Hi I'm using react native and react native base and I'm trying to use a FAB as a scroll-to-top button -no other action button inside of it-. Understandibly I could use a button, but the FAB is rather simple to set up.

I have the following code:

```
  <Fab
    active="true"
    containerStyle={{ }}
    style={{ backgroundColor: 'rgba(0, 0, 0)' }}
    position="bottomRight"
    onPress={this.scrollToTop.bind(this)}>
    <Icon name="ios-arrow-up" />
  </Fab>

```

When I press the FAB, not only nothing happens, anything that is "clickable" behind it gets triggered. Any ideas?