uniapp 使用camera组件  自定义扫一扫界面 一直扫描不出二维码来, onScanCode一直没有被调用

<template>

<view class="scan-view">

<!-- <camera class='scan-camera' mode="scanCode" binderror="cameraError" bindscancode='scancode' frame-size='large'> -->

<camera class='scan-camera' mode="scanCode" @error="onCameraError" @scancode="onScanCode" @ready="onCameraInit"

frame-size='large' device-position="back" flash="off">

<view class="boxs">

<view class="qr-scanner">

<view class="box">

<view class="line"></view>

</view>

</view>

<view class='cover-corner cover-left-top'></view>

<view class='cover-corner cover-right-top'></view>

<view class='cover-corner cover-left-bottom'></view>

<view class='cover-corner cover-right-bottom'></view>

</view>

</camera>

</view>

</template>

<script>

export default {

data() {

return {

hasScan: false, // 是否扫描成功 

}

},

methods: {

onScanCode(e) {

console.log(e)

// 若扫描成功，不进行后续处理

if (this.data.hasScan) {

return

}

},

},

}

</script>

追加: 我发现在进行真机调试的时候不回调用onScanCode, 单独在手机上运行开发版本的时候能扫码识别成功并且调用onScanCode