以下内容 间接放入即可 亲测无效

单张下载

<!-- HTML --><div @click="saveImage"> 下载图片 </div>
/* methods */saveImage() {          wx.downloadFile({              url:'http://upload.jianshu.io/admin_banners/web_images/4435/c1d3ca63353c8bd527f0d781605516cb5b266d02.jpg?imageMogr2/auto-orient/strip|imageView2/1/w/1250/h/540',              success: function(res) {                  if (res.statusCode === 200) {                      let img = res.tempFilePath;                      wx.saveImageToPhotosAlbum({                          filePath: img,                          success(res) {                              console.log('胜利')                          },                          fail(res) {                              console.log('保留失败')                          }                      });                  }              }          });      }

多张下载

<!-- HTML --><div @click="saveImage"> 下载图片 </div>
/* methods */saveImage() {          let picArr=['http://upload.jianshu.io/admin_banners/web_images/4435/c1d3ca63353c8bd527f0d781605516cb5b266d02.jpg','http://47.102.105.248:8805/img-api/202007/24/1595585519996221273.png']          this.xiazaiTupian(picArr)      },      //下载内容      xiazaiTupian: function(picArr,index) {          let that=this;          index=index||0;          console.log(picArr[index])          wx.downloadFile({              url: picArr[index],              success: function (res) {                  var temp = res.tempFilePath                  console.log(index)                  console.log(temp)                  wx.saveImageToPhotosAlbum({                      filePath: temp,                      success: function () {                          index+=1;                          if (index < picArr.length){                              that.xiazaiTupian(picArr, index);                          }else{                              wx.showToast({                                  title: '下载实现',                              })                          }                      },                      fail: function () {                          index += 1;                          if (index < picArr.length) {                              that.xiazaiTupian(picArr, index);                          } else {                              wx.showToast({                                  title: '下载实现',                              })                          }                          wx.showToast({                              title: '第' + (index+1) + '下载失败',                          })                      }                  })              },              fail: function (res) {                  wx.showToast({                      title: '下载失败',                  })              }          })      },