微信云开发环境里可以调用万象优图接口处理图片

chooseImage(){
    random=Math.random().toString();//随机文件名
    wx.chooseImage({
      count: 1,
      sizeType: ['original', 'compressed'],
      sourceType: ['album', 'camera'],
      success (res) {
        // tempFilePath可以作为img标签的src属性显示图片
        var tmpUrl = res.tempFilePaths[0]
        getCurrentPages()[0].setData({"imgSrc":tmpUrl})
        wx.cloud.uploadFile({//上传到微信云开发的云存储
          cloudPath: random,
          filePath: tmpUrl, // 文件路径
          success: res => {
            // get resource ID
            fileIDs = [res.fileID];
            wx.cloud.getTempFileURL({ //获取临时文件名
              fileList:fileIDs,
              success:res=>{
                wx.request({
                  url:res.fileList[0].tempFileURL+"?imageAve", //通过临时文件名调用万象优图的imageAVe接口
                  success:(res)=>{
                    var sRGB = res.data.RGB.substr(2);
                    getCurrentPages()[0].setData({"avgColor2":"#"+sRGB})
                    var rgb=[
                      parseInt(sRGB.substr(0,2),16),
                      parseInt(sRGB.substr(2,2),16),
                      parseInt(sRGB.substr(4,2),16)
                    ]
                    var hsv = rgbToHsv(rgb);
                    getCurrentPages()[0].setData({"avgColor1":"rgb("+hsvToRgb([hsv[0]*1,hsv[1]*1,hsv[2]*0.8]).join()+")"});
                    getCurrentPages()[0].setData({"avgColor3":"rgb("+hsvToRgb([hsv[0]*1,hsv[1]*1,hsv[2]*1.25]).join()+")"});
                    wx.cloud.deleteFile({ //删除临时文件
                      fileList: fileIDs,
                      success: res => {
                        console.log("临时文件已删除")
                      }
                    })
                  },
                  fail:(err)=>{
                    console.log(err)
                  }
                })
              }
            })
            
            
          },
          fail: err => {
            console.log(err)
            // handle error
          }
        })
      }
    })
  }

function rgbToHsv(arr) {
  var h = 0, s = 0, v = 0;
  var r = arr[0], g = arr[1], b = arr[2];
  arr.sort(function (a, b) {
      return a - b;
  })
  var max = arr[2]
  var min = arr[0];
  v = max / 255;
  if (max === 0) {
      s = 0;
  } else {
      s = 1 - (min / max);
  }
  if (max === min) {
      h = 0;//事实上，max===min的时候，h无论为多少都无所谓
  } else if (max === r && g >= b) {
      h = 60 * ((g - b) / (max - min)) + 0;
  } else if (max === r && g < b) {
      h = 60 * ((g - b) / (max - min)) + 360
  } else if (max === g) {
      h = 60 * ((b - r) / (max - min)) + 120
  } else if (max === b) {
      h = 60 * ((r - g) / (max - min)) + 240
  }
  h = parseInt(h);
  s = parseInt(s * 100);
  v = parseInt(v * 100);
  return [h, s, v]
}
function hsvToRgb(arr) {
  var h = arr[0], s = arr[1], v = arr[2];
  s = s / 100;
  v = v / 100;
  var r = 0, g = 0, b = 0;
  var i = parseInt((h / 60) % 6);
  var f = h / 60 - i;
  var p = v * (1 - s);
  var q = v * (1 - f * s);
  var t = v * (1 - (1 - f) * s);
  switch (i) {
      case 0:
          r = v; g = t; b = p;
          break;
      case 1:
          r = q; g = v; b = p;
          break;
      case 2:
          r = p; g = v; b = t;
          break;
      case 3:
          r = p; g = q; b = v;
          break;
      case 4:
          r = t; g = p; b = v;
          break;
      case 5:
          r = v; g = p; b = q;
          break;
      default:
          break;
  }
  r = parseInt(r * 255.0)
  g = parseInt(g * 255.0)
  b = parseInt(b * 255.0)
  return [r, g, b];
}