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iOS: Building a simple iPhone app


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What is the purpose of synthesizing your property?
Synthesizing helps create getter and setter methods for
NO
Boolean for 'false' in Objective-C
What is a pseudo-random number?
A number generated using a mathematical formula
nonatomic
Attribute that informs Xcode not to worry about different parts of the application using a property at the same time
What is an imageview?
A container for displaying an image.
False
The ordering of the views and controls in the view hierarchy are determined by their size.
true
True or false: Beginning with iOS4, applications no longer terminate when the user presses the Home button
What is an image view?
It's a container to display an image.
UIView
A view is created from a class known as UIView
subviews
views underneath a view.
UIImage
create them from a variety of sources such as (Internet, File System within your app)
Main view
The main view is a property of view view controller
command+~
How to go back to the code editor command+~
the button
button: background image
cropped.
button: image
Highlighted
Highlighted is a button state
Normal
Normal is a button state
Disabled
Disabled is a button state
Image and background
Image and background are the two properties of a button to display an image
retina display
A retina display requires a higher resolution image than a regular one
retina display,
How do we get images to look great on retina? We need to add images that are twice the size.
640 X 960 pixels.
What is double the display of an iphone? 640 X 960 pixels.
Two
How many times larger is an image for an iPhone Retina display than the standard iPhone display?
@2x
File name suffix indicating an image is suitable for retina display
The standard image appears
What happens if you don't provide larger image for a Retina Display iPhone?
88
If a standard image is sized 44 x 44 px then how big do you need to make that image for an iPhone 4 / 4S?
UIResponder
Which parent class contains the methods that respond to motion events?
Accelerometer and Gyroscope
Which two sensors detect motion events?
Create a method in the same class which
What can you do when the same lines of code are repeated several times?
touchesMoved:withEvent:
Which method can be used to detect finger movement along the screen?
touchesEnded:withEvent:
Which is the only method you need when detecting a simple tap?
nonatomic
the details. This is the more 'relaxed' , less 'powerful' setting of two possibilities
True
True or False - Every C program must have a main function.