我用的事Xcode4.0
书上的例子要求，增加两个framework到项目中，一个是AddressBookUI.framework和AddressBook.framework.
我不知道 怎么添加框架。
------解决方案--------------------
select your project,
select the target,
go to the 'build phases' tab,
open the 'Link binary with Libraries' disclosure triangle
Use the + to add the library you want