最近刚开发好一个企业内部使用的小程序，用了camera做人脸截取，但是部分手机调起camera时出现黑屏现象，两台iphone11，一台ios13.4.1正常，一台ios13.5.2一开始正常，后来出现黑屏且一直无法调起前置，手机相机没问题，还有vivo iqoo偶尔会出现黑屏现象；

<zan-pop type="bottom" show="{{camera_show}}" bindclose="togglePopup">

    <view class="camera content">

        <camera device-position="front" flash="off" binderror="error" style="width: 100vw; height: {{camera_h}};z-index:0" wx:if="{{camera_show}}">camera>

        <cover-view class="mc_wrap">

            <cover-image class="w-p100 h-p100" src="../../common/images/camera_bg.png">cover-image>

            <cover-view class="tips c-white txt-c h5">请调整人脸角度后点击下方按钮cover-view>

        cover-view>

        <cover-view class="camera_wrap">

            <cover-view class="camera_btn_wrap flex flex-c"  bindtap="takePhoto">

                <cover-view class="camera_btn h4 c-5 flex flex-c" hover-class="take">cover-view>

            cover-view>

        cover-view>

        <cover-view class="close" bindtap="togglePopup">

            <cover-image src="../../common/images/close.png">cover-image>

        cover-view>

    view>

zan-pop>

let camera_show = this.data.camera_show,
            that = this;
        wx.getSetting({
            success(res) {
                console.log(res)
                if (res.authSetting['scope.camera'] != undefined && !res.authSetting['scope.camera']) { //非初始化进入该页面,且未授权
                    wx.showModal({
                        title: '是否授权摄像头功能功能',
                        content: '需要授权使用摄像头功能，请确认授权，否则无法使用',
                        success: function (res) {
                            if (res.cancel) {
                                wx.showToast({
                                    title: '授权失败',
                                    icon: 'none',
                                    duration: 1000
                                })
                            } else if (res.confirm) {
                                wx.openSetting({
                                    success: function (dataAu) {
                                        if (dataAu.authSetting["scope.camera"]) {
                                            wx.showToast({
                                                title: '授权成功',
                                                icon: 'success',
                                                duration: 1000
                                            })
                                            that.setData({
                                                camera_show: true
                                            })
                                        } else {
                                            wx.showToast({
                                                title: '授权失败',
                                                icon: 'none',
                                                duration: 1000
                                            })
                                        }
                                    }
                                })
                            }
                        }
                    })
                } else {
                    that.setData({
                        camera_show: !camera_show
                    })
                }
            }
        })