// In my case I was using an android library that was 
// not available in ios (StatusBar.currentHeight). 
// I had to adapt my code:
const theView = styled.View`
  margin-top:${StatusBar.currentHeight}
`;
// to:
const theView = styled.View`
  ${StatusBar.currentHeight && `margin-top:${StatusBar.currentHeight}px`};
`;