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我正在使用iOS6中的WebAudio API執行一些測試。看起來,當你點擊一個按鈕時,AudioBufferSourceNode將被正確創建並連接到上下文目標。在iOS 6中自動播放WebAudio API
我只是想知道是否有任何加載頁面時自動播放聲音的方式,因爲iOS6設備似乎正確構建SourceNode,但沒有聲音出現。
我已張貼下面我的代碼:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML 5 WebAudio API Tests</title>
<script type="text/javascript">
var audioContext,
audioBuffer;
function init() {
try {
audioContext = new webkitAudioContext();
initBuffer('resources/dogBarking.mp3');
} catch(e) {
console.error('webkitAudioContext is not supported in this browser');
}
}
function initBuffer(desiredUrl) {
var url = desiredUrl || '';
var request = new XMLHttpRequest();
request.open("GET", url, true);
request.responseType = "arraybuffer";
request.onload = function() {
audioContext.decodeAudioData(request.response, function(buffer) {
audioBuffer = buffer;
}, onError);
}
request.send();
}
function playSound(startTime, endTime) {
var audioSource = audioContext.createBufferSource();
audioSource.buffer = audioBuffer;
audioSource.connect(audioContext.destination);
audioSource.noteOn(0);
audioSource.noteOff(10);
}
</script>
</head>
<body onload="init()">
<script type="text/javascript">
(function() {
var buttonNode = document.createElement('input');
buttonNode.setAttribute('type', 'button');
buttonNode.setAttribute('name', 'playButton');
buttonNode.setAttribute('onclick', 'playSound(0, 1)')
buttonNode.setAttribute('value', 'playSound()');
document.body.appendChild(buttonNode);
document.write('<a id="test" onclick="playSound(0, 2)">hello</a>');
var testLink = document.getElementById('test');
var dispatch = document.createEvent('HTMLEvents');
dispatch.initEvent("click", true, true);
testLink.dispatchEvent(dispatch);
}());
</script>
</body>
</html>
我希望這是有道理的。 親切的問候, 傑米。