React Native：panresponder本机事件标识符未定义

Question

I have a view

<View style={styles.container} id={'time2'}>
  <Text>hello</Text>
</View>

and onComponentWillMount, I have a pan handler (inside PanResponder.create)

onPanResponderGrant: (evt, gestureState) => {
  console.log('identifier', evt.identifier);
}

but when I press the view, the identifier gets printed out as undefined. Target is also undefined. How do I get the id of my view to print out?

Answer 1

You have to access the identifier from the nativeEvent property of the evt:

onPanResponderGrant: (evt, gestureState) => {
   console.log('identifier', evt.nativeEvent.identifier);
}