我们正在制作太空影响游戏。这是我们的3个课程。我们的问题是，当我们创建InimigoNoite时，它们会出现在整个游戏中（菜单，其他级别等），而不是仅出现在我们想要的场景中。我们应该如何限制孩子只出现在CenárioCidade？
我们尝试使用gotoandPlay，addChildAt，并尝试创建不在Main类中的Inimigo，但是在Inimigo类本身中，但它根本没有出现。有人可以帮助我们吗？非常感谢你！
KEY.as
package {
import flash.display.Stage;
import flash.events.Event;
import flash.events.KeyboardEvent;
public class Key {
private static var initialized:Boolean = false;
private static var keysDown:Object = new Object();
public static function initialize(stage:Stage) {
if (!initialized) {
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
stage.addEventListener(Event.DEACTIVATE, clearKeys);
initialized = true;
}
}
public static function isDown(keyCode:uint):Boolean
{
return Boolean(keyCode in keysDown);
}
private static function keyPressed(event:KeyboardEvent):void {
keysDown[event.keyCode] = true;
}
private static function keyReleased(event:KeyboardEvent):void {
if (event.keyCode in keysDown) {
delete keysDown[event.keyCode];
}
}
private static function clearKeys(event:Event):void {
keysDown = new Object();
}
}
}
INIMIGO NOITE.as
package{
import flash.display.MovieClip;
import flash.events.Event;
import flash.utils.Timer;
public class InimigoNoite extends MovieClip{
var speed:Number;
static var list:Array = new Array();
var balaTimer: Timer;
function InimigoNoite(){
list.push(this);
this.x = 1160;
this.y = 150 + (450-150) * Math.random();
speed = Math.random()*5 + 5;
addEventListener("enterFrame", enterFrame);
var intervalo: Number = Math.random()*500 + 1000;
balaTimer = new Timer(intervalo);
balaTimer.addEventListener("timer", bala);
balaTimer.start();
}
function enterFrame (e:Event){
this.x -= speed;
if(this.x < -100){
matar();
return;
}
if(this.hitTestObject(SpaceImpact.navecnoite)){
matar();
}
}
function matar(){
var explosao = new ExplosaoNoite();
stage.addChild(explosao);
explosao.x = this.x;
explosao.y = this.y;
balaTimer.stop();
balaTimer.removeEventListener("timer",bala);
removeEventListener("enterFrame", enterFrame);
stage.removeChild(this);
for(var i in list){
if(list[i] == this){
delete list[i];
}
}
}
function bala(e:Event){
var b = new BalaInimigo();
b.x = this.x -50;
b.y = this.y;
stage.addChild(b);
}
}
}
MAIN.as
package{
import flash.display.MovieClip;
import flash.events.Event;
import flash.utils.Timer;
public class SpaceImpact extends MovieClip{
static var navecnoite:MovieClip;
var inimigoNoiteTimer:Timer;
function SpaceImpact(){
Key.initialize(stage);
inimigoNoiteTimer = new Timer(8000);
inimigoNoiteTimer.addEventListener("timer", criaInimigo);
inimigoNoiteTimer.start();
}
function criaInimigo(e:Event){
var inimigo = new InimigoNoite();
stage.addChild(inimigo);
addChildAt(inimigo, 3);
}
}
}
答案 0 :(得分：1)
你永远不会停止计时器。所以你的inimigo每8秒创建并添加一次。 在criaInimigo中停止计时器和/或使用timerComplete事件
function SpaceImpact(){
Key.initialize(stage);
inimigoNoiteTimer = new Timer(8000,1);
inimigoNoiteTimer.addEventListener(TimerEvent.TIMER_COMPLETE, criaInimigo);
inimigoNoiteTimer.start();
}
function criaInimigo(e:Event){
//inimigoNoiteTimer.stop();//only needed if you use the 'timer'-Event
var inimigo = new InimigoNoite();
stage.addChild(inimigo);
addChildAt(inimigo, 3);
}
答案 1 :(得分：1)
当应用程序启动时，您每8秒创建一个新的InimigoNoite。由于您要将它们添加到stage，因此它们会显示在时间轴上的所有内容之上。
问题（除了在应用程序启动时创建它们并且永不停止计时器），当您通过代码使用addChild时，该子项将保留在屏幕上，直到通过removeChild明确删除它（或其中一个父母是 - 但由于父母stage不会发生）。
我看到你在InimigoNoite类中有一个可能会删除它的命中测试，但我没有看到你删除它的任何地方（所以如果命中测试永远不会发生，它将永远不会无论场景如何都从舞台上移除。
似乎问题的解决方案是关于如何构建应用程序的更多建议。
请勿使用场景。
您最好的选择是为游戏的每个不同状态创建一个类文件。所以像这样的基本例子：
让您的游戏状态类文件扩展为Sprite或MovieClip，如果您愿意，您甚至可以在flash专业版中创建一个新的MovieClip并将该类附加到该文件中（从而能够删除时间线上的视觉资产。）
那么你的Main类将负责管理状态（以及任何其他对应用程序来说是全局的）
package{
import flash.display.MovieClip;
import flash.events.Event;
public class SpaceImpact extends MovieClip {
private var menu:Menu; //Assumes you have a Menu.as class file
private var game:MainGame; //MainGame.as file
private var gameOver:GameOver; //GameOver.as file
public function SpaceImpact(){
Key.initialize(stage);
goMenu();
}
public function goMenu(e:Event = null):void {
removeAll();
menu = new Menu();
addChild(menu);
menu.addEventListener(Event.COMPLETE, startGame,false,0,true);
}
private function removeMenu():void {
if(menu){
if(menu.parent) removeChild(menu); //remove it from the screen
menu = null;
}
}
public function startGame(e:Event = null):void {
removeAll();
game = new MainGame();
addChild(game);
game.addEventListener(Event.COMPLETE, gameOver,false,0,true);
}
private function removeGame():void {
if(game){
if(game.parent) removeChild(game); //remove it from the screen
game = null;
}
}
public function gameOver(e:Event = null):void {
removeAll();
gameOver = new GameOver();
addChild(gameOver);
gameOver.addEventListener(Event.COMPLETE, goMenu,false,0,true);
}
private function removeGameOver():void {
if(gameOver){
if(gameOver.parent) removeChild(gameOver); //remove it from the screen
gameOver = null;
}
}
private function removeAll():void {
removeGameOver();
removeMenu();
removeGame();
}
}
}
然后，您的游戏状态例如： 的 MainGame.as
package{
import flash.display.MovieClip;
import flash.events.Event;
import flash.utils.Timer;
public class MainGame extends MovieClip {
private var inimigoNoiteTimer:Timer;
public function MainGame() {
this.addEventListener(Event.ADDED_TO_STAGE, addedToStage, false, 0, true); //don't do anything until this object has been added to the screen
}
private function addedToStage(e:Event):void {
this.removeEventListener(Event.ADDED_TO_STAGE, addedToStage);
//start spawning
inimigoNoiteTimer = new Timer(8000);
inimigoNoiteTimer.addEventListener("timer", criaInimigo);
inimigoNoiteTimer.start();
}
function criaInimigo(e:Event){
var inimigo = new InimigoNoite();
addChild(inimigo);
}
//when whatever happens that makes your game finished
function gameComplete():void {
dispatchEvent(new Event(addEventListener.COMPLETE));
}
}
}