getQRCode() {var that = this;wx.request({url: 'http://localhost:8080/getQRCode?ID=' + '13',header: {'content-type': 'application/json'},method: 'POST',responseType: 'arraybuffer',//将原本按文本解析修改为arraybuffersuccess(res) {that.setData({getQRCode: wx.arrayBufferToBase64(res.data)})console.log(that.data.getQRCode1)}})},

<button  class="btn1" type="primary" bindtap="getQRCode">生成携带参数的二维码</button><!--绿色样式-->
<view>二维码：<image src="data:image/png;base64,{{getQRCode}}"  style="width: 50vw; height: 20vh;"></image></view>

  /*** 页面的初始数据*/data: {getQRCode: "",},