Showing main menu over objects / movieclips?
这是我发布的问题，切尔尼夫帮我解决了问题。但是，在尝试初始化/定义按钮以向其添加事件处理程序时，我遇到了一些困难。这是我的Main.as：
package {
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.DisplayObject;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.TimerEvent;
import flash.utils.Timer;
import flash.ui.Mouse;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.text.TextFormat;
import flash.text.TextField;
import flash.display.Loader;
import flash.net.URLRequest;
import flash.net.URLLoader;
import flash.system.LoaderContext;
import flash.display.Sprite;
import flash.net.Socket;
public class Main extends MovieClip {
public static var gameLayer:Sprite = new Sprite;
public static var endGameLayer:Sprite = new Sprite;
public static var menuLayer:Sprite = new Sprite;
public var gameTime:int;
public var levelDuration:int;
public var crosshair:crosshair_mc;
static var score:Number;
var enemyShipTimer:Timer;
var enemyShipTimerMed:Timer;
var enemyShipTimerSmall:Timer;
static var scoreHeader:TextField = new TextField();
static var scoreText:TextField = new TextField();
static var timeHeader:TextField = new TextField();
static var timeText:TextField = new TextField();
public function Main()
{
var mainMenu:myMenu = new myMenu;
addChild(gameLayer);
addChild(endGameLayer);
addChild(menuLayer);
playBtn.addEventListener(MouseEvent.CLICK, startButtonPressed);
}
function startButtonPressed(e:Event)
{
levelDuration = 30;
gameTime = levelDuration;
var gameTimer:Timer = new Timer(1000,levelDuration);
gameTimer.addEventListener(TimerEvent.TIMER, updateTime);
gameTimer.addEventListener(TimerEvent.TIMER_COMPLETE, timeExpired)
gameTimer.start();
scoreHeader = new TextField();
scoreHeader.x = 5;
scoreHeader.text = String("Score: ");
gameLayer.addChild(scoreHeader);
scoreText = new TextField();
scoreText.x = 75;
scoreText.y = 0;
scoreText.text = String(0);
gameLayer.addChild(scoreText);
timeHeader = new TextField();
timeHeader.x = 490;
timeHeader.y = 0;
timeHeader.text = String("Time: ");
gameLayer.addChild(timeHeader);
timeText = new TextField();
timeText.x = 550;
timeText.y = 0;
timeText.text = gameTime.toString();
gameLayer.addChild(timeText);
var scoreFormat = new TextFormat("Arial Rounded MT Bold", 20, 0xFFFFFF);
scoreHeader.setTextFormat(scoreFormat);
scoreText.setTextFormat(scoreFormat);
timeHeader.setTextFormat(scoreFormat);
timeText.setTextFormat(scoreFormat);
enemyShipTimer = new Timer(2000);
enemyShipTimer.addEventListener("timer", sendEnemy);
enemyShipTimer.start();
enemyShipTimerMed = new Timer(2500);
enemyShipTimerMed.addEventListener("timer", sendEnemyMed);
enemyShipTimerMed.start();
enemyShipTimerSmall = new Timer(2750);
enemyShipTimerSmall.addEventListener("timer", sendEnemySmall);
enemyShipTimerSmall.start();
crosshair = new crosshair_mc();
gameLayer.addChild(crosshair);
crosshair.mouseEnabled = crosshair.mouseChildren = false;
Mouse.hide();
gameLayer.addEventListener(Event.ENTER_FRAME, moveCursor);
resetScore();
}
function sendEnemy(e:Event)
{
var enemy = new EnemyShip();
gameLayer.addChild(enemy);
gameLayer.addChild(crosshair);
}
function sendEnemyMed(e:Event)
{
var enemymed = new EnemyShipMed();
gameLayer.addChild(enemymed);
gameLayer.addChild(crosshair);
}
function sendEnemySmall(e:Event)
{
var enemysmall = new EnemyShipSmall();
gameLayer.addChild(enemysmall);
gameLayer.addChild(crosshair);
}
static function updateScore(points)
{
score += points;
scoreText.text = String(score);
var scoreFormat = new TextFormat("Arial Rounded MT Bold", 20, 0xFFFFFF);
scoreHeader.setTextFormat(scoreFormat);
scoreText.setTextFormat(scoreFormat);
}
static function resetScore()
{
score = 0;
scoreText.text = String(score);
}
function updateTime(e:TimerEvent):void
{
trace(gameTime);
// your class variable tracking each second,
gameTime--;
//update your user interface as needed
var scoreFormat = new TextFormat("Arial Rounded MT Bold", 20, 0xFFFFFF);
timeText.defaultTextFormat = scoreFormat;
timeText.text = String(gameTime);
}
function timeExpired(e:TimerEvent):void
{
var gameTimer:Timer = e.target as Timer;
gameTimer.removeEventListener(TimerEvent.TIMER, updateTime)
gameTimer.removeEventListener(TimerEvent.TIMER, timeExpired)
// do whatever you need to do for game over
}
function moveCursor(event:Event)
{
crosshair.x=mouseX;
crosshair.y=mouseY;
}
}
}
这是我的Menu.as：
package {
import flash.display.MovieClip;
import flash.display.Sprite;
import flash.display.DisplayObject;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.TimerEvent;
import flash.utils.Timer;
import flash.ui.Mouse;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.text.TextFormat;
import flash.text.TextField;
import flash.display.Loader;
import flash.net.URLRequest;
import flash.net.URLLoader;
import flash.system.LoaderContext;
import flash.display.Sprite;
import flash.net.Socket;
public class Menu extends MovieClip
{
var mainMenu:Menu = new Menu();
Main.menuLayer.addChild(myMenu);
playBtn.addEventListener(MouseEvent.CLICK, playBtnPressed);
function playBtnPressed()
{
Main.menuLayer.removeChild(myMenu);
dispatchEvent(new Event("playButtonPressed"))
}
}
在我将菜单转换为movieclip之前，我给了按钮一个实例名称playBtn，但是我收到了错误并且不太确定如何解决它。
所有按钮都在库中，时间轴中没有任何东西可以作为我的影片剪辑，并通过在.as文件中使用Actionscript动态添加到舞台中。我基本上需要找到一种动态添加菜单的方法，作为游戏打开时出现的第一件事，点击“播放”按钮删除菜单，显示游戏层并启动计时器。
感谢您的帮助。
答案 0 :(得分：1)
您的类文件不知道playBtn实例，因为它只在运行时定义（当在flashPro中的时间轴上删除并给出实例名称时）
您需要做的就是在类中定义var：
public var playBtn:MovieClip; //or if not a movieClip whatever displayobject type it is
您的Menu.as课程也有问题。 以下两行：
Main.menuLayer.addChild(myMenu);
playBtn.addEventListener(MouseEvent.CLICK, playBtnPressed);
需要包含在一个函数中（可能想要它是你的构造函数），所以它应该是这样的：
public class Menu extends MovieClip {
public var mainMenu:Menu; //I don't think you want this at all in this class
//creating a function with same name as your class creates a constructor, which is called when you instantiate an object: eg new Menu();
public function Menu():void {
mainMenu = new Menu(); //this seems very strange, and would create an endless overflow of new menu objects, I don't think this is what you want
Main.menuLayer.addChild(myMenu);
//again, you need to either define this var, not sure if it's supposed to be a passed in var from your other class or a separate instance
playBtn.addEventListener(MouseEvent.CLICK, playBtnPressed);
}
function playBtnPressed()
{
Main.menuLayer.removeChild(myMenu);
dispatchEvent(new Event("playButtonPressed"))
}
}