Demo1:
主要知识：navigator,fecth
地址：https://github.com/hongguangKim/ReactNativeDEMO1
Demo2:
主要知识：navigator,fecth，react-native-tab-navigator
地址：https://github.com/hongguangKim/ReactNativeDEMO2
Demo3:
主要知识：react-native-swiper,Animated
地址：https://github.com/hongguangKim/ReactNativeDEMO3
