[英]How do I unload an external “.swf” file to load another?
我是一個在游戲上工作了幾個月的學生,現在我陷入了一個問題。 我是ActionScript 3的新手,但我學得很快。
我可以將菜單屏幕(“ startScreen.swf”)自動加載到我的游戲(firstgame)中,然后單擊“ play”或“ storyScreen”或“ instructionsScreen”,一切正常。 但是問題是我想按ESC按鈕后返回。 我已經嘗試了很多代碼,但是沒有任何功能可以滿足我的要求。
示例:單擊故事,然后加載swf(storyScreen.swf),可以閱讀該故事,完成后,我想按ESC重新加載swf(startScreen.swf)及其中的所有功能。 喜歡玩耍和指示。
您可以在函數( esc
)中找到我的代碼和空白區域。
我知道這可能很容易解決,但我真的不知道如何解決。 :(
public class FirstGame extends MovieClip
{
public var Player:MovieClip
private var leftKeyIsDown:Boolean;
private var RightKeyIsDown:Boolean;
private var aMissileArray:Array;
private var aEnemyArray:Array;
public var scoreTxt:TextField;
public var ammoTxt:TextField;
public var MenuEnd:EndGameScreen;
public var menuAgain:EndGameScreen;
private var MenuStart:mcStartGameScreen;
private var MenuStory:mcStartGameScreen;
private var MenuInstructions:mcStartGameScreen;
private var nScore:Number;
private var nAmmo:Number;
private var tEnemyTimer:Timer;
public function FirstGame()
{
//Create a loader object
var startLoader:Loader = new Loader();
//add event listener to listen for the complete event
startLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, startLoaded);
//load our loader object
startLoader.load(new URLRequest("startScreen.swf"));
}
public function startLoaded(e:Event):void
{
MenuEnd.hideScreen();
Player.visible = false;
scoreTxt.visible = false;
ammoTxt.visible = false;
//get a reference to the loaded movieclip
MenuStart = e.target.content as mcStartGameScreen;
//listen for start game event
MenuStart.addEventListener("START_GAME", playGameAgain);
//add it to the stage
addChild(MenuStart);
//get a reference to the loaded movieclip
MenuStory = e.target.content as mcStartGameScreen;
//listen for start game event
MenuStory.addEventListener("SHOW_STORY", storyGameScreen);
//add it to the stage
addChild(MenuStory);
//get a reference to the loaded movieclip
MenuInstructions = e.target.content as mcStartGameScreen;
//listen for start game event
MenuInstructions.addEventListener("SHOW_INSTRUCTIONS", instructionsGameScreen);
//add it to the stage
addChild(MenuInstructions);
}
private function instructionsGameScreen(e:Event):void
{
var instructionsLoader:Loader = new Loader();
var url:URLRequest = new URLRequest("instructionsScreen.swf");
instructionsLoader.load(url);
addChild(instructionsLoader);
stage.addEventListener(KeyboardEvent.KEY_UP, esc);
}
private function storyGameScreen(e:Event):void
{
var storyLoader:Loader = new Loader();
var url:URLRequest = new URLRequest("storyScreen.swf");
storyLoader.load(url);
addChild(storyLoader);
stage.addEventListener(KeyboardEvent.KEY_UP, esc);
}
private function esc(e:KeyboardEvent):void
{
if (e.keyCode == 27)
{
//fscommand("quit");
/////////test//////////////////(new URLRequest(stage.loaderInfo.url), "FirstGame.swf");
}
}
private function playGameAgain(e:Event):void
{
//initialize variables
aMissileArray = new Array();
aEnemyArray = new Array();
nScore = 0;
nAmmo = 20;
Player.x = 262,95
Player.y = 323,30
Player.visible = true;
scoreTxt.visible = true;
ammoTxt.visible = true;
MenuStart.hideScreen();
MenuEnd.addEventListener("PLAY_AGAIN", playGameAgain);
MenuEnd.hideScreen();
updateScoreText();
updateAmmoText();
//trace("First Game Loaded");
