What Is
Cocoa Touch?
The Cocoa Touch is an UI (user interface) framework that runs on
iOS for the iPhone, iPod Touch, and iPad, watchOS for the Apple Watch and tvOS
for the Apple TV and so on.
The Cocoa Touch helps us to create rich user experiences by
allowing for the smooth movement of visual elements and iOS, watchOS, and tvOS
technologies can be seen as a set of layers, with Cocoa Touch at the highest
level and the Core OS/kernel at the bottom.
Some of the main features of Cocoa Touch are -
1. UI State
Preservation
2. Notifications
Service
3. Auto
Layout
4. Document
Picker
5. Multitasking
6. TextKit
7. AirDrop
8. AirDrop
9. And so
on
The Cocoa Touch also provides an abstraction layer of iOS.
The Cocoa is a object oriented software libraries, application
environment and a runtime system that helps us to develop OSX and iOS apps
using Swift language and Objective C.
What are
Cocoa Touch key frameworks for developing applications?
Cocoa touch has some frameworks and it looks like-
1. App Kit
framework
2. Core
data framework
3. Foundation
framework
4. PushKit
Framework
5. Twitter
Framework
6. EventKit
UI Framework
7. Message
UI Framework
8. and so
on
What are
the differences between cocoa touch and cocoa?
Cocoas touch is an application framework for Apple products like
iPad, iPhone and iPod Touch.
Cocoa is an application framework that helps in the development of
applications in MAC OS X environment.
Both Cocoa and Cocoa Touch sit on top of other collections of
frameworks to create the API stacks.
For Application Framework -
1. Cocoa is
the application framework for Mac OS X.
2. Cocoa
Touch is the application framework for iPhone and iPod Touch.
For Frameworks -
1. Cocoa - Foundation
and AppKit
2. Cocoa
Touch - Foundation and UIKit
For API -
1. Cocoa -
All the classes used in Cocoa have the NS prefix Exp: NSTextField
2. Cocoa
Touch - classes used in Cocoa have the UI prefix Exp: UITextField
For MVC patterns -
1. Cocoa -
Cocoa has multiple alternative design patterns – in addition to MVC
2. Cocoa
Touch - The iPhone SDK has a reinforced MVC system, which performs better than
the default MVC in Cocoa
What
does cocoa touch offers?
Cocoa touch supports event-driven behavior that helps in managing
applications, windows, and workspaces.
Cocoa has a user interface objects like windows, buttons, tables,
etc. These features can drag and dropped from interface builder and its code
created automatically.
Cocoa supports the following -
1. Drawing
and imaging
2. lazy
loading
3. multithreading
4. Handles
undo and redo management
5. Internationalization
6. content
formatting and pagination
7. Data
exchange using Copy Paste and Drag Drop
8. Audio
and Video using QuickTime framework
What is
the meaning of core data?
Core data is a framework that helps to managing graphs and
persistent storage.
What are
the performance tools available for cocoa application development?
1. Big top
2. Malloc
debug
3. Quartz
debug
4. Shark
5. Instruments
What Is
Xcode?
XCode is the engine that powers Apple’s IDE (integrated development
environment) for OSX and iOS.
What are
the important classes in cocoa?
There are many more classes are available -
1. NSDate
2. NSNumber
3. NSArray
4. NSNumber
5. NSXMLParser
What
Frameworks those make Cocoa?
1. Foundation
2. Appkit
(Application Kit)
What are
the differences between Copy and mutableCopy?
1. Copy
always creates an immutable copy.
2. Mutable
Copy always creates a mutable copy.
What are
the differences between alloc and new?
The alloc creates a new
memory location but doesn’t initialize it as compared to new.
Which one
is thread-safe-atomic or non-atomic?
Immutable objects are generally thread-safe for example, NSString
What are
the differences between release and pool drain?
The release frees a
memory. The drain releases the
NSAutoreleasePool itself.
What are
the differences between @property and @synthesize?
The @property - declares a property.
The @synthesize - creates getter and setter methods for a property
For Example, @property float value;
What are
the Relation between iVar and @property?
The iVar are just
instance variables. It can't be accessed unless we create assessors, which are
generated by @property.
The iVar and its
counterpart @property can be of
different
What’s
the NSCoder class used for?
The NSCoder is an abstract class which represents 
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Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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