相关ios7新特性 帖子。挺全的。一定要看看哪
http://www.devdiv.com/iOS_iPhone-ios_ui_uikit_text_kit_-thread-203631-1-1.html
英文版 需FQ
http://www.shinobicontrols.com/blog/posts/2013/09/19/introducing-ios7-day-by-day
