微信公众号上传图片功能

基于Vant 组件库+微信公众号开发文档

html部分

js部分

import Vue from "vue";
import { Toast,} from "vant";
Vue.use(Toast);
export default {
  data() {
    return {
      images: {
        localId: [],
        serverId: []
      },
      img_i: 0,
      uploadimg: false,
      imgArr: [],
      imgIdsArr: []
	}
 },
 methods:{
 // 删除图片
  delImg(index) {
      this.imgArr.splice(index, 1);
      this.imgIdsArr.splice(index, 1);
    },
    // 获取微信的sdk
     signatureJSSDK() {
      //var url = "http://zhsqtest.xyre.com/WeChatPublic/index.html";//后台需要此页面的url来生成参数
      // var url = window.location.href.split('#')[0];//后台需要此页面的url来生成参数
      var url = encodeURIComponent(window.location.href.split("#")[0]); //后台需要此页面的url来生成参数
      this.$http
        .get("/wechat/image/sign?url=" + url, {})
        .then(res => {
          wx.config({
            debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
            appId: res.data.appId, // 必填，公众号的唯一标识
            timestamp: res.data.timestamp, // 必填，生成签名的时间戳
            nonceStr: res.data.noncestr, // 必填，生成签名的随机串
            signature: res.data.signature, // 必填，签名，见附录1
            jsApiList: [
              // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
              "chooseImage",
              "previewImage",
              "uploadImage",
              "downloadImage",
              "translateVoice"
            ]
          });
          console.log("微信签名", wx.config);
        })
        .catch(e => {
          console.log("签名失败", e);
        });
    },
    chooseImg(e) {
      let that = this;
      wx.ready(() => {
        wx.chooseImage({
          count: 9 - this.imgArr.length, // 最多可以选择的图片张数，默认9
          sizeType: ["original", "compressed"], // original 原图，compressed 压缩图，默认二者都有
          sourceType: ["album", "camera"], // album 从相册选图，camera 使用相机，默认二者都有
          complete: function(res) {
            console.log("chooseImage", res);
            that.img_i = 0;
            if (res.errMsg == "chooseImage:ok") {
              that.images.localId = res.localIds;
              if (that.images.localId.length > 0) {
                setTimeout(that.upload, 100);
              }
            } else if (res.errMsg == "chooseImage:cancel") {
            } else {
              Toast("获取图片失败，请重新选择");
            }
          }
        });
      });
    },
    upload() {
      let that = this;
      wx.uploadImage({
        localId: that.images.localId[that.img_i],
        complete: function(res) {
          that.img_i++;
          if (res.errMsg == "uploadImage:ok") {
            that.images.serverId.push(res.serverId);
            that.uploadimg = true;
            console.log("上传图片", res.serverId);
            that.$http
              .post("/wechat/image/saveImageToWx?mediaId=" + res.serverId)
              .then(res => {
                var objd = res.data.obj;
                var src = objd.filePath;
                that.imgArr.push(objd.filePath);
                var fileId = objd.fileId;
                that.imgIdsArr.push(fileId);
              })
              .catch(e => {
                console("e" + e);
              });
          }

          if (that.img_i < that.images.localId.length) {
            setTimeout(that.upload, 100);
          }
        }
      });
    },
  },
  mounted(){
   this.signatureJSSDK(); // 获取签名
  }
}