How to get the QR code (code) in the mini program

The content of this article is about how to obtain the QR code (code) in the mini program. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

wx.request({
// 获取token
url: 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential',
data: {
appid: '',//自己小程序后台的appid
secret:''//自己小程序的secret
},
success(res) {
console.log(res);
//获取二维码的接口
wx.request({
// 调用接口C
url: 'https://api.weixin.qq.com/wxa/getwxacode?access_token=' + res.data.access_token,
method: 'POST',
responseType:"arraybuffer",//必须设置返回的数据的格式，要不返回的乱码
data: {"path": "pages/mys/my","width": 430},
success(res) {
console.log(res)var type = res.header["Content-Type"];
var prefix = "data:" + type + ";base64,";
var imgUrl = prefix+ wx.arrayBufferToBase64(res.data)
console.log(self.imgUrl)self.setData({
imgUrl: imgUrl,
})
// res是二进制流，后台获取后，直接保存为图片，然后将图片返回给前台
// 后台二进制怎么转图片？我也不会后台，学会了再贴代码}
})
}
})

//When drawing network images on canvas, the images must be downloaded locally.

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