UITextView highlight all matches using swift

Question

I want to highlight all matches word with searching. I wrote code but I couldn\'t use a loop. When i search a word, my app find words and highlight only first word. here is

Answer 1

Solved.

this is new :

var count = 0
let attributedText = NSMutableAttributedString(attributedString: txtMetin2.attributedText)
let text2 = txtArama.text as NSString
let text = txtMetin2.text as NSString
println("\(text.length)")
println("\(text2.length)")
var range:NSRange
var checker:NSString = ""

for(var i=0 ; i <= text.length - text2.length ; i++)
{
    range = NSMakeRange(i, text2.length)
    checker = text.substringWithRange(range)
    if(text2 == checker)
    {
        attributedText.addAttribute(NSBackgroundColorAttributeName, value: UIColor.yellowColor(),
            range: range)
        let textAttachment = NSTextAttachment()
        let textAttachmentString = NSAttributedString(attachment: textAttachment)
        attributedText.appendAttributedString(textAttachmentString)
        txtMetin2.attributedText = attributedText
        count++
    }
}
println("\(count)")

i used range variable instead of highlighted range in attributedText.addAtrribute()