React Native FlatList separator between columns

Question

I have a FlatList with multiple columns:

    <FlatList
      numColumns={4}
      ItemSeparatorComponent={this.renderSeparator}
      ...
    </FlatList>

And a line separator:

  renderSeparator = () => (
    <View
      style={{
        backgroundColor: 'red',
        height: 0.5,
      }}
    />
  );

But the separator only appear between rows, not between columns (even if i add width: 0.5

View on expo

Answer 1

you can just add if else condition inside renderItems and check the index modulus to add separator.. I just use this one and everything works great.

something like :-

_renderItem = ({item,index}) => {
   return(
      <View style={[{ backgroundColor: 'red', flex: 1 }, index%2==0 ? { marginRight: 10 } : { marginLeft: 10 } ]}>
         <Text>{item.key}</Text>
      </View>
   )
}

hope this will help you.