Does swift have a trim method on String?

Question

Does swift have a trim method on String? For example:

let result = " abc ".trim() // result == "abc" 

Answer 1

Here's how you remove all the whitespace from the beginning and end of a String.

(Example tested with Swift 2.0.)

let myString = "  \t\t  Let's trim all the whitespace  \n \t  \n  " let trimmedString = myString.stringByTrimmingCharactersInSet(     NSCharacterSet.whitespaceAndNewlineCharacterSet() ) // Returns "Let's trim all the whitespace" 

(Example tested with Swift 3+.)

let myString = "  \t\t  Let's trim all the whitespace  \n \t  \n  " let trimmedString = myString.trimmingCharacters(in: .whitespacesAndNewlines) // Returns "Let's trim all the whitespace" 

Answer 2

Put this code on a file on your project, something likes Utils.swift:

extension String {        func trim() -> String     {         return self.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())     } } 

So you will be able to do this:

let result = " abc ".trim() // result == "abc" 

Swift 3.0 Solution

extension String {        func trim() -> String    {     return self.trimmingCharacters(in: NSCharacterSet.whitespaces)    } } 

So you will be able to do this:

let result = " Hello World ".trim() // result = "HelloWorld"