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iOS Persistence and Core Data

via Udacity

students interested
Persisting data is a core skill for any iOS developer. This course will teach you three techniques for storing data to your device’s hard drive: NSUserPreferences for small amounts of data, the Sandbox for files and Core Data when you have to play in the Big Leagues!

Why Take This Course?
Just like computers, your iPhone has two types of memory: main memory (RAM) and the hard drive. In all the apps you’ve written, you’ve interacted with RAM, but this memory is limited, and it’s important that the apps you design use it as efficiently as possible. To use the RAM efficiently it is important to be able to store data on the hard drive.

It is also important for your apps to maintain state when they are turned off. The apps you’ve built probably aren’t persistent, meaning that they don’t save their state to the device’s hard drive. As RAM is volatile, data is lost when the app stops running. In this course, you’ll learn how to persist the state of the device using NSUserDefaults and Core Data.

Taught by

Jason Schatz
FAQ View All
What are MOOCs?
MOOCs stand for Massive Open Online Courses. These are free online courses from universities around the world (eg. Stanford Harvard MIT) offered to anyone with an internet connection.
How do I register?
To register for a course, click on "Go to Class" button on the course page. This will take you to the providers website where you can register for the course.
How do these MOOCs or free online courses work?
MOOCs are designed for an online audience, teaching primarily through short (5-20 min.) pre recorded video lectures, that you watch on weekly schedule when convenient for you.  They also have student discussion forums, homework/assignments, and online quizzes or exams.

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