CS 185C/286 - Lecture 13

Cay S. Horstmann

Lecture 13 Quiz 1

When you write a file in Objective C, how do you get notified if there is an error?

1. The writeToFile method returns YES if it succeeded, NO if it failed.
2. The writeToFile method returns an integer error code.
3. You pass a pointer to an NSError object that is filled with an error descriptor if an error occurred.
4. An exception is thrown that you should catch.

Lecture 13 Quiz 2

What is true about Objective-C protocols?

1. They are like generics in Java. For example, @protocol Fred <P1, P2> means that Fred has type parameters P1 and P2.
2. They are like multiple inheritance in C++. For example, @protocol Fred <P1, P2> means that Fred inherits from P1 and P2.
3. They are like interfaces in Java. For example, @protocol Fred <P1, P2> means that Fred implements P1 and P2.
4. None of the above

Today's Lecture/Lab

• Exam review
• Project status presentations
• iOS tables

Table Views

• Tables are everywhere
• 

Table Views

• Table view instance of UITableView
• Each row is instance of UITableViewCell
• 
• Table gets data from object conforming to UITableViewDelegate protocol
• Row data from object conforming to UITableViewDataSource protocol
• Row data is cached but needs to be re-supplied on demand

Table Styles

• Grouped, plain, indexed
• 
• Each division is a section

Reading Before Next Class

• Read chapter 8 (Introduction to Table Views) in Beginning iOS 5 Development

Lab

• Bring your laptop to the lab
• You will work with a buddy
• For this lab, match yourself up with a buddy who has a Mac
• I want you to submit your lab code to git. But don't use the git support in the IDE.
• Instead, tell XCode to put your (unmanaged) project into the workspace/lab13 directory.

Simple Tables

• Follow the iPhone programming book Chapter 8, Implementing a Simple Table
• Add a table view as described.
• Wire the controller as described. Which methods belong to the UITableViewDelegate protocol and which to UITableViewDataSource?
• Go on to the section "Adding an image". Just use this image.
• Now use this image for the Disney dwarves (up to Dopey), and the other image for the Tolkien dwarves. How do you do that?