vc做的是图片逐渐显示和逐渐隐藏的效果，是界面编程的好离子 vc做的是图片逐渐显示和逐渐隐藏的效果，是界面编程的好离子-vc do is picture gradually and gradually hidden effect interface programming is a good ion vc do is picture gradually and gradually hide the effect of the good programming interface Ion