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iOS 5 App Development Objective C

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. Why properties?
Hash table - Look up objects using a key to get a value.
safety - subclassability and makes code look more consistent with C structs
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
receiver - selector - arguments

2. What happens when the last owner calls release?

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3. If the view has no subviews - create it programmatically; if it has subviews
accessors - individually we call them 'getters' and 'setters'
self
create a XIB file
CF - Ref

4. Each individual instance is a bundle of data that it maintains. Typically that data is private - which means that it's encapsulated as well; no other object knows what that data is or in what form it is kept. The only way to discover from outside wha
type - name and value
NSBundle
values
Maintenance of state

5. A view is an...
instance of UIView or one of its subclasses
super - self
data
upper

6. Use of class methods - there are three...
instance of UIView or one of its subclasses
an object's property
alloc - singleton - informational utility method?
class's

7. When the message endEditing: is sent to a view - if it or any of its subviews or currently the _ - it will resign its first responder statues - and the keyboard will be dismissed.
first responder
position
'getters' and 'setters'
Controller Objects[Managers]

8. We can use dot notation to reference...

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9. When an object is removed from an NSMutableArray - that object is sent the message release;...
Model Objects[Factory Worker]
they need to be defined in the implementation file
the array relinquishes ownership of that object and no longer has a pointer to it
upper

10. Proceed through the loop - jump back to the top and check again
Continue
initializers
self
parentViewController

11. Origin of a view's coordinate system is _ left
receiver - selector - arguments
upper
Functions
size and position

12. Designated initializer makes sure that every...
instance variable of an object is valid
in the dealloc - or when a Controller's view is 'unloaded'
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
define it in the implemenation file

13. Each _ has a 'designated' initializer method....
class
instance variables
attributes - behavior
ready-made instances - instantiation from scratch - and nib based instantiation

14. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
view
Controller Objects[Managers]
delegates and dataSources
object

15. In Objective C - the name of a setter method is set plus the name of the instance variable it is changing - for example PossessionName would be...
methods for generating an instance
is an instance of that class
setPossessionName
receiver - selector - arguments

16. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
Maintenance of state
UIViewController
delegates and dataSources
initializers

17. When a view controller presents a modal view controller - the _ of the modal view controller is set to be the parent of the presenting controller
is an instance of that class
receiver[message]
creates an instance of NSString that holds the character string
parentViewController

18. Asking a class or object to execute a method
message
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
unordered collection of objects - objects must be unique
CGFloat

19. NSString* s2 = [s uppercase String]; Is an example of what kind of instance?
ordered collection of objects - immutable
pointer - class
You take ownership for an object you want to keep a pointer to
Ready-Made Instance

20. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
UIViewController
CGFloat
lowercase - uppercase
Encapsulation of functionality

21. Defining variables - three parts...
%d
reuse your cells
lowercase - uppercase
type - name and value

22. Ready-made instances...
CF - Ref
calling code that does the instantiation for you
view controller's initialization method
receiver - selector - arguments

23. To load a Xib file manually - you use _
draw images
CGRect
NSBundle
Core Graphics Framework

24. class methods...
initializers
group of global functions already assigned to this class
draw images
unordered collection of objects - objects must be unique

25. Files Owner...
NSCoder
its dataSource
initializer
Is a placeholder object

26. @property declares - and _ implements the setter and getter...
reuse your cells
unordered collection of objects - objects must be unique
safety - subclassability and makes code look more consistent with C structs
@synthesize

27. The notion that the data for an object is stored in it's instance variables and is accessed only by the objects methods. This maintains the integrity of the data.
Data Encapsulation
C Functionn
receiver - selector - arguments
parentViewController

28. The class is responsible for what instance variables the instance has - but not the _ of those variables.
has one root view controller
values
message
safety - subclassability and makes code look more consistent with C structs

29. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
class
the message release to all its entries
Is a placeholder object
NSCoder

30. In any application with UINavigationController - the navigation controller...
has one root view controller
header files declare
a mechanism to enable specific callbacks
declaration and initialization of a variable

31. A _ handles touch events.
pointers
parentViewController
view
Abstraction

32. You use _ to implement the view
CGRect bounds
Continue
object
pointer - class

33. Class methods do not operate on an _ or have any access to _ variables....
instance
instance of UIView or one of its subclasses
Generic object wrapper for other non-object data types
an object's property

34. NSArray - important methods...
view controller's initialization method
instance variable of an object is valid
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
a single-array can contain objects of different types

35. Three ways instances are created...
ready-made instances - instantiation from scratch - and nib based instantiation
NSBundle
first responder
array[class - NSMutableArray]

36. if you implemented both the setter and getter - the @synthesize method...
Object wrapper around primitive types like int - float - double - BOOl
CGRect bounds - GCPoint center - CGRect frame
NSBundle
will be ignored

37. A responder is responsible for...
receiving and handling events that are associated with it
arguments[message]
Anytime you call a method with new - alloc or copy. You own and must release that object.
header files declare

38. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
methods for generating an instance
@interface ClassName:SuperClassName
CGRect bounds
NSCoder

39. Number one use of protocols in iOS...
instance
create a XIB file
cannot be added to an array
delegates and dataSources

40. In object oriented languages - we call methods that get and set instance variables

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41. Never access a view controller's view in that...

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42. Delegation is an object oriented approach to
callbacks
pointers
nil
wait until the loop finishes processing the event - at the end release it

43. A UITableViewController can fill all three roles of...
receiving and handling events that are associated with it
data source - view controller and delegate
creating an initializer
protocol

44. If a break statement is executed from within a set of nested loops...
only the innermost loop in which the break is executed is terminated
protocol
has one root view controller
storage

45. Instance Variables by default are called @protected meaning...
C Functionn
methods for generating an instance
is an instance of that class
only the class and subclasses can access

46. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
receiver[message]
in the dealloc - or when a Controller's view is 'unloaded'
header files declare
only the class and subclasses can access

47. A UITableView usually needs three different pieces...
cannot be added to an array
Maintenance of state
Used to find the time right now or to store past or future time/dates
data source - delegate and view controller

48. NSNumber - class...
instance
NSBundle
Object wrapper around primitive types like int - float - double - BOOl
do so in viewDidLoad

49. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
Instantiation from scratch
collection of collections - NSArray of an NSArray
Abstraction
to get and set variables

50. super - is used...
data source - delegate and view controller
for inheritance - adopting the superclasses implementation
Model Objects[Factory Worker]
class's

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iOS 5 App Development Objective C

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