Swift Boolean Literals (Obj-C @YES @NO equivalent)

Question

In Objective-C, you can type @YES instead of [NSNumber numberWithBOOL:YES]. This makes for much tidier code.

In Swift, I'm having to write NSNumber.numberWithBool(true), which is kind of ugly.

Is there an equivalent to @YES and @NO in Swift?

Thanks in advance for your help!

Answer 1

it is true and false

xcrun swift
Welcome to Swift!  Type :help for assistance.
  1> import Foundation
  2> var t : NSNumber = true
t: __NSCFBoolean = {}
  3> var f : NSObject = false
f: __NSCFBoolean = {}
  4>

read this: https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/WorkingWithCocoaDataTypes.html#//apple_ref/doc/uid/TP40014216-CH6-XID_43

Swift automatically bridges certain native number types, such as Int and Float, to NSNumber. This bridging lets you create an NSNumber from one of these types

All of the following types are automatically bridged to NSNumber:

• Int
• UInt
• Float
• Double
• Bool

Answer 2

Swift automatically bridges certain native number types, such as Int and Float, to NSNumber

"Using Swift with Cocoa and Objective-C" (iBook).

let foo : NSNumber = true
let bar = NSNumber(value: false)