blur() call is not forwarded to <TextInput />

[kkgelu]

By checking the issue facebook/react-native#113 I learned that I can call blur() to lose focus on a text input, the following code:

 <TextInput   ref='REF_MY_INPUT'

When this text input is focused, calling this.refs.REF_MY_INPUT.blur() works just fine, it loses focus on the input and dismisses keyboard.

But it does not work on

 <MKTextField   ref='REF_MY_INPUT'

The use case is I am validating the user input on every text change, when it reaches to an valid state, it automatically loses focus/dismissed keyboard on that input area.