uniapp实现文件预览过程

H5实现预览

小程序和app预览

                uni.downloadFile({
					    url: url,
					    success: function (res) {
						var filePath = res.tempFilePath;
						uni.openDocument({
							filePath: filePath,
							showMenu: true,
							success: function (res) {
								console.log('打开文档成功');
							}
						});
					}
				});