This is a program to demonstrate the new BackgroundTasks framework in iOS.
I read a number of articles about the new framework:
-
Myrick Chow: Swift iOS BackgroundTasks framework — Background App Refresh in 4 Steps.
-
Andy Ibanez: (Modern Backgrounds Tasks in iOS 13)[https://www.andyibanez.com/posts/modern-background-tasks-ios13/], especially from the Pokémon retrieval.
-
Yuvrajsinh Vaghela: (How to Update App Content With Background Tasks Using The Task Scheduler In iOS 13?)[https://dzone.com/articles/how-to-update-app-content-with-background-tasks-us]
-
Hitesh Trivedi: (How To Use BackgroundTasks Framework To Keep your iOS App Content Up To Date?)[https://www.spaceotechnologies.com/ios-background-task-framework-app-update/]
It also borrows from the sample by Apple: Refreshing and Maintaining Your App Using Background Tasks
I have tried to separate management of the background task(s) from both AppDelegate and SceneDelegate. I have also tried to separate the actual task execution from its management.
It saves the results of its fetches in an array, which it writes to a JSON file. It displays the array of results in a UITableView. It includes a way to manually fetch a random Pokémon. It includes pull-to-refresh to update the display, just in case.
I added a Today widget to display the results of the most recent fetch without actually loading the application.
It took me a while to be certain that it works. It's interesting that Apple's (ColorFeed) demo doesn't make any network calls. Andy Ibanez's sample doesn't appear to fetch Pokémon either.
I did make old style background fetch work in my TodayWidgetDemo.