The AudioContext was not allowed to start(解决方案)

浏览器播放音频，显示正在播放中缺没有声音，控制台警告：

The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page.

网上的解决方案是:

chrom浏览器：

地址栏中输入chrome://flags/#autoplay-policy;

将Default换成No user gesture is required

设置成功但是依然没有效果

然后我在代码中加入了这句就可以了：

navigator.mediaDevices.getUserMedia({ audio: true });

MediaDevices.getUserMedia() 会提示用户给予使用媒体输入的许可，媒体输入会产生一个MediaStream，里面包含了请求的媒体类型的轨道。getUserMedia的参数是一个包含了video 和 audio两个成员的MediaStreamConstraints 对象，例如

以下同时请求不带任何参数的音频和视频：

{ audio: true, video: true }

如果设置以上还不行，那就需要你添加一个点击事件，需要播放的时候，模拟点击就可以播放了。

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