<u-form-item prop="rememberPsw">
          <u-checkbox-group>
            <u-checkbox v-model="loginForm.rememberPsw" shape="circle" @change="loginForm.rememberPsw=!loginForm.rememberPsw" label="记住账号密码"></u-checkbox>
          </u-checkbox-group>
        </u-form-item>

  data() {
      return {
                  loginForm: {
          rememberPsw: true,
        }
            }
         },
      mounted() {
      //页面加载完成，获取本地存储的账号及密码  
      const Phone = uni.getStorageSync('Phone');//我这边是通过手机号进行登录
      const userPwd = uni.getStorageSync('userPwd');
      if (Phone && userPwd) {
        this.loginForm.Phone = Phone;
        this.loginForm.userPwd = userPwd;       
      } else {
        this.loginForm.Phone = "";
        this.loginForm.userPwd = "";        
      }
    },
        methods: {
            //写在OBJECT参数名是success的登录请求里面
            if (!this.loginForm.rememberPsw) { //用户勾选“记住密码”
      console.log("记住密码")
      uni.setStorageSync('Phone', this.loginForm.Phone);
      uni.setStorageSync('userPwd', this.loginForm.userPwd);
      } else { //用户没有勾选“记住密码”
        console.log("没有记住密码")
        uni.removeStorageSync('Phone');
        uni.removeStorageSync('userPwd');
        his.loginForm.Phone = "";
        this.loginForm.userPwd = "";
          } 
       }