UITextView get the current line

Question

Is there a way (crazy hacks welcome) to get the current line as a string of a UITextView? This would include word wrapping, etc. For example, in this case:

Answer 1

The following code solution seem to be working. The "self" in this code refers to an instance of UITextView.

- (NSString *) getLineString:(NSRange)range
{
    NSLayoutManager *manager = self.layoutManager;

    // Convert it to a glyph range
    NSRange matchingGlyphRange = [manager glyphRangeForCharacterRange:range actualCharacterRange:NULL];

    // line fragment rect at location range
    CGRect rect = [manager lineFragmentRectForGlyphAtIndex:matchingGlyphRange.location effectiveRange:nil];

    // obtain the line range for the line fragment rect
    NSRange lineRange = [manager glyphRangeForBoundingRect:rect inTextContainer:self.textContainer];

    // extract the string out from lineRange
    return [self.text substringWithRange:lineRange];
}

// ... later
NSLog(@"line %@", [self getLineString:self.selectedRange]);

Answer 2

I ended up using the caretRect method of UITextInput to get the offset from the left. Worked flawlessly.

Answer 3

This worked for me (self = the UITextView)

func getLineString() -> String {
    return (self.text! as NSString).substringWithRange((self.text! as NSString).lineRangeForRange(self.selectedRange))
}