columnStretch.js

render() {
 return ( 
 <View style = {{
    flex: 1,
    flexDirection: ‘column’,
    alignItems: ‘stretch’,
   }
  } >
  < View style = {{height: 50,backgroundColor: ‘powderblue’}} />
  < View style = {{height: 50,backgroundColor: ‘skyblue’}} />
  < View style = {{height: 50,backgroundColor: ‘steelblue’}} />
 </View>
 );
}
};