[RDG]

Hi, is there a method that returns the number of lines in an NSTextView? Something like:

[textView numberOfLines];

If not, how can I do this?

Thanks in advanced

[Chuckit]

Text Layout Programming Guide for Cocoa: Counting Lines of Text

[RDG]

Ok, so I got it to work like this:

- (void)awakeFromNib
{
string = [textView string];
unsigned numberOfLines;
unsigned index;
unsigned stringLength = [string length];
for (index = 0, numberOfLines = 0; index < stringLength; numberOfLines++)
{
index = NSMaxRange([string lineRangeForRange:NSMakeRange(index, 0)]);
[textField setIntValue:numberOfLines + 1];
}
}

I put '+ 1' because, I don't know why, it starts from zero. It works perfectly except It just counts them once. If you modify the text view, the text field doesn't change. How can I make it to coninuously check for changes in the text view?

Thanks for your help.

[Chuckit]

The simplest way would be to give the text view a delegate whose textDidChange: method runs that same code again to update your line count. This may or may not be fast enough for your purposes — I think it's basically O(n) for the number of characters in your document, and it will be called literally every time the user does anything in the text view.

By the way, in C-based languages, ranges almost always start at 0 (e.g., the first item in an array is at index 0).