June 2011
Intermediate to advanced
590 pages
19h 31m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Declarations
To manage its relationships and responsibilities, QuizAppDelegate needs five instance variables and two methods. In this section, you will declare these in the QuizAppDelegate header file, QuizAppDelegate.h.
Declaring instance variables
Here are the five instance variables QuizAppDelegate needs:
- questions
- a pointer to an NSMutableArray containing instances of NSString
- answers
- a pointer to another NSMutableArray containing instances of NSString
- currentQuestionIndex
- an int that holds the index of the current question in the questions array
- questionField
- a pointer to the UILabel object where the current question will be displayed
- answerField
- a pointer to the UILabel object where the current answer will be displayed
In the project navigator, ...
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