如何在移动时将图片框保持在窗体中？

问题描述：

我试图做一个单一的游戏，但我在这里得到了一个小问题... 我正在移动带箭头键的图片盒，以避免其他图片盒...问题是，我的图片盒移出当我按下左键太多次时，我就成功地解决了这个问题（通过阻塞另一个盒子），但左侧版本仍然不起作用，知道为什么...如何在移动时将图片框保持在窗体中？

下面是代码：

if (pictureBox7.Bounds.IntersectsWith(pictureBox1.Bounds)) 
      switch (e.KeyCode) 
      { 
       case Keys.Escape: Application.Exit(); break; 
       case Keys.P: timerkunai1.Enabled = false; 
        timerkunai2.Enabled = false; timerkunai3.Enabled = false; 
        timerkunai4.Enabled = false; timerninja.Enabled = false; 
        timerlife.Enabled = false; 
        button3.Show(); break; 
       case Keys.Right: i = 6; dx = 25; press = true; break;    
      } 
     if (pictureBox8.Bounds.IntersectsWith(pictureBox1.Bounds)) 
      switch (e.KeyCode) 
      { 
       case Keys.Escape: Application.Exit(); break; 
       case Keys.P: timerkunai1.Enabled = false; 
        timerkunai2.Enabled = false; timerkunai3.Enabled = false; 
        timerkunai4.Enabled = false; timerninja.Enabled = false; 
        timerlife.Enabled = false; 
        button3.Show(); break; 
       case Keys.Left: i = 0; dx = -25; press = true; break; 
      } 
     else 
      switch (e.KeyCode) 
     { 
      case Keys.Escape: Application.Exit(); break; 
      case Keys.P: timerkunai1.Enabled = false; 
       timerkunai2.Enabled = false; timerkunai3.Enabled = false; 
       timerkunai4.Enabled = false; timerninja.Enabled = false; 
       timerlife.Enabled = false; 
       button3.Show(); break; 
      case Keys.Left: i = 0; dx = -25; press = true; break; 
      case Keys.Right: i = 6; dx = 25; press = true; break; 
     }

答

需要编写代码，以检查是否在PictureBox的边界是形式之外。如果图片框移动将导致它超出边界，则阻止移动。类似这样的伪代码： if (pictureBoxZ + dx < 0 || pictureBoxZ + dx > pictureBoxZ.Parent.Width) { //Deny Motion }

答

您的dx变量是否为PictureBox新位置的偏移量？然后限制Location.x以0：

if (pictureBox1.Location.x + dx > 0) 
    pictureBox1.Location += dx;

如果你想限制左右大小，窗体使用的宽度，这样的代码：

if ((pictureBox1.Location.x + dx > 0) && (pictureBox1.Location.x + dx < this.Size.Width - pictureBox1.Size.Width)) 
    pictureBox1.Location += dx;

如何在移动时将图片框保持在窗体中？

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