In UITextView subclass for iOS 7, UITextView contentSize.Height returns wrong value

Hello,

When the UITextView is subclassed, contentSize.height works very well in iOS 6 downwards, but in iOS 7 it fails and returns the value which is far less than the actual value.

Here is the fix.

Replace the float height=textView.contentSize.height by

float height=[self measureHeight];

-(void) measureHeight
{

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000

    if ([self respondsToSelector:@selector(snapshotViewAfterScreenUpdates:)])

    {

        CGRect frame = internalTextView.bounds;

        CGSize fudgeFactor;

        // The padding added around the text on iOS6 and iOS7 is different.

        fudgeFactor = CGSizeMake(10.0, 16.0);

        

        frame.size.height -= fudgeFactor.height;

        frame.size.width -= fudgeFactor.width;

        

        NSMutableAttributedString* textToMeasure;

        if(internalTextView.attributedText && internalTextView.attributedText.length > 0){

            textToMeasure = [[NSMutableAttributedString alloc] initWithAttributedString:internalTextView.attributedText];

        }

        else{

            textToMeasure = [[NSMutableAttributedString alloc] initWithString:internalTextView.text];

            [textToMeasure addAttribute:NSFontAttributeName value:internalTextView.font range:NSMakeRange(0, textToMeasure.length)];

        }

        

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

        {

            [textToMeasure appendAttributedString:[[NSAttributedString alloc] initWithString:@"-" attributes:@{NSFontAttributeName: internalTextView.font}]];

        }

        

        // NSAttributedString class method: boundingRectWithSize:options:context is

        // available only on ios7.0 sdk.

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

                                                  options:NSStringDrawingUsesLineFragmentOrigin

                                                  context:nil];

        

        return CGRectGetHeight(size) + fudgeFactor.height;

    }

    else

    {

        return self.internalTextView.contentSize.height;

    }

#else

    return self.internalTextView.contentSize.height;

#endif

}

This should work.