如何解决iOS 11 Safari getUserMedia“无效约束”问题 [英] How to resolve iOS 11 Safari getUserMedia "Invalid constraint" issue

问题描述

我正在尝试在iOS 11中的Safari中运行以下代码。它应该提示用户访问其设备相机，然后将其显示在我的< video autoplay id =video中>< / video> 元素。但是，在iOS 11中运行时，会导致抛出 OverconstrainedError ：

I'm attempting to run the following code in Safari in iOS 11. It should prompt the user to give access to their devices camera and then display it in my <video autoplay id="video"></video> element. However, when running in iOS 11, it results in an OverconstrainedError to be thrown:

{message: "Invalid constraint", constraint: ""}

• 代码在Android中正常运行并成功打开相机。


• 我尝试了多个有效配置而没有运气。



我知道iOS 11刚出来所以它可能是一个bug，但是有什么想法吗？有没有其他人遇到这个？

I know iOS 11 just came out so it may be a bug, but any thoughts? Has anyone else run into this?

代码：

var video = document.getElementById('video');
if(navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
     navigator.mediaDevices.getUserMedia({video: true})
         .then(function(stream) {
             video.src = window.URL.createObjectURL(stream);
             video.play();
         })
         .catch(function(err) {
             console.log(err);
         });
}





---





编辑1





我运行 navigator.mediaDevices.getSupportedConstraints（）并返回以下内容：

{
    aspectRatio: true,
    deviceid: true,
    echoCancellation: false,
    facingMode: true,
    frameRate: true,
    groupId: true,
    height: true,
    sampleRate: false,
    sampleSize: false,
    volume: true,
    width: true
}

我试过配置省略视频属性，但没有运气。

I've tried configurations omitting the video property, but had no luck.

推荐答案

它似乎是一个被纠正的错误，因为我只是再次尝试并且错误消息不再出现。

It appears to have been a bug that was corrected, because I just tried it again and the error message no longer appears.

请注意，虽然错误消息消失了，但我做了必须再做一次更改才能正常工作，这是在 t中添加 video.srcObject = stream; 母鸡回调。

Note that while the error message went away, I did have to make one more change for it to work, which was adding video.srcObject = stream; in the then callback.

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