问题描述
当我尝试编译以下内容时:
public static delegate void MoveDelegate(Actor sender,MoveDirection args);
我收到,作为一个错误:modifer'static'对此项无效。 。
我在一个单例中实现这个,有一个单独的类调用委托。问题是,当我使用其他类中的单例实例调用委托(从标识符,而不是类型),我不能这样做,无论什么原因,即使我声明委托非静态。显然,我只能通过类型直接引用它,如果且仅当委托是静态的。
这是什么推理?我使用MonoDevelop 2.4.2。
更新
建议使用以下代码:
public void Move(MoveDirection moveDir)
{
ProcessMove );
}
public void ProcessMove(MoveDirection moveDir)
{
Teleporter.MoveMethod mm = new Teleporter.MoveMethod(Move);
moveDelegate(this,moveDir);
}
我收到一个处理错误,声明MoveMethod必须是
$ p>
public delegate void MoveDelegate(object o);
public static MoveDelegate MoveMethod;
所以方法变量可以定义为static。关键字 static
对于委托
定义没有意义,就像 enum
或 const
定义。
如何分配静态方法字段的示例:
public class A
{
public delegate void MoveDelegate(object o);
public static MoveDelegate MoveMethod;
}
public class B
{
public static void MoveIt(object o)
{
//做某事
}
}
public class C
{
public void Assign()
{
A.MoveMethod = B.MoveIt;
}
public void DoSomething()
{
if(A.MoveMethod!= null)
A.MoveMethod(new object());
}
}
When I try to compile the following:
public static delegate void MoveDelegate (Actor sender, MoveDirection args);
I receive, as an error: "The modifer 'static' is not valid for the this item."
I'm implementing this within a singleton, with a separate class which calls the delegate. The problem is that when I use the singleton instance within the other class to call the delegate (from the identifier, not the type), I can't do that for whatever reason, even when I declare the delegate non-static. Obviously, I can only refer to it via the type directly if and only if the delegate is static.
What is the reasoning behind this? I am using MonoDevelop 2.4.2.
update
After trying one of the suggestions with the following code:
public void Move(MoveDirection moveDir)
{
ProcessMove(moveDir);
}
public void ProcessMove(MoveDirection moveDir)
{
Teleporter.MoveMethod mm = new Teleporter.MoveMethod(Move);
moveDelegate(this, moveDir);
}
I've received a processing error, which states that the MoveMethod must be a type, and not an identifier.
Try this:
public delegate void MoveDelegate(object o);
public static MoveDelegate MoveMethod;
So the method-variable can be defined static. The keyword static
has no meaning for the delegate
definition , just like enum
or const
definitions.
An example of how to assign the static method-field:
public class A
{
public delegate void MoveDelegate(object o);
public static MoveDelegate MoveMethod;
}
public class B
{
public static void MoveIt(object o)
{
// Do something
}
}
public class C
{
public void Assign()
{
A.MoveMethod = B.MoveIt;
}
public void DoSomething()
{
if (A.MoveMethod!=null)
A.MoveMethod(new object());
}
}
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