Function if

index.js:323–330

(Platform.OS === 'ios')

  _onScroll(e) {
    if (Platform.OS === 'ios') {
      const offsetX = e.nativeEvent.contentOffset.x;
      if (offsetX === 0 && !this.scrollOnMountCalled) {
        this.scrollOnMountCalled = true;
      } else {
        this.props.onScroll(offsetX / this.state.containerWidth);
      }
    } else {
      const { position, offset, } = e.nativeEvent;
      this.props.onScroll(position + offset);
    }