Objective - C Basics

Question 1

interpolate syntax

Answer 1

NSLog(@”%@ %@”, @”Ari”,@”Ingber”);

Question 2

creating an integer variable

Answer 2

NSInteger b = 2;

Question 3

which has methods primitives or objects

Answer 3

objects only

Question 4

4 basic primatives

Answer 4

NSInteger
NSUInteger
CGFloat
BOOL

Question 5

comment styles

Answer 5

/* */ // //

Question 6

what to look for when confronted with incompatible integer to pointer conversion

Answer 6

extraneous *

Question 7

NSInteger Format Specifier

Answer 7

%li

Question 8

NSUInteger Format Specifier

Answer 8

%lu

Question 9

CGFloat Format Specifier

Answer 9

%f or %.nf, where n is the number of decimal places to display

Question 10

BOOL Format Specifier

Answer 10

%d

Question 11

syntax for calling a method and providing argument

Answer 11

ReturnType *captureVariable = [recipientObject methodNameArgument:argumentVariable];

Question 12

xcode quick reference api

Answer 12

⇧⌘0

Question 13

create a simple string using the “string literal” syntax

Answer 13

NSString *welcome = @”Ari is you!”;

Question 14

reserve capital case for

Answer 14

Class names

Question 15

use camel case for

Answer 15

methods and variables

Question 16

if statement syntax

Answer 16

if (condition is true) {
run this code
}

Question 17

syntax for creating empty mutable array

Answer 17

NSMutableArray *mEmpty = [[NSMutableArray alloc] init];

Question 18

syntax for creating array w/ fixed element (immutable)

Answer 18

NSArray *instructors = @[ @”Joe”, @”Tim”, @”Jim”, @”Tom”, @”Mark” ];

Question 19

4 elements of a method call (how to make a method call)

Answer 19

ReturnType *captureVariable = [recipientObject methodNameArgument:argumentVariable];

Question 20

define method

Answer 20

a method is a behavior that an object can perform upon itself.