//index.js
//获取应用实例var app = getApp()Page({ data: { show: "", }, onLoad: function () { console.log('onLoad') }, click: function () { var that = this; var show; wx.scanCode({ success: (res) => { this.show = "--result:" + res.result + "--scanType:" + res.scanType + "--charSet:" + res.charSet + "--path:" + res.path; that.setData({ show: this.show }) wx.showToast({ title: '成功', icon: 'success', duration: 2000 }) }, fail: (res) => { wx.showToast({ title: '失败', icon: 'success', duration: 2000 }) }, complete: (res) => { }//获取应用实例var app = getApp()Page({ 
