運動軌跡

程式碼:四個timer實現:

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

namespace _07氣泡屏保
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Label lb = new Label();//例項化建立一個新的物件
        Timer time = new Timer();//建立一個timer
        Timer time1 = new Timer();
        Timer time2 = new Timer();
        Timer time3 = new Timer();
        private void Form1_Load(object sender, EventArgs e)
        {
            this.FormBorderStyle = FormBorderStyle.None;//去邊框
            this.WindowState = FormWindowState.Maximized;//視窗最大化
            lb.Text = "不許碰";//新增text文字
            lb.Font = new Font("宋體",40);//設定文字
            lb.AutoSize = true;//設定lable自適應內容大小
            this.Controls.Add(lb);//將建立的lable裝進this控制元件集合裡面
            
            time.Interval = 10;//設定timer的頻率
            //+ = tab tab
            time.Tick += Time_Tick;
            //啟動定時器的兩種方式
            time.Start();
            // time.Enabled = true;
            time1.Interval = 10;
            time1.Tick += Time1_Tick;
            time2.Interval = 10;
            time2.Tick += Time2_Tick;
            time3.Interval = 10;
            time3.Tick += Time3_Tick;
        }

        private void Time3_Tick(object sender, EventArgs e)
        {
            lb.Top -= 2;
            if (lb.Top==0)
            {
                time3.Stop();
                time.Start();
            }
        }

        private void Time2_Tick(object sender, EventArgs e)
        {
            lb.Left -= 2;
            if (lb.Left==0)
            {
                time2.Stop();
                time3.Start();
            }
        }

        private void Time1_Tick(object sender, EventArgs e)
        {
            lb.Top += 2;
            if (lb.Top+lb.Height>=this.Height)
          //if(lb.Top+lb.Height>=Screen.PrimaryScreen.Bounds.Height)
            {
                time1.Stop();
                time2.Start();
            }
        }

        private void Time_Tick(object sender, EventArgs e)
        {
            lb.Left = lb.Left + 2;
            //兩種判斷方法
            //if (lb.Left+lb.Width>=this.Width)
            if (lb.Left + lb.Width >= Screen.PrimaryScreen.Bounds.Width)
            {
                time.Stop();
                time1.Start();
            }
        }
    }
}
 

一個timer實現:

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

namespace _08氣泡屏保一個timer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Label lb = new Label();
        Timer time = new Timer();
        private void Form1_Load(object sender, EventArgs e)
        {
            this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            lb.Text = "不許碰";
            lb.Font = new Font("宋體", 40);
            lb.AutoSize = true;
            this.Controls.Add(lb);
            time.Interval = 10;
            time.Tick += Time_Tick;
            time.Start();
        }
        int x=5;
        int y=0;
        private void Time_Tick(object sender, EventArgs e)
        {
            if (lb.Top<=0)
            {
                lb.Left += 5;
            }
            if (lb.Left+lb.Width>=this.Width)
            {
                lb.Top += 5;
            }
            if (lb.Top+lb.Height>=this.Height)
            {
                lb.Left -= 5;
            }
            if (lb.Left<=0)
            {
                lb.Top -= 5;
            }
        }
    }
}