For numeric 和 number-pad :
似乎你不需要任何图书馆
for normal keyboard you may look at this :
https://github.com/ardaogulcan/react-native-keyboard-accessory
和
https://github.com/douglasjunior/react-native-keyboard-manager
Github thread you need to take a look at :
https://github.com/facebook/react-native/issues/1190
和
https://github.com/facebook/react-native/issues/641
希望有帮助