iphone - How to find UITextView number of lines

Question

I have to find the number of lines of a UITextView. There is no property available, like anumberOfLines, on UITextView. I use the following formula, but it not doesn't work. Does anybody have an idea about this?

int numLines = txtview.contentSize.height/txtview.font.lineHeight;

Answer 1

If you are using iOS 3, you need to use the leading property:

int numLines = txtview.contentSize.height / txtview.font.leading;

If you are using iOS 4, you need to use the lineHeight property:

int numLines = txtview.contentSize.height / txtview.font.lineHeight;

And, as @thomas pointed out, be careful of rounding if you need an exact result.