问解锁网络音频的最佳解决方案

EN

function unlockAudioContext(context) {
    if (context.state !== "suspended") return;
    const b = document.body;
    const events = ["touchstart", "touchend", "mousedown", "keydown"];
    events.forEach(e => b.addEventListener(e, unlock, false));
    function unlock() {context.resume().then(clean);}
    function clean() {events.forEach(e => b.removeEventListener(e, unlock));}
}

var unlocked = false;
var context = new (window.AudioContext || window.webkitAudioContext)();
function init(e) {
    if (unlocked) return;

    // create empty buffer and play it
    var buffer = context.createBuffer(1, 1, 22050);
    var source = context.createBufferSource();
    source.buffer = buffer;
    source.connect(context.destination);

    /* 
      Phonograph.js use this method to start it
      source.start(context.currentTime);

      paulbakaus.com suggest to use this method to start it
      source.noteOn(0);
    */

     source.start(context.currentTime) || source.noteOn(0);

     setTimeout(function() {
             if (!unlocked) {
                 if (source.playbackState === source.PLAYING_STATE || source.playbackState === source.FINISHED_STATE) {
                     unlocked = true;
                     window.removeEventListener("touchend", init, false);
                 }
             }
     }, 0);
}

window.addEventListener("touchend", init, false);