Is NSNumber integer?
NSNumber is “toll-free bridged” with its Core Foundation counterparts: CFNumber for integer and floating point values, and CFBoolean for Boolean values. See Toll-Free Bridging for more information on toll-free bridging.
How do I assign an INT to NSNumber?
I use [NSNumber numberWithInt:42] or @(42) to convert an int to NSNumber before adding it to an NSDictionary: int intValue = 42; NSNumber *numberValue = [NSNumber numberWithInt:intValue]; NSDictionary *dict = @{ @”integer” : numberValue };
How do I add NSNumber?
You need to do this: NSNumber *eight = [NSNumber numberWithInt:([five intValue] + [three intValue])]; If you can, avoid using NSNumber for numeric operations (such as addition) and use int values instead. Just create a NSNumber when you finally need it (i.e. to use it in a cocoa library call).
What is NSInteger in Swift?
NSInteger is a type definition that describes an integer – but it is NOT equivalent to int on 64-bit platforms. You can examine the typedef by cmd-clicking on NSInteger in Xcode. It has methods to convert between different types and methods to retrieve a string representation of your numeric value.
Is NSInteger primitive?
5 Answers. NSNumber is a class, not a primitive, and is used when you need to put raw numbers into dictionaries, arrays, or otherwise encapsulate them. NSInteger , NSUInteger , CGFloat , etc are simple types and correspond (on 32-bt systems like the iPhone) to int , unsigned int and float .
What is Nsobject in Swift?
The root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects. Language. SwiftObjective-C.
What is Customstringconvertible?
A type with a customized textual representation.
What does an Objective C string literal look like?
A string literal is a expression like @”” . The compiler will replace this with an instance of NSString . A string constant is a read-only pointer to NSString .
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 NSInteger in Objective C?
NSInteger is a type definition that describes an integer – but it is NOT equivalent to int on 64-bit platforms. You can examine the typedef by cmd-clicking on NSInteger in Xcode. NSNumber is a class that helps you to store numeric types as object.