What Is Nsarray

An object representing a static ordered collection, for use instead of an Array constant in cases that require reference semantics. Language. SwiftObjective-C.

What is difference between array and NSArray?

4 Answers. Array is a struct, therefore it is a value type in Swift. NSArray is an immutable Objective C class, therefore it is a reference type in Swift and it is bridged to Array<AnyObject> . NSMutableArray is the mutable subclass of NSArray .

What is NSDictionary?

The NSDictionary class declares the programmatic interface to objects that manage immutable associations of keys and values. … Each entry consists of one object that represents the key and a second object that is that key’s value. Within a dictionary, the keys are unique.