我是一名大学生，目前正在自行完成一项任务，使用Animate CC上的ActionScript 3为Android创建Flash游戏。
我是ActionScript 3的初学者，发现自己陷入了我正在制作的游戏的最后一点。
在游戏的屏幕上，我有一个按钮，允许用户再次玩游戏（重启游戏），这就是问题发生的地方。按下再次播放按钮并开始游戏的那一刻，所有内容都被冻结，但评分系统正在运行。
我想要做的是，当用户按下＆＃34;再次播放＆＃34;按钮，它将带他/她进入屏幕，它允许您选择难度，只是简单地重播游戏。
这是我的游戏如何运作的结构：
这些是我在下面收到的一些错误：
TypeError：错误＃1009：无法访问null的属性或方法 对象参考。在 AndroidSnowballShooterSanta_fla :: MainTimeline / startGameInEasyMode（）
TypeError：错误＃1009：无法访问null的属性或方法 对象参考。在 AndroidSnowballShooterSanta_fla :: MainTimeline / moveSantaMCTowardMouse（）
TypeError：错误＃1009：无法访问null的属性或方法 对象参考。在 AndroidSnowballShooterSanta_fla :: MainTimeline / moveSantaMCTowardMouse（）
我用于Game Over屏幕的代码用于启用重放游戏的功能：
//Option button to let the user play Game again
playAgainButton.addEventListener(MouseEvent.MOUSE_UP, restartGame);
function restartGame(evt:MouseEvent)
{
playAgainButton.removeEventListener(MouseEvent.MOUSE_UP, restartGame);
gotoAndPlay(1,"Choose Level");
----------------------------
//The code used in the Choose Level Screen looks like this
stop();
easyButton.addEventListener(MouseEvent.MOUSE_UP, startGameInEasyMode);
function startGameInEasyMode(evt:MouseEvent)
{
gotoAndPlay(1,"GameEasy");
easyButton.removeEventListener(MouseEvent.MOUSE_UP, startGameInEasyMode);
}
hardButton.addEventListener(MouseEvent.MOUSE_UP, startGameInHardMode);
function startGameInHardMode(evt:MouseEvent)
{
gotoAndPlay(1, "GameHard");
hardButton.removeEventListener(MouseEvent.MOUSE_UP, startGameInHardMode);
}
DifficultiesBackButton.addEventListener(MouseEvent.MOUSE_UP, returnToHome);
function returnToHome(evt:MouseEvent)
{
gotoAndPlay(1,"Intro");
DifficultiesBackButton.removeEventListener(MouseEvent.MOUSE_UP, returnToHome);
}
-------------------------------------
//GAME EASY
stop();
import flash.events.Event;
var myStartTime = getTimer();
var bottomEdge = 0;
var topEdge = 800;
var leftEdge = 0;
var rightEdge = 480;
var SantaMCSpeed = 0.7;
addEventListener(Event.ENTER_FRAME,moveSantaMCTowardMouse);
function moveSantaMCTowardMouse(e:Event)
{
var angleInRad = Math.atan2((mouseY-SantaMC.y),(mouseX-SantaMC.x));
SantaMC.rotation = (90 + angleInRad * 180/Math.PI);
var distanceX = SantaMC.x - mouseX;
var distanceY = SantaMC.y - mouseY;
SantaMC.x -= (distanceX / 5) * SantaMCSpeed;
SantaMC.y -= (distanceY / 5) * SantaMCSpeed;
}
// defining SnowCannonMC1
SnowCannonMC1.x = 50;
SnowCannonMC1.y = 800;
SnowCannonMC1.pointing = "up";
SnowCannonMC1.increment = 7;
//moving Cannon 1
addEventListener(Event.ENTER_FRAME, moveSnowCannonMC1);
function moveSnowCannonMC1(evt:Event)
{
if (SnowCannonMC1.x < leftEdge)
{
SnowCannonMC1.pointing = "right";
}
if (SnowCannonMC1.x > rightEdge)
{
SnowCannonMC1.pointing = "left";
}
if (SnowCannonMC1.pointing == "right")
{
SnowCannonMC1.x += SnowCannonMC1.increment;
}
else
{
SnowCannonMC1.x -= SnowCannonMC1.increment;
}
}
//making the Snow Cannons shoot at random
var SnowCannonShootRate = 65;
var snowBallMCCount = 0;
var shootingSound = new cannonShotSound();
addEventListener(Event.ENTER_FRAME, shootSnowballCannon);
function shootSnowballCannon(evt:Event)
{
var SnowCannonMC1ShootValue = Math.ceil(Math.random() * SnowCannonShootRate);
if (SnowCannonMC1ShootValue <= 1)
{
shoot(SnowCannonMC1);
}
}
function shoot(aSnowBall)
{
shootingSound.play();
snowBallMCCount++;
var newSnowBallMC = root["snowBallMC" + snowBallMCCount]=this.addChild(new Snowball());
newSnowBallMC.width = 19;
newSnowBallMC.height = 19;
newSnowBallMC.rotation = aSnowBall.rotation;
newSnowBallMC.x = aSnowBall.x;
newSnowBallMC.y = aSnowBall.y;
}
//moving snowBallMCs
var score;
var finalScore;
addEventListener(Event.ENTER_FRAME, moveSnowBallMC);
function moveSnowBallMC(evt:Event) {
score = getTimer() - myStartTime;
timeBoxEasy.text = String(Math.ceil((score)/1000));
var speed:Number = 0.70;
for (var i=1; i<=snowBallMCCount; i++) {
var snowBall = root["snowBallMC"+i];
if(snowBall.rotation == 0)
{
snowBall.y += -10 * speed;
}
else
{
snowBall.x += 10 * speed;
}
if(snowBall.hitTestObject(SantaMC))
{
//var SantaShotDeadSound = new objectShotDeadSound();
//SantaShotDeadSound.play();
removeEventListener(Event.ENTER_FRAME,moveSantaMCTowardMouse);
removeEventListener(Event.ENTER_FRAME, moveSnowCannonMC1);
removeEventListener(Event.ENTER_FRAME, shootSnowballCannon);
removeEventListener(Event.ENTER_FRAME, moveSnowBallMC);
finalScore= score;
gotoAndPlay(1,"Game Over")
break;
}
}
}
// adding the scores to the highscores table
var scoreTable = SharedObject.getLocal("data");
if((scoreTable.data.nameArray==undefined)||(scoreTable.data.scoreArray==undefined)){
scoreTable.data.nameArray = new Array();
scoreTable.data.scoreArray = new Array();
}
function displayScoreTable() {
sortScores();
var temp ="LEADERBOARD \n";
var nameArray = scoreTable.data.nameArray;
var scoreArray = scoreTable.data.scoreArray;
for (var nameCount = 0; nameCount < nameArray.length; nameCount++) {
temp += nameArray[nameCount] + " ----- " + String(Math.ceil((scoreArray[nameCount])/1000)) +"\n";
}
scoreTableBox.text = temp;
}
function sortScores(){
var nameArray = scoreTable.data.nameArray;
var scoreArray = scoreTable.data.scoreArray;
var len = nameArray.length;
var tempName;
var tempScore;
for (var count1=0; count1 < len - 1; count1++){
for (var count2=count1+1; count2 < len; count2++){
if(scoreArray[count1]<scoreArray[count2]){
tempName=nameArray[count1];
nameArray[count1]=nameArray[count2];
nameArray[count2]=tempName;
tempScore=scoreArray[count1];
scoreArray[count1]=scoreArray[count2];
scoreArray[count2]=tempScore;
}
}
}
}