2.What is the Advantage of using programmatic UIView?
Programmatically constructing UIView's can be verbose and tedious,
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3. What are all the newly added frameworks to iOS 8.0?
7.Metal 8.Touch ID API
9.PhotoKit 10.Camera API
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4.What are the (.h) and (.m) files?
.h (header files) contain class, type, function, and constant declarations. So no actual code. Header files are there to let (for instance) xcode know what methods and properties are declared in that specific class.
.m (Class implementation file) is contains all the implementation details of all the functions declared in .h. It also contains declaration and implementation of private functions that outside classes cannot use, or should not care about.
What is the difference between IBOutlet and IBAction in iOS ?
Some important points About View Controller.
5.How to synthesize CGFloat in objective C?
In general, you no longer need to manually write @synthesize anymore.
In your example, if you write
@property (assign, nonatomic) CGFloat someFloat;
The compiler will automatically synthesize it for you, which would be equivalent to you writing:
@synthesize someFloat = _someFloat;
Hence, you would be able to access the property through self.someFloat or access the ivar within the implementation file by using _someFloat.
If, however, you manually synthesize it like
What are the differences between Cocoa and Cocoa Touch?
Some important notes about View in iPhone.
6. What are the location services?
Applications such as Maps, camera and compass are allowed to use the information from cellular, Wi-Fi and Global Positioning System networks for determining the approximate locations.
The location is displayed on the screen, using a blue marker.
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