C＃自定義事件

Question

我有兩個PictureBox。一個是移動的PictureBox，我用WASD鍵移動，另一個是隨機生成的位置（敵人）。當我按空格鍵移動PicBox時，會拋出一個球，然後當球與敵人相撞時，我想要這個球，敵人的PictureBox將被移除。我想創建一個這樣做的事件，但我不知道如何。你可以幫我嗎？這是我的全部代碼：

namespace Gioco 
{ 
    public partial class Form1 : Form 
    { 
     Image img; 
     Image tmpSx; 
     Image tmpDx; 
     Image tmpUp; 
     Image tmpDw; 
     List<PictureBox> fireBox = new List<PictureBox>(); 

     int count = 0; //COUNT GLOBALE 

     Timer tm = new Timer(); 
     bool go = true;          
     EventHandler test; 

     EventHandler enemy; 
     Timer tmEnem = new Timer(); 

     public Form1() 
     { 
      InitializeComponent(); 
      panel1.Controls.Add(pictureBox1); 
      pictureBox1.Parent = panel1; 
      img = pictureBox1.Image; 
      tmpSx = (Image)img.Clone(); 
      tmpSx.RotateFlip(RotateFlipType.RotateNoneFlipX); 
      tmpDx = (Image)img.Clone(); 
      tmpDw = (Image)img.Clone(); 
      tmpDw.RotateFlip(RotateFlipType.Rotate90FlipNone); 
      tmpUp = (Image)img.Clone(); 
      tmpUp.RotateFlip(RotateFlipType.Rotate270FlipNone); 

      //COMPARSA NEMICO 

      tmEnem.Interval = 5000; 
      enemy = new EventHandler(Appear); 
      tmEnem.Tick += enemy; 
      tmEnem.Start(); 
     } 

     private void Form1_KeyDown(object sender, KeyEventArgs e) 
     { 
      if (e.KeyCode == Keys.D) 
      { 
       pictureBox1.Image = tmpDx; 
       pictureBox1.Location = new Point(pictureBox1.Location.X + 15, pictureBox1.Location.Y); 
       pictureBox1.SendToBack(); 
      } 
      else if (e.KeyCode == Keys.A) 
      { 
       pictureBox1.Image = tmpSx; 
       pictureBox1.Location = new Point(pictureBox1.Location.X - 15, pictureBox1.Location.Y); 
       pictureBox1.SendToBack(); 
      } 
      else if (e.KeyCode == Keys.W) 
      { 
       pictureBox1.Image = tmpUp; 
       pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y - 15); 
       pictureBox1.SendToBack(); 
      } 
      else if (e.KeyCode == Keys.S) 
      { 
       pictureBox1.Image = tmpDw; 
       pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y + 15); 
       pictureBox1.SendToBack(); 
      } 
      else if (e.KeyCode == Keys.Space) 
      { 
       if (go) 
       { 
        Image fire = Image.FromFile(@"c:\users\user\documents\visual studio 2015\Projects\Gioco\Gioco\Resources\494979.gif"); 
        PictureBox picFire = new PictureBox(); 
        fireBox.Add(picFire); 
        count++; 
        picFire.Image = fire; 
        picFire.Visible = true; 
        picFire.BackColor = Color.Transparent; 
        picFire.BringToFront(); 
        picFire.SizeMode = PictureBoxSizeMode.Zoom; 

        switch (Direction(pictureBox1)) 
        { 
         case "dx": 
          picFire.Location = new Point(pictureBox1.Location.X + pictureBox1.Width, pictureBox1.Location.Y + pictureBox1.Height/2); 
          panel1.Controls.Add(picFire); 
          tm.Interval = 35; 
          test = new EventHandler(tm_TickDx); 
          tm.Tick += test; 
          tm.Start(); 
          break; 
         case "sx": 
          picFire.Location = new Point(pictureBox1.Location.X - picFire.Width, pictureBox1.Location.Y + pictureBox1.Height/2); 
          panel1.Controls.Add(picFire); 
          tm.Interval = 35; 
          test = new EventHandler(tm_TickSx); 
          tm.Tick += test; 
          tm.Start(); 
          break; 
         case "up": 
          picFire.Location = new Point(pictureBox1.Location.X + pictureBox1.Width/2, pictureBox1.Location.Y - picFire.Height); 
          panel1.Controls.Add(picFire); 
          tm.Interval = 35; 
          test = new EventHandler(tm_TickUp); 
          tm.Tick += test; 
          tm.Start(); 
          break; 
         case "dw": 
          picFire.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y + pictureBox1.Height); 
          panel1.Controls.Add(picFire); 
          tm.Interval = 35; 
          test = new EventHandler(tm_TickDw); 
          tm.Tick += test; 
          tm.Start(); 
          break; 
        } 

       } 

      } 
     } 

     void Appear(object sender, EventArgs e) 
     {   
       Image imgEnemy = Properties.Resources.tengu_warrior_enemy_sprite_by_sanctumpolis_d6wsk6q; 
       PictureBox picEnemy = new PictureBox(); 
       picEnemy.SizeMode = PictureBoxSizeMode.Zoom; 
       picEnemy.Image = imgEnemy; 
       Random rand = new Random(DateTime.Now.Millisecond); 
       Point random = new Point(rand.Next(0, ClientSize.Width - picEnemy.Width), rand.Next(0, ClientSize.Height - picEnemy.Height)); 
       picEnemy.Location = random; 
       panel1.Controls.Add(picEnemy); 

