flask

1.项目后端步骤

具体步骤可参考flask官网：flask 中文网

（1）创建虚拟环境

（2）激活虚拟环境

（3）在虚拟环境里边安装Flask

（4）粘贴官网的最小flask代码

（5）启动flask服务

2.代码书写

from flask import Flask

app = Flask(__name__)


@app.route("/")
def welcome():
    return '<p>welcome to lyy’s home</p>'

@app.route("/login/<username>/<password>")
def login(username,password):
    right_result = {'code':200, 'result': f'welcome{username}'}
    wrong_result = {'code':500, 'result': "sorry! it's wrong"}
    if username == 'lyy' and password == 'xxxx':
        return right_result
    elif username == 'ztf' and password == 'xxxx':
        return right_result
    else:
        return wrong_result

3.运行flask测试

微信小程序

在index.wxml中添加用户登录的标签

<!--index.wxml-->
<view class="container">
  用户名：<input bindinput="usernameInput" type="text" value=""/>
  密码：<input bindinput="passwordInput" id="password" type="password" value=""/>
  <button type="primary" bindtap="login">登录</button>
</view>

在index.js书写函数配置，登录成功则跳转页面，登陆失败显示登陆失败字样

// index.js
Page({
  data() {
    return {
      username: "",
      password: ""
    }
  },
  usernameInput:function (e) {
    console.log(e.detail.value)
    let a = e.detail.value
    this.username = a;
  },
  passwordInput: function (e) {
    this.password = e.detail.value;
  },
  login() {
    wx.request({
      url: 'http://127.0.0.1:5000/login/' + this.username + "/" + this.password,
      success: function(res) {
        console.log(res)
        let code = res.data.code;
        if (code != 200) {
          wx.showToast({
            title: '登陆失败',
          })
          return;
        }
        console.log("success")
        wx.switchTab({
          url: '/pages/hello/hello',
        })
      }
    })
  }
})