成功设置标题 参考代码： openConfirmation(){ const { orderDetail } = this.data; wx.downloadFile({ url: `${此处是文件的链接}`, filePath: wx.env.USER_DATA_PATH + "/" + `${orderDetail.name}确认书.pdf`, success: res => { const filePath = res.filePath; wx.openDocument({ filePath: filePath, showMenu: true, fileType: 'pdf', success: function (res) { console.log('打开文档成功') } }) } }) }