Attributed text kullanırken TextView'ın toplam metin yüksekliğini hesaplama

Ne yaptıysam textView.contentSize.height hep yanlış değerler geliyordu. Biyerlerden aşağıdaki kodu buldum ve şıkır şıkır çalışıyor.

- (CGFloat)measureHeightOfUITextView:(UITextView *)aTextView

{

    if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1)

    {

        // This is the code for iOS 7. contentSize no longer returns the correct value, so

        // we have to calculate it.

        //

        // This is partly borrowed from HPGrowingTextView, but I've replaced the

        // magic fudge factors with the calculated values (having worked out where

        // they came from)

        

        CGRect frame = aTextView.bounds;

        

        // Take account of the padding added around the text.

        

        UIEdgeInsets textContainerInsets = aTextView.textContainerInset;

        UIEdgeInsets contentInsets = aTextView.contentInset;

        

        CGFloat leftRightPadding = textContainerInsets.left + textContainerInsets.right + aTextView.textContainer.lineFragmentPadding * 2 + contentInsets.left + contentInsets.right;

        CGFloat topBottomPadding = textContainerInsets.top + textContainerInsets.bottom + contentInsets.top + contentInsets.bottom;

        

        frame.size.width -= leftRightPadding;

        frame.size.height -= topBottomPadding;

        

        NSString *textToMeasure = aTextView.text;

        if ([textToMeasure hasSuffix:@"\n"])

        {

            textToMeasure = [NSString stringWithFormat:@"%@-", aTextView.text];

        }

        

        // NSString class method: boundingRectWithSize:options:attributes:context is

        // available only on ios7.0 sdk.

        

        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

        [paragraphStyle setLineBreakMode:NSLineBreakByWordWrapping];

        

        NSDictionary *attributes = @{ NSFontAttributeName: aTextView.font, NSParagraphStyleAttributeName : paragraphStyle };

        

        CGRect size = [textToMeasure boundingRectWithSize:CGSizeMake(CGRectGetWidth(frame), MAXFLOAT)

                                                  options:NSStringDrawingUsesLineFragmentOrigin

                                               attributes:attributes

                                                  context:nil];

        

        CGFloat measuredHeight = ceilf(CGRectGetHeight(size) + topBottomPadding);

        return measuredHeight;

    }

    else

    {

        return aTextView.contentSize.height;

    }

}