一个指纹识别的demo，可以直接在ios开发项目中快速上手指纹识别-A fingerprint identification demo, can be directly in the IOS development project to quickly get started fingerprint identification

一个封装的系统指纹识别方法，可以更方便的回调识别结构(An encapsulated system fingerprint identification method can be a more convenient callback identification structure)