Lesson 15 - iOS Weather Forecast App - The UserDefaults storage
In the previous lesson, iOS Weather Forecast App - JSON and GPS, we made a weather app for iOS work, downloading data from a web service.
I promised to continue with saving data to the "new"
UserDefaults storage in case of the user being offline. We'll learn
to determine that as well.
Saving to UserDefaults
UserDefaults is an easy way to store simple data types
and various data along with them. For this app, e.g. a database wouldn't be the
Before getting started with
UserDefaults, let's open
Main.storyboard and add one more
Label at the top of
StackView. We'll then connect it to the View Controller. You
can name it e.g.
lastUpdateInfo. It'll let the user know when the
data was received.
It's better to drop the
Label to the component list (instead of
dropping to the View Controller preview) by which we can easily place it at the
top of the
StackView. Then we'll just set the font, color and erase
In the next lesson, iOS Weather Forecast App - Final Modifications, we'll add several final features to our forecast app to make it more user-friendly.
...End of the preview...
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In this Swift tutorial, we'll save the weather data into the UserDefaults storage for case of no Internet connection. We'll learn to detect the connection.
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