二进制

Question

我遇到了一些非常奇怪的事情，我无法理解为什么会这样。我做这个枚举：

 [Flags]
public enum EnumMoveCommand
{
    None = 0x0,
    Up = 0x1,
    Right = 0x2,
    Bottom = 0x4,
    Left = 0x8,
    LeftClick = 0x16,
    RightClick = 0x32,
    Vertical = Up | Bottom,
    Horizontal = Left | Right,
    Move = Up | Right | Left | Bottom
}

所以我可以这样使用它：

 if ((commands & EnumMoveCommand.Left) != EnumMoveCommand.None)
        {
            MoveToDo.X -= this.speed.X * (float)gameTime.ElapsedGameTime.TotalSeconds;
        }
        if ((commands & EnumMoveCommand.Right) != EnumMoveCommand.None)
        {
            MoveToDo.X += this.speed.X * (float)gameTime.ElapsedGameTime.TotalSeconds;
        }
        if ((commands & EnumMoveCommand.Up) != EnumMoveCommand.None)
        {
            MoveToDo.Y -= this.speed.Y * (float)gameTime.ElapsedGameTime.TotalSeconds;
        }
        if ((commands & EnumMoveCommand.Bottom) != EnumMoveCommand.None)
        {
            MoveToDo.Y += this.speed.Y * (float)gameTime.ElapsedGameTime.TotalSeconds;
        }
        if ((commands & EnumMoveCommand.Horizontal) != EnumMoveCommand.None && (commands & EnumMoveCommand.Vertical) != EnumMoveCommand.None)
        {
            MoveToDo.X = (float)(Math.Cos(45) * MoveToDo.X);
            MoveToDo.Y = (float)(Math.Sin(45) * MoveToDo.Y);
        }

但是值为0x32的RightClick不起作用，例如：

((EnumMoveCommand.RightClick & EnumMoveCommand.Right) != EnumMoveCommand.None)=true

0x32＆amp; 0x2！= 0x0？

由于

修改

Okei所以它是十六进制而不是十进制，现在这是我的代码谁工作：

 None = 0x0,
    Up = 0x1,
    Right = 0x2,
    Bottom = 0x4,
    Left = 0x8,
    LeftClick = 0x10,
    RightClick = 0x20,
    Vertical = Up | Bottom,
    Horizontal = Left | Right,
    Move = Up | Right | Left | Bottom

全部谢谢

编辑2

    [Flags]
public enum EnumMoveCommand
{
    None = 0,
    Up = 1<<0, //1
    Right = 1<<1, //2
    Bottom = 1<<2, //4
    Left = 1<<3, //8
    LeftClick = 1<<4, //16
    RightClick = 1<<5, //32
    Vertical = Up | Bottom,
    Horizontal = Left | Right,
    Move = Up | Right | Left | Bottom
}

更好，谢谢kalten

Answer 1

EnumMoveCommand.RightClick = 0x32 = 110010

EnumMoveCommand.Right = 0x2 = 000010

110010＆amp; 000010 = 000010

所以     （（EnumMoveCommand.RightClick＆amp; EnumMoveCommand.Right）！= EnumMoveCommand.None）== true

如果您希望避免枚举值之间发生冲突，可以使用<<运算符。

[Flags]
public enum EnumMoveCommand
{
    None = 0,
    Up = 1<<0, //1
    Right = 1<<1, //2
    Bottom = 1<<2, //4
    Left = 1<<3, //8
    LeftClick = 1<<4, //16
    RightClick = 1<<5, //32
    Vertical = Up | Bottom,
    Horizontal = Left | Right,
    Move = Up | Right | Left | Bottom
}

顺便说一下，您可以使用HasFlag函数，如：

commands.HasFlag(EnumMoveCommand.RightClick)