以图片为背景的标题栏

代码说明：

  常见的标题栏颜色都是系统默认的蓝色，比较单调，本程序演示的自定义处理的标题栏，效果相当独特。(common title bar system default colors are blue, a rather monotonous, as demonstrated by the procedures defined the title bar, the results are pretty unique.)