function webAudio(options){ //public this.volume = parseInt(options.volume || 100) ; // 音量控制单元,值为Number类型,范围为0-100 this.url = options.url || '' ; // 音频资源url,值类型为String类型 this.autoPlay = !!options.autoPlay; // 是否加载完成自动播放,值类型为Boolean类型 this.loopPlay = !!options.loopPlay; // 是否循环播放,值类型为Boolean类型 //private this.buffer = null; this.context = null; this.sourceAudio = null; this.gainNode = null; this.loadReady = false; //初始化 this.init = function () { window.AudioContext = window.AudioContext || window.webkitAudioContext || window.mozAudioContext || window.msAudioContext; if(!AudioContext){ console.error("您的浏览器不支持HTML5 audio API"); return } this.context = new AudioContext(); this.loadResource(); } //下载音频资源 this.loadResource = function () { var _this = this; var xhr = new XMLHttpRequest(); xhr.open('GET',this.url,true); xhr.responseType = 'arraybuffer'; xhr.onload = function () { _this.context.decodeAudioData(xhr.response,function (buffer) { _this.buffer = buffer; _this.prepareAudio(); this.loadReady = true; }) } xhr.send(); } //是否自动播放 this.prepareAudio = function () { this.autoPlay ? this.startAudio() : ''; } //创建音频 this.createAudio = function () { this.sourceAudio = this.context.createBufferSource();//创建一个音频源 相当于是装音频的容器 this.sourceAudio.buffer = this.buffer;// 告诉音频源 播放哪一段音频 this.gainNode = this.context.createGain();//调节音量 this.sourceAudio.connect(this.gainNode); this.changeVolume();//声音 this.sourceAudio.loop = this.loopPlay;//循环 this.gainNode.connect(this.context.destination);// 连接到输出源 } //重新播放 this.startAudio = function () { this.createAudio(); this.sourceAudio.start(0);//开始播放 } //改变音量 this.changeVolume = function (num) { num = num || 0; this.gainNode.gain.value = (this.volume += num) / 100; } //播放转为暂停 this.pauseAudio = function () { this.gainNode.disconnect(this.context.destination) } //暂停转为播放 this.playAudio = function () { this.gainNode.connect(this.context.destination) } //停止播放 this.stopAudio = function () { this.sourceAudio.stop() } //减小声音 this.decVolume = function () { if(this.volume >= 10){ this.changeVolume(-10); } } //增大声音 this.ascVolume = function () { if(this.volume <= 90){ this.changeVolume(10); } } //静音 this.quietVolume = function () { this.gainNode.gain.value = 0; } //静音恢复 this.recoverVolume = function () { this.changeVolume() } //当前音量 this.getVolume = function () { return (this.gainNode.gain.value).toFixed(2) * 100; } this.init(); return this; } window.test = new webAudio({ volume:100, url:'1.mp3', autoPlay:true, loopPlay:true }); //控制台事件 var pauseEle = document.getElementById("pause"); pauseEle.onclick = function() { if (pauseEle.alt === 'Pause') { test.pauseAudio(); } else { test.playAudio(); } }增加播放暂停图片切换 实例
时间: 2024-03-26 08:36:11 浏览: 120
month.rar_JavaScript/JQuery_Java_
您想要将播放暂停的图片进行切换,可以在HTML中添加两个图片,一个表示播放,一个表示暂停,然后在JavaScript中根据当前状态进行切换。例如:
HTML代码:
```html
<img id="playPauseBtn" src="play.png">
```
JavaScript代码:
```javascript
var playPauseBtn = document.getElementById('playPauseBtn');
// 控制播放暂停
playPauseBtn.onclick = function() {
if (test.context.state === 'suspended') {
test.playAudio();
playPauseBtn.src = 'pause.png';
} else {
test.pauseAudio();
playPauseBtn.src = 'play.png';
}
};
```
当用户点击图片时,会判断当前音频的状态,如果是暂停状态,则继续播放,并将图片切换为暂停图标;如果是播放状态,则暂停播放,并将图片切换为播放图标。
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