/**
* 登录
*/
public function login()
{
try {
if (IS_POST) {
$user = new UserModel();
$user->login(I('username'), I('password'));
$callback = session('callback');
$this->success('登录成功', empty($callback) ? U('/') : $callback);
} else {
$this->display();
}
} catch (Exception $e) {
$this->error($e->getMessage());
}
}
