爲什麼我的物體不移動？

Question

我有一個程序，我想用鍵盤按鍵移動圖形。我原本有一個功能來移動圖形，只要按下按鈕，但我放棄了這種方法來解決鍵盤重複延遲問題。相反，我決定使用計時器，在KeyPess事件中啓用該計時器，並在KeyUp事件中禁用該計時器。起初，我爲每個不同的方向使用了4個不同的定時器，雖然它起作用，但我注意到我的程序經常開始凍結。我決定爲所有動作使用一個計時器，並使用if語句來確定方向。現在，看起來我的圖形根本不動，儘管我所做的只是複製和粘貼代碼。

enum Direction 
{ 
    Left, Right, Up, Down 
} 
private Direction _objectDirection; 
int _x = 100, _y = 100; 
private void Form1_Paint(object sender, PaintEventArgs e) 
{ 
Picture.MakeTransparent(Color.Transparent); 
e.Graphics.DrawImage(Picture, _x, _y); 
} 
void Form1_KeyDown(object sender, KeyEventArgs e) 
{ 
    if (e.KeyCode == Keys.W) 
    { 
     if (timerAnimation.Enabled == false) 
     { 
      AnimationMaxFrame = 3; 
      timerAnimation.Enabled = true; 
     } 
     _objectDirection = Direction.Up; 
     timerMovement.Enabled = true; 
    } 
    //The rest of this code is omitted to save space, it is repeated 4 times with the only 
    //changes being the key pressed, and the object direction. 
    Invalidate(); 
} 
void Form1_KeyUp(object sender, KeyEventArgs e) 
{ 
    timerAnimation.Enabled = false; 
    timerMovement.Enabled = false; 
    Picture = Idle; 
    this.Refresh(); 
} 
private void timerMovement_Tick(object sender, EventArgs e) 
{ 
    if (_objectDirection == Direction.Up) 
    { 
     if (_y > 24) 
     { _y = _y - 2; } 
     else 
     { timerMovement.Enabled = false; } 
     //This if statement is to ensure that the object doesn't leave the form. 
     //I have tried removing them already, they're not the problem. 
    } 
    //Again, this is shortened to save space, it is repeated for each direction. 
    Invalidate(); 
} 

什麼是阻止我的圖形移動，有沒有更好的方法來做到這一點？我還想添加很多功能，但它已經凍結了。

Answer 1

不知道你正在使用的WinForms一個遊戲，但給點...

您需要處理按鍵按下事件，當按下按鍵事件觸發設置爲根據，如果在你的代碼中的布爾標誌活動是新聞或發佈。然後在您的更新代碼中檢查標誌並相應地進行移動。

這將是這樣的（示例代碼）：

bool moveup = false; 
void KeyPressed(object sender, KeyEventArgs e) 
{ 
    // check for keys that trigger starting of movement 
    if (e.KeyCode == Keys.W) moveup = true; 
} 
void KeyReleased(object sender, EventEventArgs e) 
{ 
    // check for keys that trigger stopping of movement 
    if (e.KeyCode == Keys.W) moveup = false; 
} 
void TimerTick(obect sender, EventArgs e) 
{ 
    if (moveup) 
    { 
     // move your object 
    } 
}