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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. In Objective C arrays can hold only...
group of global functions already assigned to this class
Continue
references to objects
receiver - selector - arguments

2. In general - class methods tend to be factory methods - that is...
group of global functions already assigned to this class
methods for generating an instance
storage
'getters' and 'setters'

3. initWithFrame: the designated initializer for UIView gives the view
its dataSource
ready-made instances - instantiation from scratch - and nib based instantiation
size and position
class

4. When overriding a method - all you need to is _ - you do not need to declare it in the header file because it has already been declared by the superclass....
Functions
parentViewController
Controller Objects[Managers]
define it in the implemenation file

5. In the last line of an init method...
Anytime you call a method with new - alloc or copy. You own and must release that object.
callbacks
you always return the newly initialized object(return self)
NSBundle

6. When an object is removed from an NSMutableArray - that object is sent the message release;...
the array relinquishes ownership of that object and no longer has a pointer to it
CGRect bounds - GCPoint center - CGRect frame
Anytime you call a method with new - alloc or copy. You own and must release that object.
a mechanism to enable specific callbacks

7. A UITableViewController can fill all three roles of...
data source - view controller and delegate
arguments[message]
you always return the newly initialized object(return self)
receiver[message]

8. Object Oriented based analogue to a function is called a...
will be ignored
draw images
lowercase - uppercase
method

9. NSSet...
Hash table - Look up objects using a key to get a value.
Continue
unordered collection of objects - objects must be unique
rectangular

10. NSDate - class...
Used to find the time right now or to store past or future time/dates
pointers
Ready-Made Instance
data

11. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
CGRect
viewWillDissapear: and viewWillAppear:
reuse your cells
instance of UIView or one of its subclasses

12. Any individual object belonging to any class...
reuse your cells
variable scope - if defined within a block
is an instance of that class
'getters' and 'setters'

13. Typically the designated initializer has parameters for the most important and frequently used _ of an object
receiver[message]
declaration and initialization of a variable
instance variables
self

14. Ready-made instances...
you always return the newly initialized object(return self)
calling code that does the instantiation for you
values
a single-array can contain objects of different types

15. Defining variables - three parts...
class methods - initializers
type - name and value
receiver[message]
a mechanism to enable specific callbacks

16. A message is always contained in square brackets - and has three parts
arguments[message]
class's
receiver - selector - arguments
view controller's initialization method

17. In Cocoa Touch - the table view asks another object _ what it should display...
callbacks
(id)initWithFrame:(CGRect)aRect;
type - name and value
its dataSource

18. Just a floating point number - but we always use it for graphics.
Object wrapper around primitive types like int - float - double - BOOl
CGFloat
view
ready-made instances - instantiation from scratch - and nib based instantiation

19. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
superclass's
You take ownership for an object you want to keep a pointer to
header files declare
for inheritance - adopting the superclasses implementation

20. Origin of a view's coordinate system is _ left
an object's property
initializers
(id)initWithFrame:(CGRect)aRect;
upper

21. Delegation is an object oriented approach to
NSCoder
selector[message]
callbacks
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

22. The only reason to temporarily own an object - is...
the array relinquishes ownership of that object and no longer has a pointer to it
storage
to give it someone else - or another object
CF - Ref

23. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
view controller's initialization method
lowercase - uppercase
superclass's
instance variable of an object is valid

24. Whenever a UINavigationController is about to swap views - it sends out two messages
instance variables
viewWillDissapear: and viewWillAppear:
safety - subclassability and makes code look more consistent with C structs
method

25. A view exists within a hierarchy. The window (an instance of UIWindow) is a view and the root of the hierarchy. It has _ (that appear on the window). Those views can also have _.
subview(s)
object
Ready-Made Instance
nil

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

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27. NSString *s = @'Hello - World'; is an example of...
pointers
viewWillDissapear: and viewWillAppear:
declaration and initialization of a variable
(id)initWithFrame:(CGRect)aRect;

28. id is a...
alloc - singleton - informational utility method?
pointer to an object
rectangular
instance variable of an object is valid

29. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
@interface ClassName:SuperClassName
class
only the class and subclasses can access

30. class methods...
callbacks
group of global functions already assigned to this class
a mechanism to enable specific callbacks
draw images

31. Class methods do not operate on an _ or have any access to _ variables....
values
viewWillDissapear: and viewWillAppear:
instance
a mechanism to enable specific callbacks

32. Classes describe two things...
attributes - behavior
ordered collection of objects - immutable
Object wrapper around primitive types like int - float - double - BOOl
protocol

33. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
pointers
group of global functions already assigned to this class
unordered collection of objects - objects must be unique
Controller Objects[Managers]

34. Dynamic binding means that when we call a certain object's method - and there are several _ of that method - the right one is figured out at runtime.
view controller's initialization method
position
implementation
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

35. Class methods typically either create
CGFloat
selector[message]
ordered collection of objects - immutable
new instances of the class or retrieve some global property of the class.

36. Prefixing a character string with an @ symbol [specific - NSString class]...
its dataSource
creates an instance of NSString that holds the character string
Object wrapper around primitive types like int - float - double - BOOl
size and position

37. UITableViewController is a subclass of...
for inheritance - adopting the superclasses implementation
NSBundle
setPossessionName
UIViewController

38. 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...
setPossessionName
group of global functions already assigned to this class
header files declare
array[class - NSMutableArray]

39. 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.
delegates and dataSources
methods for generating an instance
instance variables
a single-array can contain objects of different types

40. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
do so in viewDidLoad
class methods - initializers
retain
C Functionn

41. UIView - designated initializer...
an object's property
attributes - behavior
(id)initWithFrame:(CGRect)aRect;
protocol

42. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
self
calling code that does the instantiation for you
receiver
Used to find the time right now or to store past or future time/dates

43. Also if you send the NSObject the _ message - you own that object.
to give it someone else - or another object
retain
rectangular
pointer - class

44. Name of the method to be executed
instance
nil
selector[message]
lowercase - uppercase

45. Values to be supplied as the parameters to the method
CGFloat
ordered collection of objects - immutable
storage
arguments[message]

46. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
to give it someone else - or another object
size and position
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
initializers

47. An instance is a device for maintaining state. It's a box for _ of data.
storage
instance variables
Used to find the time right now or to store past or future time/dates
Data Encapsulation

48. @property - is using methods...
in the dealloc - or when a Controller's view is 'unloaded'
to get and set variables
initializer
to give it someone else - or another object

49. Proceed through the loop - jump back to the top and check again
upper
Continue
instance variables
implementation

50. Instance Variables by default are called @protected meaning...
only the class and subclasses can access
to give it someone else - or another object
You take ownership for an object you want to keep a pointer to
do so in viewDidLoad

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iOS 5 App Development Objective C

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