How to check if a String is an Int in Swift?

Question

I have a TextField which I want to verify if the inputted text is an integer. How could I do this?

I want to write a function like this:

func isStringAnInt(string: String) -> Bool {  } 

Answer 1

String Extension & Computed Property

You can also add to String a computed property.

The logic inside the computed property is the same described by OOPer

extension String {     var isInt: Bool {         return Int(self) != nil     } } 

Now you can

"1".isInt // true "Hello world".isInt // false "".isInt // false 

Answer 2

Use this function

func isStringAnInt(string: String) -> Bool {     return Int(string) != nil }