c# - 从动态列表 PictureBox 移动图像

Question

感谢 Stack Overflow，我正在开始编程。我正在用c#做的游戏，由几只蜜蜂在桌面上飞来飞去，我必须给它点击，SCORE会增加一定的时间。我做了以下操作:

• 动态创建列表 PictureBox(在运行时):OK
• 用这些 GIF 图像随机加载 PictureBox:OK

![蜜蜂游戏][1]

在这部分我卡住了:

• 随机放置这些 PictureBox(在表单底部)。
• 使 PictureBox 随机移动(或多或少标记的路线)。
• 每个 PictureBox 单击事件，更改 PictureBox 图像并隐藏(visible = false)，并增加 SCORE + 1。

我需要帮助。我的代码如下:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace MiPrimerJuego
{
    public partial class Form1 : Form
    {        
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int x = 20;
            int y = 600;
            List<System.Windows.Forms.PictureBox> objeto = new List<PictureBox>();
            for (int i = 0; i < 10; i++, x += 90)
            {
                PictureBox pBox = new PictureBox();                
                pBox.Height = 80;
                pBox.Width = 50;
                pBox.Location = new System.Drawing.Point(x, y);
                objeto.Add(pBox);
                pBox.SizeMode = PictureBoxSizeMode.StretchImage;                
                Controls.Add(pBox);

                var rand = new Random();
                var files = Directory.GetFiles(Application.StartupPath + @"/Images", "*.gif");
                pBox.Image = System.Drawing.Bitmap.FromFile(files[rand.Next(files.Length)]);
            }
        }        
    }
}

Answer 1

将for循环外的rand和files以及函数/void外的objeto声明为私有(private)成员变量:

    private List<PictureBox> objeto = new List<PictureBox>();

    private void button1_Click(object sender, EventArgs e)
    {
        var files = Directory.GetFiles(Application.StartupPath + @"/Images", "*.gif");                          
        int x = 20;
        int y = 600;
        var rand = new Random();
        for (int i = 0; i < 10; i++) 
         {
            x += 90;
            PictureBox pBox = new PictureBox();                
            pBox.Height = 80;
            pBox.Width = 50;
            pBox.Location = new System.Drawing.Point(x, y);
            objeto.Add(pBox);
            pBox.SizeMode = PictureBoxSizeMode.StretchImage;                
            Controls.Add(pBox);

            pBox.Image = System.Drawing.Bitmap.FromFile(files[rand.Next(files.Length)]);
        }
    }        
}