UITextView: Disable selection, allow links

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I find the concept of fiddling with the internal gesture recognizers a little scary, so tried to find another solution.
I’ve discovered that we can override point(inside:with:) to effectively allow a “tap-through” when the user isn’t touching down on text with a link inside it: 

// Inside a UITextView subclass:
override func point(inside point: CGPoint, with event: UIEvent?) -> Bool {

    guard let pos = closestPosition(to: point) else { return false }

    guard let range = tokenizer.rangeEnclosingPosition(pos, with: .character, inDirection: .layout(.left)) else { return false }

    let startIndex = offset(from: beginningOfDocument, to: range.start)

    return attributedText.attribute(.link, at: startIndex, effectiveRange: nil) != nil
}

This also means that if you have a UITextView with a link inside a UITableViewCell, tableView(didSelectRowAt:) still gets called when tapping the non-linked portion of the text 🙂

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