     } 

     void tm_TickDx(object sender, EventArgs e) 
     { 
      go = false; 
      if (!go) 
      { 
       if(fireBox[count - 1].Location.X < panel1.Location.X + panel1.Width) 
       { 
        fireBox[count - 1].Left = fireBox[count - 1].Left + 25; 
       } 
       else 
       { 
        tm.Stop(); 
        go = true; 
        tm.Tick -= test; 
       } 

      } 

     } 

     void tm_TickSx(object sender, EventArgs e) 
     { 
      go = false; 
      if (!go) 
      { 
       if (fireBox[count - 1].Location.X > panel1.Location.X - fireBox[count - 1].Width) 
        fireBox[count - 1].Left = fireBox[count - 1].Left - 25; 
       else 
       { 
        tm.Stop(); 
        go = true; 
        tm.Tick -= test; 
       } 

      } 

     } 

     void tm_TickUp(object sender, EventArgs e) 
     { 
      go = false; 
      if (!go) 
      { 
       if (fireBox[count - 1].Location.Y > panel1.Location.Y - fireBox[count - 1].Height) 
        fireBox[count - 1].Top = fireBox[count - 1].Top - 25; 
       else 
       { 
        tm.Stop(); 
        go = true; 
        tm.Tick -= test; 
       } 

      } 

     } 

     void tm_TickDw(object sender, EventArgs e) 
     { 
      go = false; 
      if (!go) 
      { 
       if (fireBox[count - 1].Location.Y < panel1.Location.Y + panel1.Height) 
        fireBox[count - 1].Top = fireBox[count - 1].Top + 25; 
       else 
       { 
        tm.Stop(); 
        go = true; 
        tm.Tick -= test; 
       } 

      } 

     } 

     string Direction(PictureBox p) 
     { 
      if (p.Image == tmpDx) 
       return "dx"; 
      else if (p.Image == tmpSx) 
       return "sx"; 
      else if (p.Image == tmpUp) 
       return "up"; 
      else if (p.Image == tmpDw) 
       return "dw"; 
      return "dx"; 
     } 

    } 
} 

Answer 1

正如他們在評論中所說：檢查碰撞在您的移動事件中。
我已經放置了一些評論來描述它的工作原理。

代替how-to想象它

// Place this code for all of your move-events. 
void tm_TickDx(object sender, EventArgs e) 
{ 
    go = false; 
    if (!go) 
    { 
     // Foreach control inside your panel 
     foreach (Control enemie in panel1.Controls) 
     { 
      // If control is a PictureBox - preventing future features 
      if(enemie.GetType() == typeof(PictureBox)) 
      { 
       // Foreach fireball thats moving - could get filtered better 
       foreach(Control fireball in fireBox) 
       { 
        // If there IS a collision between enemie and fireball 
        if (enemie.Bounds.IntersectsWith(fireball.Bounds)) 
        { 
         panel1.Controls.Remove(enemie); 
        } 
       } 
      } 
     } 
     if (fireBox[count - 1].Location.X < panel1.Location.X + panel1.Width) 
     { 
      fireBox[count - 1].Left = fireBox[count - 1].Left + 25; 
     } 
     else 
     { 
      tm.Stop(); 
      go = true; 
      tm.Tick -= test; 
     } 

    } 

} 

更優雅的方式使用LINQ

void CheckCollision() 
{ 
    // Get all enemies from playground 
    var enemies = panel1.Controls.Cast<Control>(); 
    // Compare bounds of all fireboxes to bounds of enemies 
    var colidedEnemies = enemies.Where(en => 
         fireBox.Any(fb => fb.Bounds.IntersectsWith(en.Bounds))); 

    // Delete all collided enemies 
    colidedEnemies.ToList().ForEach(en => panel1.Controls.Remove(en)); 
} 

void tm_TickDx(object sender, EventArgs e) 
{ 
    go = false; 
    if (!go) 
    { 
     // Check collision 
     CheckCollision(); 
     if (fireBox[count - 1].Location.X < panel1.Location.X + panel1.Width) 
     { 
      fireBox[count - 1].Left = fireBox[count - 1].Left + 25; 
     } 
     else 
     { 
      tm.Stop(); 
      go = true; 
      tm.Tick -= test; 
     } 

    } 

} 

void tm_TickSx(object sender, EventArgs e) 
{ 
    go = false; 
    if (!go) 
    { 
     // Check collision 
     CheckCollision(); 
     if (fireBox[count - 1].Location.X > panel1.Location.X - fireBox[count - 1].Width) 
      fireBox[count - 1].Left = fireBox[count - 1].Left - 25; 
     else 
     { 
      tm.Stop(); 
      go = true; 
      tm.Tick -= test; 
     } 

    } 

} 

void tm_TickUp(object sender, EventArgs e) 
{ 
    go = false; 
    if (!go) 
    { 
     // Check collision 
     CheckCollision(); 
     if (fireBox[count - 1].Location.Y > panel1.Location.Y - fireBox[count - 1].Height) 
      fireBox[count - 1].Top = fireBox[count - 1].Top - 25; 
     else 
     { 
      tm.Stop(); 
      go = true; 
      tm.Tick -= test; 
     } 

    } 

} 

void tm_TickDw(object sender, EventArgs e) 
{ 
    go = false; 
    if (!go) 
    { 
     // Check collision 
     CheckCollision(); 
     if (fireBox[count - 1].Location.Y < panel1.Location.Y + panel1.Height) 
      fireBox[count - 1].Top = fireBox[count - 1].Top + 25; 
     else 
     { 
      tm.Stop(); 
      go = true; 
      tm.Tick -= test; 
     } 
    } 
} 

學分：
How to check if two controls are overlapping in Windows Forms
LINQ query to find if items in a list are contained in another list