Goals

This homework exercise will continue modifying the lab application from this class and allow you to invoke the Delete operation using a swipe gesture on the ListView.

Assets

This exercise continues where we left off in the class. If you did not have time to complete the final exercise, you can start with the completed project in Exercise 5. There is a final, completed project in the Homework folder.

Challenge

This exercise takes the application you worked with in the class and adds support to invoke the "delete" operation through a swipe gesture.

Here are the basic steps you will go through:

1. Add a new MenuItem to the ContextActions collection on the ImageCell.
   • Add a Clicked handler named OnDelete.
   • Set the Text to "Delete".
   • Set the IsDestructive property to "True".
2. Implement the OnDelete logic - it should share the core logic from your existing code that prompts and then deletes a contact. You can get the correct Flag object through the passed MenuItem's BindingContext.
3. Run the application, on iOS you can get the menu by swiping to the left, on Android and UWP, it's a long-press action. It should looks something like this:

Summary

Congratulations! In this homework exercise you have added a more convenient way to delete contacts.