cos.postObject({ Bucket: --, Region: --, Key: fileKey, FilePath: filePath, onProgress: function (info) { let oldP = _this.data.percent1; let percent = Math.floor(info.percent*100); let loaded = info.loaded; console.log(oldP + ":" + percent + "->" + info.loaded + ": " + info.total) if(oldP != percent){ _this.setData({ percent1: info.percent * 100 }) } } }, function (err, data) { //... }