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