项目常用第三方库

下拉刷新	https://github.com/CoderMJLee/MJRefresh
模型转换	https://github.com/CoderMJLee/MJExtension
网络请求	https://github.com/AFNetworking/AFNetworking
网络图片	https://github.com/rs/SDWebImage
数据库	https://github.com/ccgus/fmdb
loading	https://github.com/jdg/MBProgressHUD
自动布局	https://github.com/SnapKit/Masonry
键盘处理	https://github.com/hackiftekhar/IQKeyboardManager