventListener(MouseEvent.CLICK, shootBullet);

function shootBullet(event:MouseEvent):void 
{

    var thebullet:MovieClip = new bullet(); //calls the bullet symbol from the library

    //positions the bullet at the position of your ship
    thebullet.x = shipMC.x + 30;
    thebullet.y = shipMC.y + 20; 

    //we add the bullet onto the stage
    container.addChild(thebullet);


}

function gameLoop(event:Event):void {
    if(!shipMC) return;
    shipMC.x = stage.mouseX;
    moveEnemy(enemy1, 8);
    moveEnemy(enemy2, 4);
    moveEnemy(enemy3, 3);
    moveEnemy(enemy4, 4);
    moveEnemy(enemy5, 4);
    moveEnemy(enemy6, 4);

}

function hitEnemyCheck(enemy):void {
    if (container.hitTestObject(enemy)) {
        //enemy.visible = false; //instead of hiding it, move it back up
        enemy.y = -100;

        score = score + 5;
        txtScore.text = (score).toString();
        checkGameComplete();
    }
}

function moveEnemy(enemy, amount):void {
    enemy.y += amount; //increment the y location of my enemy

    if (enemy.y > 600) { //if my enemy is outside the stage 
        enemy.y = 0; //place it back on the stage
        enemy.x = Math.random() * 550; //randomize its horizontal location
    }

    hitEnemyCheck(enemy);
}

function checkGameComplete():void {
    if (txtScore.text == (150).toString()){
        stage.removeEventListener(Event.ENTER_FRAME, gameLoop);
        stage.removeEventListener(MouseEvent.CLICK, shootBullet); //clean up listeners
        removeChild(container); //get rid of this container you created
        Mouse.show();  //show the mouse again
        gotoAndStop(5);
    }
}

我也注意到，在你的第5帧代码（以及第6帧代码）中，你在next3_btn点击上调用了错误的函数：

next3_btn.addEventListener(MouseEvent.CLICK,next2Click); // <-- your calling next2Click instead of next3Click

应该是：

next3_btn.addEventListener(MouseEvent.CLICK,next3Click);

Answer 2

在hitEnemy6函数和gotoAndStop(5)之前，您应该删除已添加的所有事件侦听器，转到第5帧：

stage.removeEventListener(Event.ENTER_FRAME, hitEnemy)
stage.removeEventListener(Event.ENTER_FRAME, hitEnemy2)
stage.removeEventListener(Event.ENTER_FRAME, hitEnemy3)
stage.removeEventListener(Event.ENTER_FRAME, hitEnemy4)
stage.removeEventListener(Event.ENTER_FRAME, hitEnemy5)
stage.removeEventListener(Event.ENTER_FRAME, hitEnemy6)
stage.removeEventListener(Event.ENTER_FRAME, moveEnemies)
stage.removeEventListener(Event.ENTER_FRAME, controlSpaceShip)
stage.removeEventListener(MouseEvent.CLICK, shootBullet)

gotoAndStop(5)

在moveEnemies函数中，您应该使用简单的enemy每次验证if对象是否为空：

if (enemy1) {       
    enemy1.y +=  8
    if (enemy1.y > 600){
        enemy1.y = 0
        enemy1.x = Math.random() * 550
    }
}

您应该为所有enemy个对象（1 - ＆gt; 6）执行此操作。

我不知道为什么你创建了6个Event.ENTER_FRAME，每个enemy对象创建一个！{你可以这样做：

stage.addEventListener(Event.ENTER_FRAME, hitEnemy)
function hitEnemy(event:Event):void {   

    if (container.hitTestObject(enemy1)) {

        enemy1.alpha = 0
        score = score + 5
        txtScore.text = (score).toString()

    }

    if (container.hitTestObject(enemy2)) {

        enemy2.alpha = 0
        score = score + 5
        txtScore.text = (score).toString()

    }

    // do the same thing for all your enemy objects ...

}

...

Actionscript3射击游戏错误1009和2009

2 个答案: