Flexible rows

In this section, you'll learn how to make screen layout sections stretch from top to bottom. To do this, you need a flexible row. Here is what the styles for this screen look like:

import { Platform, StyleSheet, StatusBar } from "react-native";

export default StyleSheet.create({
  container: {
    flex: 1,
    flexDirection: "row",
    backgroundColor: "ghostwhite",
    alignItems: "center",
    justifyContent: "space-around",
    ...Platform.select({
      ios: { paddingTop: 20 },
      android: { paddingTop: StatusBar.currentHeight }
    })
  },

  box: {
    width: 100,
    justifyContent: "center",
    alignSelf: "stretch",
    alignItems: "center",
    backgroundColor: "lightgray",
    borderWidth: 1,
    borderStyle: "dashed",
    borderColor: "darkslategray"
  },

  boxText: {
    color: "darkslategray",
    fontWeight: "bold"
  }
}); 

Here's the App component...