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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. Origin of a view's coordinate system is _ left
attributes - behavior
upper
cannot be added to an array
receiver

2. UIImageView is used to...
Instantiation from scratch
Used to find the time right now or to store past or future time/dates
draw images
the message release to all its entries

3. NSSet...
unordered collection of objects - objects must be unique
data
collection of collections - NSArray of an NSArray
an object's property

4. class methods...
receiver
group of global functions already assigned to this class
selector[message]
ready-made instances - instantiation from scratch - and nib based instantiation

5. If you have extra work you want to do on the view...
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
do so in viewDidLoad
CGRect bounds
pointer - class

6. When an object is added to a NSMutableArray - that object is sent the message to retain;...
@synthesize
You take ownership for an object you want to keep a pointer to
rectangular
the array becomes an owner of that object and has a pointer to it.

7. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
@interface ClassName:SuperClassName
is called every time the event occurs
UIView
cannot be added to an array

8. Use of class methods - there are three...
instance variable of an object is valid
ready-made instances - instantiation from scratch - and nib based instantiation
draw images
alloc - singleton - informational utility method?

9. NSNumber - class...
values
Instantiation from scratch
Object wrapper around primitive types like int - float - double - BOOl
size and position

10. Number one use of protocols in iOS...
methods for generating an instance
@synthesize
delegates and dataSources
creating an initializer

11. 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...
message
alloc - singleton - informational utility method?
setPossessionName
causes the program to immediately exit from the loop it is executing - whether its for - while or do

12. Any individual object belonging to any class...
position
lowercase - uppercase
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
is an instance of that class

13. A view is a subclass of _
parentViewController
'getters' and 'setters'
UIView
has one root view controller

14. UIViewController has several methods that get called at certain times...
data source - view controller and delegate
Anytime you call a method with new - alloc or copy. You own and must release that object.
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
values

15. Hold data and know nothing about the user interface
accessors - individually we call them 'getters' and 'setters'
alloc - singleton - informational utility method?
Model Objects[Factory Worker]
Controller Objects[Managers]

16. UIView - designated initializer...
implementation
a mechanism to enable specific callbacks
(id)initWithFrame:(CGRect)aRect;
setPossessionName

17. Center and frame are used to _ your view
values
NSLog routine
pointer to an object
position

18. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
Controller Objects[Managers]
view
object
'getters' and 'setters'

19. Property List...
collection of collections - NSArray of an NSArray
you always return the newly initialized object(return self)
instance of UIView or one of its subclasses
methods

20. In a class method you cannot access...
the instance variables
CGRect
in the dealloc - or when a Controller's view is 'unloaded'
'getters' and 'setters'

21. An instance is a device for maintaining state. It's a box for _ of data.
type - name and value
storage
@synthesize
Object wrapper around primitive types like int - float - double - BOOl

22. A view is an...
an object's property
class methods - initializers
instance of UIView or one of its subclasses
UIViewController

23. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
Instantiation from scratch
they need to be defined in the implementation file
@synthesize
group of global functions already assigned to this class

24. When an object is removed from an NSMutableArray - that object is sent the message release;...
values
arguments[message]
retain
the array relinquishes ownership of that object and no longer has a pointer to it

25. A pointer to the object being asked to execute a method
receiver[message]
nil
they need to be defined in the implementation file
creating an initializer

26. All objects are accessed using...
collection of collections - NSArray of an NSArray
pointers
ordered collection of objects - immutable
view controller

27. Why properties?
declaration and initialization of a variable
instance variable of an object is valid
super - self
safety - subclassability and makes code look more consistent with C structs

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

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29. Asking a class or object to execute a method
CGRect
message
methods
causes the program to immediately exit from the loop it is executing - whether its for - while or do

30. For view controllers that are closely related - like a table view controller and its detail view controller - you can simply give them _ that point to each other.
lowercase - uppercase
instance variables
%d
type - name and value

31. If you aren't going to initialize an instance reference pointer at the moment you declare it by assigning a real value - it's a good idea to assign it _.
nil
instance variables
data
parentViewController

32. Ready-made instances...
dealloc - is called on the object & the object's memory is returned to the heap
calling code that does the instantiation for you
delegates and dataSources
subview(s)

33. Only exists within the statement block there defined - outside of the block is fine
variable scope - if defined within a block
@synthesize
initializers
its dataSource

34. [Instance Variables] The code it gets from its class and in a sense is shared with all other instances of that class - but the _ belong to it alone.
references to objects
data
Generic object wrapper for other non-object data types
a mechanism to enable specific callbacks

35. If the view has no subviews - create it programmatically; if it has subviews
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
position
Maintenance of state
create a XIB file

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

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37. Class methods typically either create
first responder
new instances of the class or retrieve some global property of the class.
message
values

38. In Objective C arrays can hold only...
Is a placeholder object
references to objects
position
initializer

39. A callback is a function that is supplied in advance of an event - and...
delegates and dataSources
receiver
the message release to all its entries
is called every time the event occurs

40. Designated initializer makes sure that every...
has one root view controller
size and position
instance variable of an object is valid
Instantiation from scratch

41. 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
Maintenance of state
Functions
array[class - NSMutableArray]
Abstraction

42. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
view controller's initialization method
NSCoder
Object wrapper around primitive types like int - float - double - BOOl
instance

43. NSDictionary...
Hash table - Look up objects using a key to get a value.
Continue
initializers
in the dealloc - or when a Controller's view is 'unloaded'

44. A command directed to an object is called an...
header files declare
message
references to objects
(id)initWithFrame:(CGRect)aRect;

45. In general - class methods tend to be factory methods - that is...
copy - retain
Abstraction
instance
methods for generating an instance

46. The class is responsible for what instance variables the instance has - but not the _ of those variables.
values
%d
You take ownership for an object you want to keep a pointer to
type - name and value

47. Execution of the break statement...
NSLog routine
the array becomes an owner of that object and has a pointer to it.
causes the program to immediately exit from the loop it is executing - whether its for - while or do
for inheritance - adopting the superclasses implementation

48. A message is always contained in square brackets - and has three parts
class's
Anytime you call a method with new - alloc or copy. You own and must release that object.
receiver - selector - arguments
is called every time the event occurs

49. super - is used...
Data Encapsulation
instance
for inheritance - adopting the superclasses implementation
do so in viewDidLoad

50. Files Owner...
subview(s)
Is a placeholder object
will be ignored
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

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iOS 5 App Development Objective C

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