本篇内容主要讲解“Babylon.js中AudioContext was not allowed to start异常问题怎么解决”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“Babylon.js中AudioContext was not allowed to start异常问题怎么解决”吧!
BabylonJS中使用音频引擎时遇到错误
当在BabylonJS中使用音频引擎时，可能会遇到以下错误：
audioEngine.ts:172 The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu
这个错误是因为浏览器的安全策略要求音频上下文必须在用户事件（例如单击、键盘按键等）中启用。这意味着，如果您尝试在没有用户事件的情况下自动播放音乐，则会抛出此错误。
为了解决这个问题，我们需要启用音频上下文。在BabylonJS中，可以通过AudioEngine()类来创建音频上下文。
您可以使用以下代码在用户事件触发后启用音频上下文：
let audioContext = new AudioEngine().audioContext;audioContext.resume();在以上示例中，我们创建了一个AudioEngine实例，并从中获取了音频上下文。接下来，我们调用resume()方法启用音频上下文。请注意，在启用之前，必须先检查音频上下文是否存在。如果不存在，则需要将其创建。
这样就可以成功地启用音频上下文，然后您可以在BabylonJS中播放音频文件而不会遇到错误。
示例源码(修改前)：
playingSoundSprites = (scene: Scene, canvas: HTMLCanvasElement) => { var freeCamera = new FreeCamera("freeCamera", new Vector3(0, 0, 0), scene); var theSound = new Sound("allSounds", "https://playground.babylonjs.com/sounds/6sounds.mp3", scene, null, {autoplay: false}); var isPlaying = 0; let audioContext = new AudioEngine().audioContext; var soundArray = [ [0.0, 5.000], [5.100, 6.600], [12.000, 1.600], [14.000, 9.200], [23.000, 7.900], [31.000, 2.800], ]; theSound.onended = function() { isPlaying = 0; console.log("not playing"); }; var advanceTexture = AdvancedDynamicTexture.CreateFullscreenUI("UI"); var uiPanel = new StackPanel(); uiPanel.width = "220px"; uiPanel.fontSize = "14px"; uiPanel.horizontalAlignment = Control.HORIZONTAL_ALIGNMENT_CENTER; uiPanel.verticalAlignment = Control.VERTICAL_ALIGNMENT_CENTER; advanceTexture.addControl(uiPanel); var button = Button.CreateSimpleButton("but", "Play All Sounds"); button.paddingTop = "10px"; button.width = "150px"; button.height = "50px"; button.color = "white"; button.background = "green"; button.onPointerDownObservable.add(function() { if (isPlaying === 0) { isPlaying = 1; theSound.play(); console.log("playing"); } }); uiPanel.addControl(button); var button1 = Button.CreateSimpleButton("but1", "Play Random Sound"); button1.paddingTop = "10px"; button1.width = "150px"; button1.height = "50px"; button1.color = "white"; button1.background = "green"; button1.onPointerDownObservable.add(function() { if (isPlaying === 0) { isPlaying = 1; var randomSound = Math.floor(Math.random() * 6); theSound.play(0, soundArray[randomSound][0], soundArray[randomSound][1]); console.log("playing"); } }); uiPanel.addControl(button1); return scene; }运行结果如下：
不能播放声音，在浏览器控制台
查看日志如下：
The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://goo.gl/7K7WLu
示例源码（修改后）：
playingSoundSprites = (scene: Scene, canvas: HTMLCanvasElement) => { var freeCamera = new FreeCamera("freeCamera", new Vector3(0, 0, 0), scene); var theSound = new Sound("allSounds", "https://playground.babylonjs.com/sounds/6sounds.mp3", scene, null, {autoplay: false}); var isPlaying = 0; var soundArray = [ [0.0, 5.000], [5.100, 6.600], [12.000, 1.600], [14.000, 9.200], [23.000, 7.900], [31.000, 2.800], ]; theSound.onended = function() { isPlaying = 0; console.log("not playing"); }; var advanceTexture = AdvancedDynamicTexture.CreateFullscreenUI("UI"); var uiPanel = new StackPanel(); uiPanel.width = "220px"; uiPanel.fontSize = "14px"; uiPanel.horizontalAlignment = Control.HORIZONTAL_ALIGNMENT_CENTER; uiPanel.verticalAlignment = Control.VERTICAL_ALIGNMENT_CENTER; advanceTexture.addControl(uiPanel); var button = Button.CreateSimpleButton("but", "Play All Sounds"); button.paddingTop = "10px"; button.width = "150px"; button.height = "50px"; button.color = "white"; button.background = "green"; button.onPointerDownObservable.add(function() { let audioContext = new AudioEngine().audioContext; audioContext!.resume().then(() => { if (isPlaying === 0) { isPlaying = 1; theSound.play(); console.log("playing"); } }); }); uiPanel.addControl(button); var button1 = Button.CreateSimpleButton("but1", "Play Random Sound"); button1.paddingTop = "10px"; button1.width = "150px"; button1.height = "50px"; button1.color = "white"; button1.background = "green"; button1.onPointerDownObservable.add(function() { let audioContext = new AudioEngine().audioContext; audioContext!.resume().then(() => { if (isPlaying === 0) { isPlaying = 1; var randomSound = Math.floor(Math.random() * 6); theSound.play(0, soundArray[randomSound][0], soundArray[randomSound][1]); console.log("playing"); } }); }); uiPanel.addControl(button1); return scene; }到此，相信大家对“Babylon.js中AudioContext was not allowed to start异常问题怎么解决”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
