这段代码较多，但是如果您把它理解成是将三个不同页面集合在一个页面，就会相对比较好理解。

This is a lot of code but if you think about it as three different pages all in one page, it's a little easier to follow.

youdao

这段代码较多，但是如果您把它理解成是将三个不同页面集合在一个页面，就会相对比较好理解。

This is a lot of code but if you think about it as three different pages all in one page, it's a little easier to follow.

youdao