使用UniApp实现小程序的微信登录功能的代码详解

// 封装全局登录函数
// backpage, backtype 2个参数分别代表：
// backpage : 登录后返回的页面
// backtype : 打开页面的类型[1 : redirectTo 2 : switchTab]
Vue.prototype.checkLogin = function( backpage, backtype ){
	// 同步获取本地数据（uid、随机码、用户名、头像）
	var user_id = uni.getStorageSync('user_id');
	var user_nu = uni.getStorageSync('user_nu');
	var user_nm = uni.getStorageSync('user_nm');
	var user_fa = uni.getStorageSync('user_fa');
	if( user_id == '' || user_nu == '' || user_fa == ''){
		// 使用重定向的方式跳转至登录页面
		uni.redirectTo({url:'../login/login?backpage='+backpage+'&backtype='+backtype});
		return false;
	}
	// 登录成功、已经登录返回数组 [用户 id, 用户随机码, 用户昵称, 用户表情]
	return [user_id, user_nu, user_nm, user_fa];
}
// 定义一个全局的请求地址
Vue.prototype.apiServer = 'http://0608.cc/'

public function loginApplets(Request $request, UserInfo $userInfo)
{
 // 获取数据
 $data['u_openid'] = $request->param('openid', '');
 // 验证数据
 $rule = [
  'u_openid' => 'require|max:200|min:10'
 ];
 $message = [
  'u_openid.require' => 'openid 不能为空',
  'u_openid.max'  => 'openid 格式错误',
  'u_openid.min'  => 'openid 格式错误'
 ];
 $validate = Validate::rule($rule)->message($message);
 if (!$validate->check($data)) {
  return json(['code' => 1, 'msg' => $validate->getError(), 'res' => null]);
 }
 // 根据 openid 判断是否存在
 $where['u_openid'] = $data['u_openid'];
 $user = $userInfo->selOne($where);
 if (!$user) {
  return json(['code' => 1, 'msg' => '还没授权登录、请先授权然后登录', 'res' => $user]);
 }
 return json(['code' => 0, 'msg' => '已授权获取到用户的数据', 'res' => $user]);
}

public function appletsUserInfo(Request $request, UserInfo $userInfo)
{
 // 获取数据
 $data['u_openid'] = $request->param('openid', '');
 $data['u_avatarUrl'] = $request->param('avatarUrl', '');
 $data['u_city'] = $request->param('city', '');
 $data['u_country'] = $request->param('country', '');
 $data['u_gender'] = $request->param('gender', '');
 $data['u_language'] = $request->param('language', '');
 $data['u_nickName'] = $request->param('nickName', '');
 // 验证数据
 $rule = [
  'u_openid' => 'require|max:200|min:10',
  'u_avatarUrl' => 'require',
  'u_nickName' => 'require'
 ];
 $message = [
  'u_openid.require'  => 'openid 不能为空',
  'u_openid.max'   => 'openid 格式错误',
  'u_openid.min'   => 'openid 格式错误',
  'u_avatarUrl.require' => '用户头像 不能为空',
  'u_nickName.max'  => '用户名 格式错误',
 ];
 $validate = Validate::rule($rule)->message($message);
 if (!$validate->check($data)) {
  return json(['code' => 1, 'msg' => $validate->getError(), 'res' => null]);
 }

 // 根据 openid 判断是否存在
 $where['u_openid'] = $data['u_openid'];
 $user = $userInfo->selOne($where);

 // 存在、执行修改
 if ($user) {
  $user_res = $userInfo->updOne($where, $data);
  $res = [];
  $res['u_id'] = $user['u_id'];
  $res['u_regtime'] = $user['u_regtime'];
 }

 // 不存在、执行添加
 if (empty($user)) {
  $res = [];
  $res = $data;
  $res['u_regtime'] = time();
  $res['u_id'] = $userInfo->addOne($res);
 }

 // 判断是否添加成功
 if (empty($res['u_id'])) {
  return json(['code' => 1, 'msg' => '注册失败,返回重试', 'res' => null]);
 }
 return json(['code' => 0, 'msg' => 'ok', 'res' => $res]);
}