html

<veiw class="img-view">
    <image class="img" src="/images/vip/banner.png" />
</veiw>
<form bindsubmit="formSubmit">
    <view class="main">
        <view class="person_info">
            <text class="person_info_text">面值</text>
            <text class="word">{{amount}}元</text>
        </view>
        <view class="person_info">
            <text class="person_info_text">姓名</text>
            <input name="name" class="person_info_input" placeholder-class="person_info_input" placeholder="请输入您的姓名" />
        </view>
        <view class="person_info">
            <text class="person_info_text">性别</text>
            <view class="sex-box">
                <radio-group name="sex" bindchange="changeSex">
                    <radio class="radio-item" value="1" checked="checked" color="#DBB975">男</radio>
                    <radio class="radio-item" value="2" checked="" color="#DBB975">女</radio>
                </radio-group>
            </view>
        </view>
        <view class="person_info">
            <text class="person_info_text">手机号码</text>
            <input name="telephone" type="number" bindinput='watchTelephone' class="person_info_input" placeholder-class="person_info_input" placeholder="请填写手机号" />
        </view>
        <view class="person_info">
            <text class="person_info_text">验证码</text>
            <input name="code" type="number" class="person_info_input" placeholder-class="person_info_input" placeholder="请输入验证码" />
            <view class="person_info_down" bind:tap="getCode">{{code}}</view>
        </view>
        <view class="person_info">
            <text class="person_info_text">生日</text>
            <picker class="date-picker" mode="date" value="" start="1949-10-01" bindchange="bindDateChange">
                <view class="birthday">
                    <input name="birthday" type="text" value="{{birthday}}" class="info_input" placeholder-class="info_input" placeholder="请选择您的生日" />
                    <view class="info_more">
                        <image class="more" src="/images/common/more_gray.png" />
                    </view>
                </view>
            </picker>
        </view>
        <button class="save_btn" form-type="submit">立即支付</button>
    </view>
</form>

js

import Storage from "../../../common/auth/Storage";
import { initNoPage } from "../../../common/requestData";
import tips from "../../../common/tips";
import request from "../../../common/request";
import { checkTel } from "../../../common/commonFunc";
const app = getApp();


Page({
  formSubmit({ detail: { value } }) {
    let that = this;

    if (that.data.lock_flag) {
      return;
    }

    console.log('form发生了submit事件，携带数据为：', value);
    for (const item of Object.values(value)) {
      if (!item) {
        return tips.showMsg("请填写信息");
      }
    }

    // 具体的判断
    if (!checkTel(value.telephone)) {
      return tips.showMsg("请填写正确的手机号");
    }

    const openid = app.globalData.openid || Storage.get().openid;
    const config_id = this.data.config_id;
    
    that.setData({
      lock_flag:true
    });
    request("getPayData", {openid,config_id, ...value})
      .then(( {data} ) => {
        that.setData({
          lock_flag:false
        });

        // 发起支付
        wx.requestPayment({
          timeStamp: data.timeStamp.toString(),
          nonceStr: data.nonceStr,
          package: data.package,
          signType: data.signType,
          paySign: data.sign,
          complete() {
            return wx.reLaunch({
              url: "/pages/vip/index"
            });
          }
        });
        console.log('支付数据',data);
      })
      .catch(({ errdesc }) => {
        that.setData({
          lock_flag:false
        });
        return tips.showMsg(errdesc);
      });
  },
  bindDateChange(e) {
    console.log('picker发生change事件，携带value值为：', e.detail.value);
    let birthday = e.detail.value;
    this.setData({
      birthday: birthday
    })
  },
  changeSex(e) {
    console.log('radio发生change事件，携带value值为：', e.detail.value)
  },
  // 监听手机号
  watchTelephone({ detail: { value } }) {
    console.log('手机号输入的内容为', value);
    var that = this;
    that.setData({
      telephone: value
    })
  },
  /**
   * 页面的初始数据
   */
  data: {
    lock_flag:false,
    disabled: false,
    code: '获取验证码',
    birthday: '',
    amount: '',
    telephone: '',
    config_id: '',
  },
  getCode() {
    var that = this;
    // 判断是否填写手机号
    let telephone = that.data.telephone;
    if (!telephone) {
      return tips.showMsg("请填写手机号");
    }

    // 具体的判断
    if (!checkTel(telephone)) {
      return tips.showMsg("请填写正确的手机号");
    }

    if (that.data.disabled == true) {
      return;
    }


    var time = 60;
    that.setData({
      code: '60秒后重发',
      disabled: true
    });
    var Interval = setInterval(function () {
      time--;
      if (time > 0) {
        that.setData({
          code: time + '秒后重发'
        })
      } else {
        clearInterval(Interval);
        that.setData({
          code: '获取验证码',
          disabled: false
        })
      }
    }, 1000);

    // 发送验证码
    request("getPhoneCode", { telephone }).then(({ errno, data }) => {
      if (errno == 0) {
        console.log('发送验证码成功！', data);
      }
    }).catch(({ errdesc }) => {
      console.log('发送验证码失败！', errdesc);
      return tips.showMsg(errdesc);
    });
  },

  /**
   * 生命周期函数--监听页面加载
   */
  onl oad: function (options) {
    let id = options.id;
    // console.log(options);
    let that = this;
    that.setData({
      config_id: id,
    })
    request("getCardConfigInfo", { config_id: id }).then(({ data }) => {
      that.setData({
        amount: data.amount,
      });
    });
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {

  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 页面相关事件处理函数--监听用户下拉动作
   */
  onPullDownRefresh: function () {

  },

  /**
   * 页面上拉触底事件的处理函数
   */
  onReachBottom: function () {

  },

  /**
   * 用户点击右上角分享
   */
  onShareAppMessage: function () {

  }
})

获取参数，获取验证码，获取手机号等信息。
支付成功之后，跳转。redirectTo或者reLaunch。

其实不复杂。

wx.requestPayment({
  timeStamp: data.timeStamp.toString(),
  nonceStr: data.nonceStr,
  package: data.package,
  signType: data.signType,
  paySign: data.sign,
  complete() {
    return wx.redirectTo({
      url: "/pages/order/list/index"
    });
  }
});