Convert selectedTextRange UITextRange to NSRange

Question

How can I convert a UITextRange object to an NSRange? I\'ve seen plenty of SO posts about going the other direction but that\'s the opposite of wha

Answer 1

Here's a Swift extension based on the answer by Vitaly S.

extension UITextInput {
    var selectedRange: NSRange? {
        guard let range = self.selectedTextRange else { return nil }
        let location = offsetFromPosition(beginningOfDocument, toPosition: range.start)
        let length = offsetFromPosition(range.start, toPosition: range.end)
        return NSRange(location: location, length: length)
    }
}

Swift 4

extension UITextInput {
    var selectedRange: NSRange? {
        guard let range = selectedTextRange else { return nil }
        let location = offset(from: beginningOfDocument, to: range.start)
        let length = offset(from: range.start, to: range.end)
        return NSRange(location: location, length: length)
    }
}