uni-app微信小程序支付

//main.js文件
import md5 from './static/md5.js'
Vue.prototype.$md5 = md5
//prepay_id是下单之后后台传过来的id
function wxPay(prepay_id, fun = function() {}, fun1 = function() {}) {
var chars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' ];
//生成随机字符串
var a = "";
for (var i = 0; i < 30; i++) {
var id = Math.ceil(Math.random() * 35);
a += chars[id];
}
//生成签名
var paySign = this.$md5('appId=wx****94&nonceStr=' + a + '&package=prepay_id=' + prepay_id + '&signType=MD5&timeStamp=' + String(parseInt(new Date().getTime() / 1000)) + '&key=Sh*********cl')
uni.requestPayment({
provider: 'wxpay',
timeStamp: String(parseInt(new Date().getTime() / 1000)),
nonceStr: a,
package: 'prepay_id=' + prepay_id,
signType: 'MD5',
paySign: paySign,
success: () => {
fun()
},
fail: () => {
fun1()
}
})
}
Vue.prototype.$wxPay = wxPay

//其他页面调用
uni.request({
url: this.$url + '/api/Order/addOrder',
method: 'POST',
data: {
order_type: 1,
orders: JSON.stringify(arr)
},
success: (res) => {
console.log(res);
this.$wxPay(res.data.data.prepay_id, this.huidiao,this.huidiao)
}
})
huidiao() {
uni.navigateBack({
delta: 1
})
}