This simple custom keyboard allows the user to enter card suits into a text field by selecting the desired pip for the suit.
The app was based on the following:
https://stackoverflow.com/questions/33474771/a-swift-example-of-custom-views-for-data-input-custom-in-app-keyboard/33692231#33692231 https://riptutorial.com/ios/example/16976/create-a-custom-in-app-keyboard