HTML5游戏制作之路_08_egret对于声音的控制

/**
* 这是使用RES方法加载。
* Created by 13641 on 2015/11/19.
*/
class SoundControl extends egret.DisplayObjectContainer{

public constructor() {
super();
this.addEventListener(egret.Event.ADDED_TO_STAGE, this.mainFunc, this);
}

private mainFunc():void{
this.loadSound();
}

private loadSound():void{
RES.addEventListener(RES.ResourceEvent.GROUP_COMPLETE,this.loadSoundComplete,this);
RES.loadConfig("resource/default.res.json","resource/");
RES.loadGroup("MPsound");
}

private sound:egret.Sound;

private loadSoundComplete(event:RES.ResourceEvent):void{
this.sound= RES.getRes("mp0");
this.soundControl();
}

private soundControl():void{
var button:egret.Sprite = new egret.Sprite();
button.graphics.beginFill(0x7d7dff);
button.graphics.drawRect(100,100,100,100);
button.graphics.endFill();

button.width = 100;
button.height = 100;
this.addChild(button);

//重点在这里，点击事件的监听，点击事件的应用，记得要先设置touchEnable = true;
button.touchEnabled = true;
button.addEventListener(egret.TouchEvent.TOUCH_TAP,this.onClick,this);
}

//点击完成后的点击事件
private onClick(event:egret.Event):void{
this.sound.play();

}
}

/**
* Created by 13641 on 2015/11/20.
*/
class SoundStartAndStop extends egret.DisplayObjectContainer{
public constructor() {
super();
this.addEventListener(egret.Event.ADDED_TO_STAGE, this.mainFunc, this);
}

private mainFunc():void{
this.loadResource();

}

private loadResource():void{
RES.addEventListener(RES.ResourceEvent.GROUP_COMPLETE,this.loadComplete,this);
RES.loadConfig("resource/default.res.json","resource/");
RES.loadGroup("MPsound");

}
private sound:egret.Sound;
//注意channel这个变量，协助管理声音控制，很重要。
private channel:egret.SoundChannel;
private loadComplete(event:RES.ResourceEvent):void{
this.sound = RES.getRes("mp0");
this.SoundStartControl();
this.CloseStartControl();
}

//监听开始按钮的方法
private SoundStartControl():void{

var btn_startSound :egret.Sprite = new egret.Sprite();
btn_startSound.graphics.beginFill(0x00ff00);
btn_startSound.graphics.drawCircle(200,200,20);
btn_startSound.graphics.endFill();
btn_startSound.width = 200;
btn_startSound.height = 200;

var lable_start:egret.TextField =new egret.TextField();
lable_start.text = "播放";
lable_start.x = 200;
lable_start.y = 200;

this.addChild(btn_startSound);
this.addChild((lable_start));
btn_startSound.touchEnabled = true;
btn_startSound.addEventListener(egret.TouchEvent.TOUCH_TAP,this.startOnClick,this);
}
//点击开始的回调
private startOnClick(event:egret.TouchEvent):void{
if(this.channel){
this.channel.stop();
}
this.channel = this.sound.play(0,1);
}
//监听停止按钮的方法
private CloseStartControl():void{

var btn_clostSound :egret.Sprite = new egret.Sprite();
btn_clostSound.graphics.beginFill(0x0fff00);
btn_clostSound.graphics.drawCircle(100,100,20);
btn_clostSound.graphics.endFill();
btn_clostSound.width = 200;
btn_clostSound.height = 200;

var lable_close:egret.TextField =new egret.TextField();
lable_close.text = "停止";
lable_close.x = 100;
lable_close.y = 100;

this.addChild(btn_clostSound);
this.addChild((lable_close));
btn_clostSound.touchEnabled = true;
btn_clostSound.addEventListener(egret.TouchEvent.TOUCH_TAP,this.CloseOnClick,this);
}
//停止按钮的回调
private CloseOnClick(event:egret.TouchEvent):void{
if(this.channel){
this.channel.stop();
this.channel = null;
}
}

}

生成一个新的 SoundChannel 对象来播放该声音。此方法返回 SoundChannel 对象，访问该对象可停止声音调整音量。
* @param startTime 应开始播放的初始位置（以秒为单位），默认值是 0
* @param loops 播放次数，默认值是 0，循环播放。 大于 0 为播放次数，如 1 为播放 1 次；小于等于 0，为循环播放。