安全加密:https://github.com/liufan321/NSString-Hash
上拉/下拉刷新:https://github.com/itheima-developer/HMRefresh
照片选择:https://github.com/itheima-developer/HMImagePicker
交互式图像浏览:https://github.com/itheima-developer/HMPhotoBrowser
二维码扫描/识别:https://github.com/liufan321/HMQRCodeScanner
OC语法糖:https://github.com/itheima-developer/HMObjcSugar
FFLabel:https://github.com/liufan321/FFLabel
表情键盘:https:github.com/itheima-developer/HMEmoticon
Socket:https://github.com/robbiehanson/CocoaAsyncSocket