我有一个类在另一个类中调用一个函数。我想知道 如果我们可以添加一个事件监听器来知道该函数是否已经触发并完成等等。
以下是相关代码的部分。
myMC = new pictures();
addChild(myMC);
myMC.loadImages("Joyful",1)
// Add Event Listener here to let me know loadImages was called and worked.
正如您所看到的，该函数名为loadImages（），它位于名为pictures.as的类中。
我可以为此添加事件监听器吗？
这是一个新问题。我使用类似的方法，我使用下面的例子，它没有用。我错过了一个导入或什么？我只显示相关的功能，而不是我的整个脚本。
Main.class 包 {
import flash.display.MovieClip;
import flash.events.*;
import flash.display.*;
import flash.filesystem.*;
import com.greensock.*;
import com.greensock.easing.*;
import flash.system.System;
// Ed's Scripts
import com.*;
import com.views.*;
public class iRosaryMain extends MovieClip
{
/// (Get Main Doc flow) this creates an instace of the main timeline
/// and then I send it
private static var _instance:iRosaryMain;
public static function get instance():iRosaryMain
{
return _instance;
}
/// Declaring Vars
var audio:audioPrayers;
/// Loading Images
//public var theImages:pictures = new pictures();
/// Movie Clips
public var myMary:beautifulMary;
public var myMC:MovieClip;
public var myPic:MovieClip;
public var myFlags:MovieClip;
public static var mt:MovieClip;
var vars:defaultVars = new defaultVars();
public function iRosaryMain()
{
// (Get Main Doc flow) Here I send the an instacne of iRosaryMain to defaultVars.as
_instance = this;
vars.getMainDoc(_instance);
// Sets timeline to mt :) I hope
mt = _instance;
audio = new audioPrayers();
trace("Jesus I trust in you!");// constructor code
audio.sayHailMary();
if (stage)
{
init();
}
}
public function moveLanguages()
{
/// File to languages folder
var checkLanguageFolder:File = File.applicationStorageDirectory.resolvePath("Languages");
///// CHECK LANGUAGES FOLDER - if not in App Storage move it
if (! checkLanguageFolder.exists)
{
var sourceDir:File = File.applicationDirectory.resolvePath("Languages");
var resultDir:File = File.applicationStorageDirectory.resolvePath("Languages");
sourceDir.copyTo(resultDir, true);
trace( "Moved Language!");
}
}
//// MAIN FUNCTIONS IN iRosaryMainClass
function init()
{
//loadFlags();
moveLanguages();
//addChild(theImages);
intro();
}
public function loadFlags()
{
myFlags.addEventListener("MyEvent", eventHandler);
myFlags = new viewLanguages();
addChild(myFlags);
myFlags.x = stage.stageWidth / 2 - myFlags.getBounds(this).width / 2;
function eventHandler()
{
trace("yes loaded");
TweenMax.fromTo(myMary,3, {alpha:1}, {alpha:0, ease:Quint.easeOut, onComplete: closePic} );
}
}
function intro()
{
myMary = new beautifulMary();
addChild(myMary);
loadFlags();
}
public function closePic()
{
removeChild(myMary);
}
public function languageLoaded(lang:String)
{
trace("YES... " + lang);
homeIn();
}
public function homeIn()
{
if (myFlags)
{
TweenMax.fromTo(myFlags,1, {x:myFlags.x}, {x:0-myFlags.width, ease:Quint.easeInOut, onComplete:unloadMyFlags} );
}
function unloadMyFlags()
{
trace("Called Ease out");
if (myFlags is MovieClip)
{
//trace("CURRENT DISPLAY " + currentDisplayScreen);
trace("CURRENT mc " + myFlags);
removeChild(myFlags);
System.gc();
myFlags = null;
trace("CURRENT mc " + myFlags);
}
}
if (! myMC)
{
myMC = new viewHome();
myMC.name = "Home";
myMC.x = stage.stageWidth / 2 - myMC.width / 2;
addChild(myMC);
}
theEaseIn(myMC);
//Home.B1.addEventListener(MouseEvent.CLICK, theEaseOut(Home));
}
public function loadLanguage(Language:String):Function
{
return function(e:MouseEvent):void ;
{
trace("Did it work? " +Language);
vars.loadButtonVars(Language);;
};
//TweenMax.fromTo(EnglishButton,1, {x:EnglishButton.x}, {x:0-EnglishButton.width, ease:Quint.easeOut} );
}
public function loadView(screen:String)
{
trace("Received " + screen);
if (screen=="Home")
{
myMC = new viewHome();
addChild(myMC);
theEaseIn(myMC);
//Home.B1.addEventListener(MouseEvent.CLICK, theEaseOut(Home));
}
if (screen=="PrayTheRosary")
{
myMC = new viewPrayTheRosary();
addChild(myMC);
theEaseIn(myMC);
//Home.B1.addEventListener(MouseEvent.CLICK, theEaseOut(Home));
}
if (screen=="Options")
{
myMC = new viewOptions();
addChild(myMC);
theEaseIn(myMC);
}
if (screen=="Downloads")
{
myMC = new viewDownloads();
addChild(myMC);
theEaseIn(myMC);
}
if (screen=="beautifulMary")
{
myMC = new beautifulMary();
addChild(myMC);
theEaseIn(myMC);
}
if (screen=="Flags")
