项目初始化

gaoluyang

3 天以前 92230c9a97dc9ce9df3313d11d26999c04bb6b26

 src/components/geek-xd/components/geek-qrcode/geek-qrcode.vue

¶Ô±ÈÐÂÎļþ
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<template xlang="wxml" minapp="mpvue">
   <view class="geek-qrcode">
      <canvas class="geek-qrcode-canvas" :canvas-id="cid" :style="{width:cpSize+'px',height:cpSize+'px'}" />
      <image v-show="show" :src="result" :style="{width:cpSize+'px',height:cpSize+'px'}" />
   </view>
</template>

<script>
import QRCode from "./qrcode.js"
let qrcode
export default {
   name: "geek-qrcode",
   props: {
      cid: {
         type: String,
         default: 'geek-qrcode-canvas'
      },
      size: {
         type: Number,
         default: 200
      },
      unit: {
         type: String,
         default: 'upx'
      },
      show: {
         type: Boolean,
         default: true
      },
      val: {
         type: String,
         default: ''
      },
      background: {
         type: String,
         default: '#ffffff'
      },
      foreground: {
         type: String,
         default: '#000000'
      },
      pdground: {
         type: String,
         default: '#000000'
      },
      icon: {
         type: String,
         default: ''
      },
      iconSize: {
         type: Number,
         default: 40
      },
      lv: {
         type: Number,
         default: 3
      },
      onval: {
         type: Boolean,
         default: false
      },
      loadMake: {
         type: Boolean,
         default: false
      },
      usingComponents: {
         type: Boolean,
         default: true
      },
      showLoading: {
         type: Boolean,
         default: true
      },
      loadingText: {
         type: String,
         default: '二维码生成中'
      },
   },
   data() {
      return {
         result: '',
      }
   },
   methods: {
      _makeCode() {
         let that = this
         if (!this._empty(this.val)) {
            qrcode = new QRCode({
               context: that, // ä¸Šä¸‹æ–‡çŽ¯å¢ƒ
               canvasId:that.cid, // canvas-id
               usingComponents: that.usingComponents, // æ˜¯å¦æ˜¯è‡ªå®šä¹‰ç»„件
               showLoading: that.showLoading, // æ˜¯å¦æ˜¾ç¤ºloading
               loadingText: that.loadingText, // loading文字
               text: that.val, // ç”Ÿæˆå†…容
               size: that.cpSize, // äºŒç»´ç å¤§å°
               background: that.background, // èƒŒæ™¯è‰²
               foreground: that.foreground, // å‰æ™¯è‰²
               pdground: that.pdground, // å®šä½è§’点颜色
               correctLevel: that.lv, // å®¹é”™çº§åˆ«
               image: that.icon, // äºŒç»´ç å›¾æ ‡
               imageSize: that.iconSize,// äºŒç»´ç å›¾æ ‡å¤§å°
               cbResult: function (res) { // ç”ŸæˆäºŒç»´ç çš„回调
                  that._result(res)
               },
            });
         } else {
            uni.showToast({
               title: '二维码内容不能为空',
               icon: 'none',
               duration: 2000
            });
         }
      },
      _clearCode() {
         this._result('')
         qrcode.clear()
      },
      _saveCode() {
         let that = this;
         if (this.result != "") {
            uni.saveImageToPhotosAlbum({
               filePath: that.result,
               success: function () {
                  uni.showToast({
                     title: '二维码保存成功',
                     icon: 'success',
                     duration: 2000
                  });
               }
            });
         }
      },
      _result(res) {
         this.result = res;
         this.$emit('result', res)
      },
      _empty(v) {
         let tp = typeof v,
            rt = false;
         if (tp == "number" && String(v) == "") {
            rt = true
         } else if (tp == "undefined") {
            rt = true
         } else if (tp == "object") {
            if (JSON.stringify(v) == "{}" || JSON.stringify(v) == "[]" || v == null) rt = true
         } else if (tp == "string") {
            if (v == "" || v == "undefined" || v == "null" || v == "{}" || v == "[]") rt = true
         } else if (tp == "function") {
            rt = false
         }
         return rt
      }
   },
   watch: {
      size: function (n, o) {
         if (n != o && !this._empty(n)) {
            this.cSize = n
            if (!this._empty(this.val)) {
               setTimeout(() => {
                  this._makeCode()
               }, 100);
            }
         }
      },
      val: function (n, o) {
         if (this.onval) {
            if (n != o && !this._empty(n)) {
               setTimeout(() => {
                  this._makeCode()
               }, 0);
            }
         }
      }
   },
   computed: {
      cpSize() {
         if(this.unit == "upx"){
            return uni.upx2px(this.size)
         }else{
            return this.size
         }
      }
   },
   mounted: function () {
      if (this.loadMake) {
         if (!this._empty(this.val)) {
            setTimeout(() => {
               this._makeCode()
            }, 0);
         }
      }
   },
}
</script>
<style>
.geek-qrcode {
  position: relative;
}
.geek-qrcode-canvas {
  position: fixed;
  top: -99999upx;
  left: -99999upx;
  z-index: -99999;
}
</style>