uniapp 调用原生 压缩图片

choseImg() {
    let that = this;
    that.isCrossImg = true;
    uni.chooseImage({
        count: that.count,
        sizeType: ['compressed', 'original'],
        sourceType: that.sourceType,
        success: function(chooseImageRes) {
            console.log("chooseImageRes", chooseImageRes);
            let tempFilePaths = chooseImageRes.tempFilePaths; //上传的图片路径
            //判断图片上传是否必须要横图，若需要则验证
            if (that.baseData.remote) {
                tempFilePaths.forEach((item, index) => {
                uni.getImageInfo({
                    src: item,
                    success: (res) => {

                        let canvasWidth = res.width; //图片原始长宽
                        let canvasHeight = res.height;
                        if (canvasWidth <= canvasHeight) {
                            uni.showToast({
                                title: '请使用手机横拍上传图片',
                                duration: 1000,
                                icon: 'none'
                            });
                            that.isCrossImg = false;
                            return;
                        }

                    },
                    complete: () => {
                        if (index == tempFilePaths.length - 1 && that.isCrossImg) {
                             that.appCompressImg(0, tempFilePaths);
                        }
                    }
                })
                })
            } else {
                that.appCompressImg(0, tempFilePaths);
            }

        }
    })
 },

 //app压缩图片，由于这个操作是异步，所以需要递归，num记录递归的次数是否等于数组长度用于程序的返回
 appCompressImg(num, tempFilePaths) {
     let that = this;
     let index = tempFilePaths[num].lastIndexOf("."); //获取图片地址最后一个点的位置
     let img_type = tempFilePaths[num].substring(index + 1, tempFilePaths[num].length); //截取图片类型如png jpg
     let img_yuanshi = tempFilePaths[num].substring(0, index); //截取图片原始路径
     let d2 = new Date().getTime(); //时间戳
     //压缩图片
     plus.zip.compressImage({
         src: tempFilePaths[num], //你要压缩的图片地址
         dst: img_yuanshi + d2 + '.' + img_type, //压缩之后的图片地址(注意压缩之后的路径最好和原生路径的位置一样，不然真机上报code-5)
          '800px',
         height: 'auto'
     },
     function(e) {
         //压缩之后路径转base64位的
         //通过URL参数获取目录对象或文件对象
         plus.io.resolveLocalFileSystemURL(e.target, function(entry) {
         // 可通过entry对象操作test.html文件
         entry.file(function(file) { //获取文件数据对象
              var fileReader = new plus.io.FileReader(); // 文件系统中的读取文件对象，用于获取文件的内容

              fileReader.readAsDataURL(file); //以URL编码格式读取文件数据内容
              fileReader.onloadend = function(evt) { //读取文件成功完成的回调函数

              let base64 = evt.target.result; //拿到base64
              that.$api.mainApi.uploadImageBase64({
                   base64Data: base64
              }).then(res => {
                   if (res.data.code == 0) {
                       let url = that.$imgBaseUrl + res.data.data;
                       if (that.count == 1) {
                           that.$set(that.imgUrls, '0', url);
                       } else {
                           that.imgUrls.push(url);
                       }

                       if (num == tempFilePaths.length - 1) {
                           let data = {
                           　　comName: that.comName,
                              value: {
                              　　imgSubType: that.baseData.subType,
                              　　value: that.imgUrls
                           　　}
                        　　}
                        　　that.$emit("sendData", data);
                        　　return
                       } else {
                           //利用递归循环来实现多张图片压缩
                           that.appCompressImg(num + 1, tempFilePaths)
                       }
                   } else {
                       uni.showToast({
                           title: '图片上传失败',
                           duration: 2000
                       });
                   }
               })

            }
        })
    })


},
function(error) {
　　console.log("Compress error!");
   console.log(JSON.stringify(error));
}
);
},