wx.compressImage重复压缩图片至指定大小，压一次后就没办法继续压

compressImage(src, limit) {
        return new Promise((resolve, reject) => {
            wx.compressImage({
                src: src,
                quality:70,
                success: (res) => {
                    console.log('compress', res)
                    wx.getFileSystemManager().getFileInfo({
                        filePath: res.tempFilePath,
                        success: (img) => {
                            if(img.size<limit*1024){
                                console.log('img1',img)
                                return resolve({done:true, value:res})
                            }else{
                                console.log('img2',img)
                                return resolve({done:false, value:res})
                            }
                        },
                        fail: (img) => {
                            console.log('img', img)
                            reject(img)
                        }
                    })


                },
                fail: (res) => {
                    console.log('error')
                    reject(res)
                }
            })
        }).then((res) => {
            if (res.done) {
                console.log('img1', res)
                return  Promise.resolve(res)
            } else {
                console.log('img2', res)
                    return this.compressImage(res.value.tempFilePath, limit)
                
            }
        }).catch((err) => {
            return Promise.reject(err)
        })


    },