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

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

So you will be able to do this:

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

In Swift 3.0

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

And you can call

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

Swift 5 & 4.2

let trimmedString = " abc ".trimmingCharacters(in: .whitespaces) //trimmedString == "abc" 

Swift 3

let result = " abc ".trimmingCharacters(in: .whitespacesAndNewlines) 

Yes it has, you can do it like this:

var str = " this is the answer " str = str.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines) print(srt) // "this is the answer" 

CharacterSet is actually a really powerful tool to create a trim rule with much more flexibility than a pre defined set like .whitespacesAndNewlines has.

For Example:

var str = " Hello World !" let cs = CharacterSet.init(charactersIn: " !") str = str.trimmingCharacters(in: cs) print(str) // "Hello World" 

//Swift 4.0 Remove spaces and new lines

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

extension String { /// EZSE: Trims white space and new line characters public mutating func trim() { self = self.trimmed() } /// EZSE: Trims white space and new line characters, returns a new string public func trimmed() -> String { return self.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet()) } } 

Taken from this repo of mine: https://github.com/goktugyil/EZSwiftExtensions/commit/609fce34a41f98733f97dfd7b4c23b5d16416206

In Swift3 XCode 8 Final

Notice that the CharacterSet.whitespaces is not a function anymore!

(Neither is NSCharacterSet.whitespaces)

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

Another similar way:

extension String { var trimmed:String { return self.trimmingCharacters(in: CharacterSet.whitespaces) } } 

Use:

let trimmedString = "myString ".trimmed 

Truncate String to Specific Length

If you have entered block of sentence/text and you want to save only specified length out of it text. Add the following extension to Class

extension String { func trunc(_ length: Int) -> String { if self.characters.count > length { return self.substring(to: self.characters.index(self.startIndex, offsetBy: length)) } else { return self } } func trim() -> String{ return self.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines) } } 

Use

var str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry." //str is length 74 print(str) //O/P: Lorem Ipsum is simply dummy text of the printing and typesetting industry. str = str.trunc(40) print(str) //O/P: Lorem Ipsum is simply dummy text of the 

You can use the trim() method in a Swift String extension I wrote https://bit.ly/JString.

var string = "hello " var trimmed = string.trim() println(trimmed)// "hello" 

You can also send characters that you want to be trimed

extension String { func trim() -> String { return self.trimmingCharacters(in: .whitespacesAndNewlines) } func trim(characterSet:CharacterSet) -> String { return self.trimmingCharacters(in: characterSet) } } validationMessage = validationMessage.trim(characterSet: CharacterSet(charactersIn: ",")) 

I created this function that allows to enter a string and returns a list of string trimmed by any character

 func Trim(input:String, character:Character)-> [String] { var collection:[String] = [String]() var index = 0 var copy = input let iterable = input var trim = input.startIndex.advancedBy(index) for i in iterable.characters { if (i == character) { trim = input.startIndex.advancedBy(index) // apennding to the list collection.append(copy.substringToIndex(trim)) //cut the input index += 1 trim = input.startIndex.advancedBy(index) copy = copy.substringFromIndex(trim) index = 0 } else { index += 1 } } collection.append(copy) return collection } 

as didn't found a way to do this in swift (compiles and work perfectly in swift 2.0)

Don't forget to import Foundation or UIKit.

import Foundation let trimmedString = " aaa "".trimmingCharacters(in: .whitespaces) print(trimmedString) 

Result:

"aaa" 

Otherwise you'll get:

error: value of type 'String' has no member 'trimmingCharacters' return self.trimmingCharacters(in: .whitespaces) 

**Swift 5** extension String { func trimAllSpace() -> String { return components(separatedBy: .whitespacesAndNewlines).joined() } func trimSpace() -> String { return self.trimmingCharacters(in: .whitespacesAndNewlines) } } **Use:** let result = " abc ".trimAllSpace() // result == "abc" let ex = " abc cd ".trimSpace() // ex == "abc cd"