winForm 图片实现自动旋转,两个图片透明重叠

核心代码如下

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public Bitmap picRotate(Bitmap bmp, int angle) {      //转载请保留http://www.luofenming.com/show.aspx?id=ART2019112900001     Bitmap reBmp = new Bitmap(bmp.Width, bmp.Height);     Graphics g = Graphics.FromImage(reBmp);     g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;//选择模式     g.TranslateTransform((float)bmp.Width / 2, (float)bmp.Height / 2); //参数为旋转中心     g.RotateTransform(angle);//设置旋转角度     g.TranslateTransform(-(float)bmp.Width / 2, -(float)bmp.Height / 2);     g.DrawImage(bmp, new Point(0, 0));     return reBmp;//返回旋转后的图片 }   public void Transform() {     Bitmap bmp = new Bitmap(Resources.动效2);     pictureBox1.BackgroundImage = bmp;     Bitmap bmp1 = new Bitmap(Resources.动效4);//bmp即为我们的原型图片     pictureBox2.BackgroundImage = bmp1;//将图片作为picturebox背景，方便展示     this.BeginInvoke((EventHandler)(delegate     {         pictureBox2.Parent = pictureBox1;//在box1上显示Box2     }));     int angle = 0;     int angle1 = 360;     while (true)     {         this.BeginInvoke((EventHandler)(delegate         {             pictureBox1.BackgroundImage = picRotate(bmp, angle);//将旋转后的图片设置为picturebox1背景         }));         angle += 15;//每次增加5度         if (angle >= 360)         {             angle = 0;         }         this.BeginInvoke((EventHandler)(delegate         {             pictureBox2.BackgroundImage = picRotate(bmp1, angle1);//将旋转后的图片设置为picturebox2背景         }));         angle1 -= 15;//每次减5度         if (angle1 <= 0)         {             angle1 = 360;         }         Thread.Sleep(50);     } } /// <summary> /// 调用 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) {     Thread th = new Thread(Transform);     th.IsBackground = true;     th.Start(); }

实例源码下载地址：https://pan.baidu.com/s/1Wfzd3BgvgzgERMRqWhWQew 提取码：ivuv
效果如下