Swiftys

swift-hepers.swift

// custom RegEx Class
// let string: String = "foo bar baz"
// let regex: Regex = "foo"

// regex.match(string) // true

// "foo".match(string) // true

// "foo bar baz" =~ "foo" // true


struct Regex {
    let pattern: String
    let options: NSRegularExpressionOptions!

    private var matcher: NSRegularExpression {
        return NSRegularExpression(pattern: self.pattern, options: self.options, error: nil)
    }

    init(pattern: String, options: NSRegularExpressionOptions = nil) {
        self.pattern = pattern
        self.options = options
    }

    func match(string: String, options: NSMatchingOptions = nil) -> Bool {
        return self.matcher.numberOfMatchesInString(string, options: options, range: NSMakeRange(0, string.utf16Count)) != 0
    }
}

extension Regex: StringLiteralConvertible {
    typealias ExtendedGraphemeClusterLiteralType = StringLiteralType

    init(unicodeScalarLiteral value: UnicodeScalarLiteralType) {
        self.pattern = "\(value)"
    }

    init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterLiteralType) {
        self.pattern = value
    }

    init(stringLiteral value: StringLiteralType) {
        self.pattern = value
    }
}

// convert a hex color to a proper UIColor
// someUIControler.backgroundColor = hexColor("#22CD7E")

func hexColor (hex:String) -> UIColor {
    var cString:String = hex.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet() as NSCharacterSet).uppercaseString
    
    if (cString.hasPrefix("#")) {
        cString = cString.substringFromIndex(advance(cString.startIndex, 1))
    }
    
    if (count(cString) != 6) {
        return UIColor.grayColor()
    }
    
    var rgbValue:UInt32 = 0
    NSScanner(string: cString).scanHexInt(&rgbValue)
    
    return UIColor(
        red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
        green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
        blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
        alpha: CGFloat(1.0)
    )
}

tableView.separatorStyle = UITableViewCellSeparatorStyle.None



// customize the line below table cells
var cell = self.tableView.dequeueReusableCellWithIdentifier("tweet", forIndexPath: indexPath) as! UITableViewCell

(cell.contentView.viewWithTag(10) as! UIImageView).image = UIImage(named: "loader.gif")
(cell.contentView.viewWithTag(9) as! UILabel).text = ""
var lineView = UIView(frame: CGRectMake(0, cell.contentView.frame.size.height - 1.0, cell.contentView.frame.size.width, 1))
lineView.backgroundColor = hexColor("#222222")
cell.contentView.addSubview(lineView)


// bring a button above other views
self.view.bringSubviewToFront(self.someUIButton)


// user takes a screenshot

let mainQueue = NSOperationQueue.mainQueue()
NSNotificationCenter.defaultCenter().addObserverForName(UIApplicationUserDidTakeScreenshotNotification,
    object: nil,
    queue: mainQueue) { notification in
        println("user took a screenshot")
}