Conclusion

Some final notes:

This tutorial hopefully got you started! You’ll be able to create a nice functional basic app from what you’ve seen here. Remember, if you have questions please do ask on Piazza.

Navigating to a new page

Whenever we’d like to navigate to a new page we can use the navigator prop. All direct children of a Screen (Stack.Screen in App.js) will have a navigator property passed to it.

For instance, if you’d like to navigate to the “Links” page from the “HomePage”, you can use the following code.

this.props.navigator.navigate("Links")

The name for the destination corresponds with the Screen name. In this case, see the BottomTabNavigator.js file.

Storing, Getting, and Deleting data on the phone

For the login session storing we use SessionStorage in this tutorial. Here’s a quick overview of how you can set, get, and delete data there.

Set Data

SecureStore.setItemAsync('some-key').then(() => {
  console.log("This code runs whenever the data has finished being stored);
})

Get Data

SecureStore.getItemAsync('some-key').then(returnValue => {
  console.log("I got something " + returnValue);
});

Delete Data

SecureStore.deleteDataAsync('some-key').then(() => {
  console.log("This code runs whenever the data has finished being deleted);
})

Full documentation of SecureStore can be found on the Expo website https://docs.expo.io/versions/latest/sdk/securestore/