uniapp关于app与h5图片压缩

getPhoto() {
                let that = this;
                uni.chooseImage({
                    count: 1, 
                    sizeType: ['compressed'], 
                    sourceType: ['album', 'camera'], 
                    success: function(res) {
                        // #ifdef APP-PLUS
                        that.compressImg(res)
                        // #endif
                        // #ifdef H5
                        that.getImageInfo(res.tempFilePaths[0])
                        // #endif
                    },
                    complete: function(res) {
                        uni.hideLoading()
                    }
                });
            },
            

            getImageInfo(src) {
                let _this = this
                uni.getImageInfo({
                    src,
                    success(res) {
                        let canvasWidth = res.width //图片原始长宽
                        let canvasHeight = res.height
                        let ratio = canvasWidth / canvasHeight;
                        if (canvasWidth > 500) {
                            canvasWidth = 500;
                            canvasHeight = Math.floor(canvasWidth / ratio);
                        }
            
                        let img = new Image()
                        img.src = res.path
                        let canvas = document.createElement('canvas');
                        let ctx = canvas.getContext('2d')
                        canvas.width = canvasWidth
                        canvas.height = canvasHeight
                        ctx.drawImage(img, 0, 0, canvasWidth, canvasHeight)
                        canvas.toBlob(function(fileSrc) {
                            let imgSrc = window.URL.createObjectURL(fileSrc)
                            _this.upimg(imgSrc)
                        })
                    }
                })
            },
            compressImg(res){
                uni.compressImage({
                    src: res.tempFilePaths[0],
                    quality: 80,
                    success: info => {
                        this.upimg(info.tempFilePath)
                    }
                })
            },
            upimg(info){
                uni.showLoading({
                    title: '上传中...'
                })
                var that = this
                uni.uploadFile({
                    url: '', //接口地址
                    filePath: info,
                    name: 'file',
                    success: (uploadFileRes) => {
                        uni.hideLoading()
                        console.log(uploadFileRes);
                    },
                    fail: function(res) {
                        uni.hideLoading()
                        uni.showModal({
                            title: '提示',
                            content: '上传失败，请重新上传',
                            showCancel: false,
                        })
                    }
                });
            },