Application Development with Swift 2 (Video 22)

This video tutorial demonstrates how to use NSUserDefaults in iOS to persist small amounts of data. It covers setting up a dream instance, saving data using NSUserDefaults, and retrieving and displaying the data in a table view. The tutorial also includes testing the implementation and concludes with a summary of the navigation and data passing between view controllers.

What is the primary use of NSUserDefaults in iOS development?

• To store large files securely

• To manage user interface layouts

• To persist small amounts of data

• To handle network requests

Which method is used to save an array of objects to NSUserDefaults?

• writeObjects:forKey:

• storeData:withKey:

• saveArray:toKey:

• setObject:forKey:

What should you do if there is no existing array in NSUserDefaults when saving data?

• Throw an error

• Create a new array with one object

• Ignore the data

• Overwrite the existing data

When should the data be refreshed in the table view controller?

• When the user logs out

• After the view disappears

• Before the view appears

• When the app launches

What is the purpose of the 'viewWillAppear' method in this context?

• To initialize the view controller

• To refresh and reload data

• To save data to NSUserDefaults

• To handle user interactions

How do you ensure changes are saved back to NSUserDefaults after modifying items?

• By updating the array and saving it again

• By using a background thread

• By using a temporary cache

• By restarting the application

What is demonstrated at the end of the video?

• A new feature implementation

• The completed functionality of passing objects

• An error handling mechanism

• A user interface redesign