What is ObjC?
Objective-C (ObjC) is a programming language that is used in the OS X and iOS operating systems and their application programming interfaces (APIs). Objective-C is object oriented, general purpose and adds to new language features in the C programming language.
What is Nsdictionary?
An object representing a static collection of key-value pairs, for use instead of a Dictionary constant in cases that require reference semantics.
What is made up of NSError object?
The core attributes of an NSError object are an error domain (represented by a string), a domain-specific error code and a user info dictionary containing application specific information.
What are the features of Objective-C?
Some Nice Features of the Objective-C Language
- Classes are objects. Each class is an instance of a meta-class automatically created and managed by the run-time.
- Dynamic typing.
- Optional static typing.
- Categories.
- Message sending.
- Expressive message syntax.
- Introspection.
- Dynamic run-time.
How the Objective-C is working and can u brief the working of structure of objective?
Objective-C arrays allow you to define type of variables that can hold several data items of the same kind but structure is another user-defined data type available in Objective-C programming which allows you to combine data items of different kinds.
What is delegate in Objective-C?
An Objective-C delegate is an object that has been assigned to the delegate property another object. To create one, you define a class that implements the delegate methods you’re interested in, and mark that class as implementing the delegate protocol.
What does @() mean in Objective-C?
It’s Shorthand writing. In Objective-C, any character , numeric or boolean literal prefixed with the ‘@’ character will evaluate to a pointer to an NSNumber object (In this case), initialized with that value. C’s type suffixes may be used to control the size of numeric literals.
What does @objc mean in Swift?
@objc means you want your Swift code (class, method, property, etc.) to be visible from Objective-C. dynamic means you want to use Objective-C dynamic dispatch.