打开图片并实现图片的放大缩小功能，除此之外，还实现了图片旋转，比如可以左转、右转，还可以列印图片，也就是打印图片，另外还有另存为图片和动态替换-Open the picture and realize the picture zoom function, in addition, also realized the picture rotation, for example, can turn left, turn right, you can print the picture, that i