UITextView will shorten text?

Question

How to know wether UITextView will shorten text because lack of space? I know I can calculate with boundingRectWithSize and sizeThatFit, but what if exclusionPaths of the UITextView is changed. I want lay out string in a polygon, and increase polygon size, until string laid out without shortening. Any idea, how can get a bool return, wether current setup will shorten?

self.tv.textContainer.exclusionPaths = myArrayOfBezierPaths;

Answer 1

func isSizeFitForTextView() -> Bool{
    let layoutManager = self.textView.layoutManager
    let glyphIndex = layoutManager.glyphIndexForCharacter(at:( self.textView.text as NSString).length)

    let range = layoutManager.truncatedGlyphRange(inLineFragmentForGlyphAt: glyphIndex)

    return range.location != NSNotFound
}