Xna c# class error

Question

我正在为我的游戏制作渐变动画，我得到了一个名为LoadContent的类，然后我写道：

public override void LoadContent (ContentManager Content, Texture2D image, string text, Vector2 position)
{
        base.LoadContent(Content, image, text, position);
        increase = false;
        fadeSpeed = 1.0f;
        defaultTime = new TimeSpan(0, 0, 1);
        timer = defaultTime;
        activateValue = 0.0f;
        stopUpdating = false;
        defaultAlpha = alpha;
}

但我遇到了一个错误，我试图删除覆盖，但它没有帮助，并试图将公共更改为私有，只是想看看它是否有效，但它不起作用。这就是错误：

'Xnaplatformer.FadAnimation.LoadContent（Microsoft.Xna.Framework.Content.ContentManager，Microsoft.Xna.Framework.Graphics.Texture2D，字符串，Microsoft.Xna.Framework.Vector2）"：无法重写继承的成员'Xnaplatformer.Animation.LoadContent（Microsoft.Xna.Framework.Content.ContentManager，Microsoft.Xna.Framework.Graphics.Texture2D，字符串，Microsoft.Xna.Framework.VVector2）'，因为它未标记为虚拟，抽象，或覆盖C:\Users\Mike\documents\visual studio2013\Projects\Xnaplatformer\Xnaplatormer\Xnaplatformer\FadeAnimation.cs Xnaplatform

Answer 1

首先，代码snippt中的LoadContent不是一个类。这是一种方法。当你询问LoadContent方法时，你会认为你试图在自定义游戏类中覆盖Game.LoadContent。将其标记为受保护的覆盖，游戏中的couse LoadContent也受到保护。

我希望这个例子能帮助你理解它是如何工作的：

class A
{
    public virtual void DoSome1() // can be overriden couse marked as virtual
    {
        // logic for class A
    }
    public void DoSome2(); // should be overriden couse it abstract method that have no body by default; any abstartc method makes class abstract too
    public void DoSome3() // can not be overriden: 1. not abstract; 2. not virtual
    {
        // logic for class A
    }
    protected virtual void DoSome4() // protected stil can be overriden; this method visible only inside class A and B
    {
        // logic for class A
    }
    private virtual void DoSome5() // virtual modifier is invalid couse private stil can not be overriden; visible only inside class A
    {
        // logic for class A
    }
}
class B : A
{
    public override void DoSome1() // use override keyword to re-define method from base class
    {
        // logic for class B
    }
    public override void DoSome2() // as A.DoSome2() is abstract you should override it B, or B also became abstratct
    {
        // logic for class B
    }
    new public void DoSome3() // this method not override A.DoSome3(), this is totally new method
    {
        // logic for class B
    }
    protected void DoSome4() // override A.DoSome4(); note: it also marked as protected
    {
        // logic for class B
    }
}