DAY 48


Douglas Adams once said, “most of the time spent wrestling with technologies that don't quite work yet is just not worth the effort for end users, however much fun it is for nerds like us.” And of course he was right: when software doesn’t quite work we sometimes see it as a challenge to find a workaround, whereas everyone else in the world just gets annoyed or gives up.

Think about how often you see a Save button in iOS. Hardly ever, right? This isn’t an accident: iOS makes it look like all apps are running all the time when really they get backgrounded or even terminated all the time, but users don’t want to have to think about saving files before a program is quit.

This behavior is a great example of how Apple takes away the annoyance for end users – they don’t have to expend the effort of managing data or worrying about programs, which means they can instead focus on just using their device for the things they actually care about.

Now it falls to us. Project 10 worked great, except that it doesn’t save the pictures users add. Today you’re going to learn one of the ways we can fix that, and we’ll look at a different option tomorrow.

Today you have three topics to work through, and you’ll learn about UserDefaults, NSCoding and more.

Need help? Tweet me @twostraws!


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