微信小程序调用扫一扫，将所得的信息展示到页面中
wxml文件：
<view bindtap='scancode'> <text class='texts'>(点击扫一扫) </text></view><view>{{result}}</view>
js文件：
Page({ data: { result: "", }, scancode: function () { let that = this; let result; wx.scanCode({ success: (res) => { this.result = res.result; that.setData({ result: this.result }) } }) },})
