通过程序的编写，实现了图片的浏览，可以上下翻滚图片，查找图片，方便大家的使用，同时提高了大家学习iOS开发的兴趣。适合初学者使用。(This paper through programming, we can browse pictures, roll up pictures and find pictures, which is convenient for everyone to use. At the same time, we have improved interest in lear