iOS Swift. How to trim whitespace in a string

In Swift we can trim from string all symbols that we want. If we want to remove white spaces and new lines, we need to use following:

let str = "  Hello World  "
let trimmed = str.trimmingCharacters(in: .whitespacesAndNewlines)

This string will be trimmed to "Hello World"

For more handy using we can write extension for String class

import Foundation
import UIKit

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

And here we use this extension

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