- http://docs.nativebase.io/docs/examples/ReduxCounterExample.html
- ACR: component连接了Action和Reducer
- 1 用户交互component触发action，
- 2 action传给Reducer拿到数据，
- 3 然后反向传播，数据传给component的props，render。。
// Provider component makes the store available throughout our App // Reducers will return the data needed by our app,然后把data传给控件的props // We will simply create two actions Increment and Decrement.