QrScan.vue
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<template>
<div class="qrcode">
<div id="reader">
</div>
</div>
</template>
<script>
import {
Html5Qrcode
} from 'html5-qrcode';
export default {
created() {
this.getCameras();
navigator.mediaDevices.getUserMedia({
video: true
})
.then(stream => {
this.$refs.qrcodeReader.$refs.reader.$refs.video.srcObject = stream
})
.catch(error => {
console.log(error)
// alert(error)
})
},
beforeDestroy() {
this.stop();
},
methods: {
getCameras() {
Html5Qrcode.getCameras()
.then((devices) => {
if (devices && devices.length) {
this.html5QrCode = new Html5Qrcode('reader');
this.start();
}
})
.catch((err) => {
// handle err
this.html5QrCode = new Html5Qrcode('reader');
this.error = 'ERROR: 您需要授予相机访问权限';
this.$emit('err', this.error, err);
});
},
start() {
//environment后置 user前置
this.html5QrCode
.start({
facingMode: 'environment'
}, {
fps: 10, // 设置每秒多少帧
aspectRatio: 1,
qrbox: 250, // 设置取景范围
colorDark: '#0000ff', //加深二维码黑色部分的颜色提高识别度
colorLight: '#ffffff', //这个应该是提高非黑即白部分的亮度 提高识别度
visualFeedback: true, //开启视觉反馈 没有体会到
halfSample: true, //缩小二维码提高识别精度吧
},
(decodedText) => {
this.$emit('ok', decodedText);
},
)
.catch((err) => {
this.$emit('err', err);
});
},
stop() {
this.html5QrCode
.stop()
.then((ignore) => {
// QR Code scanning is stopped.
this.$emit('err', ignore);
console.log('QR Code scanning stopped.');
})
.catch((err) => {
this.$emit('err', err);
// Stop failed, handle it.
console.log('Unable to stop scanning.');
});
},
},
};
</script>
<style lang="scss" scoped>
.qrcode {
position: absolute;
height: 100%;
width: 100%;
// background: rgba($color: #000000, $alpha: 0.48);
background:rgba(0, 0, 0, 1.48);
}
#reader {
top: 45%;
left: 0;
transform: translateY(-50%);
}
</style>