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDown);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUp);
stage.addEventListener(Event.ENTER_FRAME, gameLoop)
//creat an timer object
tEnemyTimer = new Timer(1000)
//listen for the timer ticks/intervals
tEnemyTimer.addEventListener(TimerEvent.TIMER, addEnemy)
//start our timer
tEnemyTimer.start();
}
我相信您應該能夠在相同的加載器對象上啟動新請求。 無論哪種方式,您都在處理對象創建和清理。 我提供的解決方案的關鍵是您可以重復使用裝載機。
您當前的代碼有些重復,因此我對其進行了一些修改,以演示如何簡化代碼。 查看代碼時的一些想法:
試試看:
public var Player:MovieClip
private var leftKeyIsDown:Boolean;
private var RightKeyIsDown:Boolean;
private var aMissileArray:Array;
private var aEnemyArray:Array;
public var scoreTxt:TextField;
public var ammoTxt:TextField;
public var MenuEnd:EndGameScreen;
public var menuAgain:EndGameScreen;
private var MenuStart:mcStartGameScreen;
private var MenuStory:mcStartGameScreen;
private var MenuInstructions:mcStartGameScreen;
private var nScore:Number;
private var nAmmo:Number;
private var tEnemyTimer:Timer;
private var screens:Object = {
"SHOW_INSTRUCTIONS":{
"loader":new Loader(),
"url":new URLRequest("instructionsScreen.swf")
},
"SHOW_STORY":{
"loader":new Loader(),
"url":new URLRequest("storyScreen.swf")
},
"START_GAME":{
"loader":new Loader(),
"url":new URLRequest("startScreen.swf")
}
}
public function FirstGame() {
var startLoader:Loader = loadScreen({"type":"START_GAME"});
//Register our event listeners
startLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, startLoaded);
stage.addEventListener(KeyboardEvent.KEY_UP, esc);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUp);
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDown);
stage.addEventListener(Event.ENTER_FRAME, gameLoop)
}
private function loadScreen(e:Object):Loader {
screens[e.type].loader.load(screens[e.type].url);
addChild(screens[e.type].loader);
return screens[e.type].loader;
}
public function startLoaded(e:Event):void {
//initialize variables
aMissileArray = new Array();
aEnemyArray = new Array();
nScore = 0;
nAmmo = 20;
Player.x = 262, 95
Player.y = 323, 30
Player.visible = true;
scoreTxt.visible = true;
ammoTxt.visible = true;
MenuEnd.addEventListener("PLAY_AGAIN", playGameAgain);
MenuEnd.hideScreen();
updateScoreText();
updateAmmoText();
//creat an timer object
tEnemyTimer = new Timer(1000)
tEnemyTimer.addEventListener(TimerEvent.TIMER, addEnemy)
tEnemyTimer.start();
var swfRoot = screens.START_GAME.loader["content"];
swfRoot.addEventListener("START_GAME", loadScreen);
swfRoot.addEventListener("SHOW_STORY", loadScreen);
swfRoot.addEventListener("SHOW_INSTRUCTIONS", loadScreen);
}
private function esc(e:KeyboardEvent):void {
if (e.keyCode == 27) {
//fscommand("quit");
// Loop through our loaders, and reset them all.
for each (var entry:Object in screens) {
entry.loader.unloadAndStop();
removeChild(entry.loader);
}
// Reload the start screen
var startLoader:Loader = loadScreen({"type":"START_GAME"});
startLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, startLoaded);
}
}
我要犯的最后一件事是告訴您如何運行您的項目,但是,我認為您在這里可能采用了錯誤的方法。
與其將故事和游戲設置為單獨的swf文件,您可能需要做的是將故事設置為MovieClip,將游戲設置為MovieClip。 (是的,MovieClips可以包含其他符號,包括其他MovieClips。)然后,您將需要使用代碼從舞台中隱藏/顯示或添加/刪除這些MovieClips。
如果您需要知道如何執行此操作,請讓我給您一個古老的建議:RTD(請閱讀文檔)。 這些是在線Adobe Flash文檔以及眾多在線教程中介紹的基本任務。
希望對您有所幫助!
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