vue 二维码长按保存和复制内容操作

    
  
  

    长按保存至相册
    
  
  

          {{shareUrl}}
          复制
 

doCopy() {
      this.$copyText(this.shareUrl).then(function (e) {
        alert('Copied')
        console.log(e)
      }, function (e) {
        alert('Can not copy')
        console.log(e)
      })
    }
　　

import QRCode from 'qrcode'
export default {
  data() {
    return {
      codes: '',
      imgUrl:''
    }
  },
  components: {
    QRCode: QRCode
  },
  methods: {
    useqrcode() {//生成二维码
      let canvas = document.getElementById('canvas')
      let url="http://www.baidu.com"
      QRCode.toCanvas(canvas, url, function(error) {
        if (error) { console.error(error) } else { console.log('success!'); }
      })
      this.saveImg()//保存图片
    },
    //保存图片
    saveImg(){
      let myCanvas = document.getElementsByTagName('canvas');
      this.imgUrl=myCanvas[0].toDataURL('image/png')             
    },
  },
  mounted() {
    this.useqrcode(); //生成二维码    
  }
}