fastNetwork/pages/exchange/exchange.js

//index.js
//获取应用实例
const app = getApp()

Page({
  data: {
    form: {
      type: '支付宝',
      name: '顾红伟',
      phone: '17319450324',
      isNum: '100.00',
    },
    number: ''
  },
  //事件处理函数
  formSubmit: function (e) {
    let data = this.data.form;
    data.number = e.detail.value.number;
    // 判断提现金额是否大于已拥有的金额
    if (data.number <= data.isNum) {
      console.log(data);
    } else {
      wx.showToast({
        title: '输入错误，请重新输入',
        icon: 'none',
        duration: 2000
      })
    }
  },
  onLoad: function () {
  },
})