String to NSNumber in Swift
Swift 3.0
NSNumber(integer:myInteger) has changed to NSNumber(value:myInteger)
let someString = "42222222222"if let myInteger = Int(someString) { let myNumber = NSNumber(value:myInteger)}Swift 2.0
Use the Int() initialiser like this.
let someString = "42222222222"if let myInteger = Int(someString) { let myNumber = NSNumber(integer:myInteger) print(myNumber)} else { print("'\(someString)' did not convert to an Int")}This can be done in one line if you already know the string will convert perfectly or you just don't care.
let myNumber = Int("42222222222")!Swift 1.0
Use the toInt() method.
let someString = "42222222222"if let myInteger = someString.toInt() { let myNumber = NSNumber(integer:myInteger) println(myNumber)} else { println("'\(someString)' did not convert to an Int")}