swift的Regex(NSRegularExpression)

標籤：ios   Regex   swift   

swift的Regex(NSRegularExpression)by 伍雪穎
import UIKit

class ViewController:UIViewController {

    overridefunc viewDidLoad() {
        super.viewDidLoad()
        let mailPattern =
        "^([a-z0-9_\\.-]+)@([\\da-z\\.-]+)\\.([a-z\\.]{2,6})$"
        let matcher =RegexHelper(mailPattern)
        let maybeMailAddress ="[email protected]"
        if matcher.match(maybeMailAddress) {
            println("valid email")
        }
    }
   
    struct RegexHelper {
        let regex:NSRegularExpression?
        init(_ pattern: String) {
            var error:NSError?
            regex =NSRegularExpression(
                pattern: pattern,
                options: .CaseInsensitive,
                error: &error)
        }
       
        func match(input:String) ->Bool {
            iflet matches =regex?.matchesInString(input,
                options: nil,
                range: NSMakeRange(0,count(input))) {
                return matches.count > 0
            } else {
                returnfalse
            }
        }
    }}

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swift的Regex(NSRegularExpression)