CODEWITHSUNDEEP
regexswift
user2413621
user2413621

Reputation: 2946

How to extract all email address from text in swift

I have a text

var txt = "[email protected] heyyyyy cool [email protected]"

I want to extract the email address from the text and store it in an array. I want to do it with regular expression. I found the regular expression, but i am not able to save the email in to an array.

i tried 

let regEx = "/(\\+[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.[a-zA-Z0-9._-]+)/gi"
if let email = NSPredicate(format: "SELF MATCHES %@", regEx) {
        //what to do here
}

Or am i doing wrong? I know this is a basic question. Please help

Thanks in advance.

Upvotes: 2

Views: 3217

Answers (5)

taynguyen
taynguyen

Reputation: 3621

These code worked for me. You can checkout email regex from here.

SWIFT 5

func extractEmailAddrIn(text: String) -> [String] {
    var results = [String]()

    let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
    let nsText = text as NSString
    do {
        let regExp = try NSRegularExpression(pattern: emailRegex, options: .caseInsensitive)
        let range = NSMakeRange(0, text.count)
        let matches = regExp.matches(in: text, options: .reportProgress, range: range)

        for match in matches {
            let matchRange = match.range
            results.append(nsText.substring(with: matchRange))
        }
    } catch (let error) {
        print(error)
    }

    return results
}

SWIFT 3

func extractEmailAddrIn(text: String) -> [String] {
    var results = [String]()
    
    let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
    let nsText = text as NSString
    do {
        let regExp = try NSRegularExpression(pattern: emailRegex, options: NSRegularExpressionOptions.CaseInsensitive)
        let range = NSMakeRange(0, text.characters.count)
        let matches = regExp.matchesInString(text, options: .ReportProgress, range: range)
        
        for match in matches {
            let matchRange = match.range
            results.append(nsText.substringWithRange(matchRange))
        }
        
    } catch _ { 
    }
    
    return results
}

Upvotes: 6

Muhammad Adil
Muhammad Adil

Reputation: 4668

Here is the String extensions I have created to extract emails from It works well in swift 4.

 extension String {    
  func getEmails() -> [String] {
    if let regex = try? NSRegularExpression(pattern: "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,6}", options: .caseInsensitive)
    {
        let string = self as NSString
        
        return regex.matches(in: self, options: [], range: NSRange(location: 0, length: string.length)).map {
            string.substring(with: $0.range).lowercased()
        }
    }
    return []
  }
}

Usage

let test = "Precision Construction John Smith cONSTRUCTION WORKER 123 Main St, Ste. 30o 
www.precsioncontructien.com [email protected] [email protected] [email protected] 555.555.5SS5"
            let emails = test.getEmails()
 print(emails)

// results ["[email protected]", "[email protected]", "[email protected]"]

Upvotes: 0

Andrej1A
Andrej1A

Reputation: 71

Do you need the plus sign in the mail address?

Without + sign in the address:

([a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.[a-zA-Z0-9._-]+)

Result: ["[email protected]", "[email protected]"]

With + sign in the address:

([\\+a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.[a-zA-Z0-9._-]+)

Result: ["[email protected]", "[email protected]"]

Upvotes: 0

sbooth
sbooth

Reputation: 16976

I recommend using the NSRegularExpression class instead of NSPredicate. The format for the regular expressions is from the ICU.

Here is one way to do it:

let pattern = "(\\+[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\\.[a-zA-Z0-9._-]+)"
let regexp = NSRegularExpression(pattern: pattern, options: NSRegularExpressionOptions.CaseInsensitive, error: nil)

let str = "[email protected] heyyyyy cool [email protected]" as NSString

var results = [String]()
regexp?.enumerateMatchesInString(str, options: NSMatchingOptions(0), range: NSRange(location: 0, length: str.length), usingBlock: { (result: NSTextCheckingResult!, _, _) in
    results.append(str.substringWithRange(result.range))
})

// Gives [[email protected], [email protected]]

Upvotes: 3

Jonathan Mee
Jonathan Mee

Reputation: 38919

Looks like your regex name is wrong. You declare it as regEx but in your NSPredicate you use emailRegEx.

Upvotes: 0

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