在Swift中将整数转换为NSData(Converting an Integer to NSData in Swift)

 总而言之，您在发布的代码中实际尝试做的是检查从$request传入的ban_status值，或者换句话说是登录表单。 
 
 我对你的问题的理解是，这不是你想要的。 
 
 相反，试试这个： 
 
 通过在LoginController定义AuthenticatesUsers的login方法来覆盖它，并添加以下一小部分来检查你的ban_status ： 
 
public function login(Request $request)
{
    $this->validateLogin($request);

    // If the class is using the ThrottlesLogins trait, we can automatically throttle
    // the login attempts for this application. We'll key this by the username and
    // the IP address of the client making these requests into this application.
    if ($lockedOut = $this->hasTooManyLoginAttempts($request)) {
        $this->fireLockoutEvent($request);

        return $this->sendLockoutResponse($request);
    }

    $credentials = $this->credentials($request);

    if ($this->guard()->attempt($credentials, $request->has('remember'))) {
        if ($this->guard()->user()->ban_status === 0) { // ADDED THIS CHECK
            return $this->sendLoginResponse($request);
        }
    }

    // If the login attempt was unsuccessful we will increment the number of attempts
    // to login and redirect the user back to the login form. Of course, when this
    // user surpasses their maximum number of attempts they will get locked out.
    if (! $lockedOut) {
        $this->incrementLoginAttempts($request);
    }

    return $this->sendFailedLoginResponse($request);
}

To make a long story short, what you are actually trying to do in the code you posted is to check the ban_status value being passed in from the $request, or in other words the login form.
 
My understanding of your questions is that this is not really what you want.
 
Instead, try this:
 
Override the login method of AuthenticatesUsers by defining it in LoginController, with the following small addition to check for your ban_status:
 
public function login(Request $request)
{
    $this->validateLogin($request);

    // If the class is using the ThrottlesLogins trait, we can automatically throttle
    // the login attempts for this application. We'll key this by the username and
    // the IP address of the client making these requests into this application.
    if ($lockedOut = $this->hasTooManyLoginAttempts($request)) {
        $this->fireLockoutEvent($request);

        return $this->sendLockoutResponse($request);
    }

    $credentials = $this->credentials($request);

    if ($this->guard()->attempt($credentials, $request->has('remember'))) {
        if ($this->guard()->user()->ban_status === 0) { // ADDED THIS CHECK
            return $this->sendLoginResponse($request);
        }
    }

    // If the login attempt was unsuccessful we will increment the number of attempts
    // to login and redirect the user back to the login form. Of course, when this
    // user surpasses their maximum number of attempts they will get locked out.
    if (! $lockedOut) {
        $this->incrementLoginAttempts($request);
    }

    return $this->sendFailedLoginResponse($request);
}