{
myFlags = new viewLanguages();
addChild(myFlags);
theEaseIn(myFlags);
}
if (screen=="Joyful" || screen=="Sorrowful" || screen=="Glorious" || screen=="Luminous")
{
myPic = new pictures();
addChild(myPic);
myPic.addEventListener( "ImagesLoaded", doTheEaseIn);
myPic.loadImages(""+screen+"",1);
function doTheEaseIn()
{
theEaseIn(myPic);
}
}
}
public function theEaseIn(mc:MovieClip)
{
if (myMC)
{
TweenMax.fromTo(mc,1, {x:stage.stageWidth+mc.width}, {x:stage.stageWidth/2 - mc.width/2, ease:Quint.easeInOut} );
}
}
public function theEaseOut(mc:MovieClip,nextMC:String):Function
{
return function(e:MouseEvent):void ;
{
loadView(nextMC);
/// Tweens out view on screen
TweenMax.fromTo(mc,1, {x:mc.x}, {x:0-mc.width, ease:Quint.easeInOut, onComplete:unloadMC} );
function unloadMC();
{
trace("Called Ease out");
if(mc is MovieClip);
{
//trace("CURRENT DISPLAY " + currentDisplayScreen);
trace("CURRENT mc " + mc);
removeChild(mc);
System.gc();
myMC = null;
trace("CURRENT mc " + mc);
};
};
};/// end return
}
////////////
}/// End iRosaryMain
} //结束包
viewLanguages.as
包com.views
package com.views
{
import flash.display.MovieClip;
import flash.filesystem.File;
import com.roundFlag;
import flash.events.*;
import flash.display.*;
public class viewLanguages extends MovieClip
{
var Flag:MovieClip;
//public static const FLAGS_LOADED:String = "flagsLoaded";
public function viewLanguages()
{
getLang();
}
function numCheck(num:int):Boolean
{
return (num % 2 != 0);
}
/// Get for App Opening
public function getLang()
{
/// When Live
var folderLanguages:File = File.applicationStorageDirectory.resolvePath("Languages");
var availLang = folderLanguages.getDirectoryListing();
var Lang = new Array();
var LangPath = new Array();
var fl:int = 0;
for (var i:uint = 0; i < availLang.length; i++)
{
if (availLang[i].isDirectory)
{
//flag = new Loader();
//flag.load(new URLRequest(File.applicationStorageDirectory.url + "Languages/" + Lang[i] + "/roundFlag.png"));
Lang.push(availLang[i].name);
LangPath.push(availLang[i].nativePath);
Flag = new roundFlag(availLang[i].name);
Flag.name = availLang[i].name;
if (numCheck(i)==false)
{
Flag.y = fl;
Flag.x = 0;
}
else
{
Flag.y = fl;
Flag.x = Flag.width + 33;
fl = fl + Flag.height + 33;
}
Flag.btext.text = availLang[i].name;
addChild(Flag);
trace(availLang[i].nativePath);// gets the name
trace(availLang[i].name);
}
}
trace("Get Lang Called");
dispatchEvent(new Event("MyEvent"));
}
}
}
答案 0 :(得分：1)
是的，你可以。考虑到您要将剪辑添加到显示列表中，我假设它扩展了Movieclip或Sprite，两者都扩展了EventDispatcher。在您的图片课程中，您只需使用dispatchEvent(new Event("MyEvent");即可发送活动。然后你可以添加myMC.addEventListener("MyEvent", eventHandler);来对它作出反应。
你也不应该像我上面写的那样使用字符串。如果你在图片类中声明public static const IMAGES_LOADED:String = "imagesLoaded";会更好。然后你应该通过调度和听取它来使用这个常量。
编辑：这里看看常量如何：
//your class
package {
import flash.events.Event;
import flash.display.Sprite;
public class Pictures extends Sprite {
public static const IMAGES_LOADED:String = "imagesLoaded";
public function Pictures() {
}
public function onAllImagesLoaded():void {
dispatchEvent(new Event(IMAGES_LOADED));
}
//rest of your methods
}
}
//you would call it like this:
var myMc:Pictures = new Pictures();
myMc.addEventListener(Pictures.IMAGES_LOADED, onImagesLoaded);
myMc.loadImages();
function onImagesLoaded(e:Event):void {
//...etc
}
答案 1 :(得分：1)
您必须为此创建自定义事件类才能生效。像：
package com.some
{
import flash.events.Event;
public class SomeEvent extends Event
{
// Loading events
public static const MAINDATA_LOADING:String = "onMainDataLoading";
// Other event
public static const SOME_LOADING:String = "onSomeLoading";
public var params:Object;
public function SomeEvent($type:String, $params:Object, $bubbles:Boolean = false, $cancelable:Boolean = false)
{
super($type, $bubbles, $cancelable);
this.params = $params;
}
public override function clone():Event
{
return new SomeEvent(type, this.params, bubbles, cancelable);
}
}
}
在想要的类（图片）中添加事件派遣并将所需的段落传递给事件（此或其他）
dispatchEvent(new SomeEvent(SomeEvent.IMAGES_LOADED, this));
处理事件监听：
var myMc:Pictures = new Pictures();
myMc.addEventListener(SomeEvent.IMAGES_LOADED, onImagesLoaded);
myMc.loadImages();
function onImagesLoaded(e:SomeEvent):void {
// handle event.
var picts:Pictures = (e.params as Pictures);
}