long-press无法分享base64的图，至少ios上我没成功过。 page.onshow的时候用下面代码转成本地文件，将image.src替换为本地文件后，long-press就OK了 var imgSrc = this.data.imgSrc.slice(23);//base64编码 var save = wx.getFileSystemManager(); var number = Math.random(); let localFilePath = wx.env.USER_DATA_PATH + '/pic' + number + '.png', _this = this; save.writeFile({ filePath: localFilePath, data: imgSrc, encoding: 'base64', success: res => { _this.setData({ localFilePath: localFilePath }) } })