1bottomCenter: {
2    flex: 1,
3    justifyContent: 'flex-end',
4    marginBottom: 30
5}

1<View>
2    <Image
3        source={require('../images/AppIntro/1.png')} 
4        style={{ width: '100%', height: 150 }}
5    />
6    <Icon name="md-close" 
7          style={{
8                position: 'absolute',
9                right: 5,
10                top: 5,
11          }} />
12</View>

1button: {  position: 'absolute',  bottom:0}