原生IOS嵌入vue打包的H5，在H5中调用原生摄像头扫码，且扫描回调返回数据

<div class="code">
		<img class="scan" src="../assets/images/scan.png" alt="" @click.stop="openQrcode('camera')" />
		<input class="input" type="number" placeholder="请输入核销码1" v-model="code" />
</div>

methods: {
// ios的扫码回调
	camera(str){
		this.code=str;
	},
    openQrcode() {
         window.webkit.messageHandlers.toscan.postMessage('camera')
    }
}，
created: function () {
		window.camera = this.camera;
},