177 lines
3.7 KiB
Markdown
177 lines
3.7 KiB
Markdown
# AudioManager的使用 #
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通过 AudioManager 类 加载音频并播放音频
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# 函数声明 #
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通过调用 createSound 方法返回 Sound 音频源 对象
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> public createSound (url:string, success:Function=null, error:Function=null):Sound
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通过调用 playSound 方法返回 Channel 对象 Channel 类控制应用程序中的声音
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> public playSound(sound: Sound, options: any)
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AudioManager.instance.createSound("../resource/audio/1.mp3", (e) => {
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//Channel 类控制应用程序中的声音
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this._channel = AudioManager.instance.playSound(e, { "volume": 0.5, "loop": true });
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this._channel.play();
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})
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# 示例 #
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在以下示例中，用户可暂停并重放声音文件
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private _channel: egret3d.Channel;
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private _sound: egret3d.Sound;
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private _txt: gui.UITextField;
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private _btnPlay: gui.UILabelButton;
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private _btnStop: gui.UILabelButton;
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private _btnPause: gui.UILabelButton;
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private startTime: number = 0;
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public initedGui() {
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this._txt = new gui.UITextField();
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this._txt.text = "Time：" + this.startTime;
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this._btnPlay = new gui.UILabelButton();
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this._btnPlay.label = "Play";
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this._btnPlay.width = 35;
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this._btnPlay.height = 20;
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this._btnPlay.x = 0;
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this._btnPlay.y = 50;
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this._btnStop = new gui.UILabelButton();
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this._btnStop.label = "Stop";
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this._btnStop.width = 35;
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this._btnStop.height = 20;
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this._btnStop.x = 40;
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this._btnStop.y = 50;
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this._btnPause = new gui.UILabelButton();
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this._btnPause.label = "Pause";
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this._btnPause.width = 35;
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this._btnPause.height = 20;
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this._btnPause.x = 80;
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this._btnPause.y = 50;
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this._view.addGUI(this._txt);
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this._view.addGUI(this._btnPlay);
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this._view.addGUI(this._btnStop);
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this._view.addGUI(this._btnPause);
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this.initListener();
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}
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注册监听事件
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private initListener() {
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var self = this;
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self._btnPlay.addEventListener(egret3d.MouseEvent3D.MOUSE_CLICK, (e) => {
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if (this._channel) {
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if (!this._channel.isPlaying()) {
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this._channel.unpause();//播放处于暂停状态的音频
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}
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}
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else {
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AudioManager.instance.createSound("../resource/audio/music.mp3", (e) => {
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this._sound = e;
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this._channel = AudioManager.instance.playSound(self._sound, { "volume": 0.5, "loop": true });
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this._channel.play();
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})
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}
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}, this);
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self._btnStop.addEventListener(egret3d.MouseEvent3D.MOUSE_CLICK, (e) => {
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this._channel.stop();
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this.startTime = 0;
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this._txt.text = "Time：" + self.startTime;
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}, this);
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self._btnPause.addEventListener(egret3d.MouseEvent3D.MOUSE_CLICK, (e) => {
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if (this._channel.isPlaying())//如果媒体文件被暂停，则返回true，否则返回false
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this._channel.pause();//暂停处于播放状态的音频
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}, this);
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var drawMeter = function () {
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if (self._channel && self._channel.isPlaying()) {
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self._txt.text = "Time：" + self.startTime++;
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}
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requestAnimationFrame(drawMeter);
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}
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requestAnimationFrame(drawMeter)
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}
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运行结果如图所示
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