Deleting a line of text on an NSTextView

I have a NSTextView called TheTextView. I'm adding there lines of text, each line representing a full path to a file with a \n at the end. The textview is set to not editable. I add or remove text via a + and - buttons.

Supposedly the user can select a line and delete it. I've tried with

[TheTextView delete:nil];

But nothing happens. How can I delete the selected line? And while we are in this topic, is there any way to set the TextView to select the whole line when I click on one line?

Thanks

EDIT:

OK, so I found that if I do the following

[TheTextVi开发者_Python百科ew setEditable:YES]; 
[TheTextView delete:nil]; 
[TheTextView setEditable:NO]; 

then it works. Now I need to know how to select the entire line when the user click it because otherwise it will leave a blank space in between the two lines where the one deleted was. Ideas?

---

It sounds like no text is selected when you call [TheTextView delete:nil]. Try calling setSelectedRange: with a range to select a line of text, then try calling delete:. For example:

[TheTextView setSelectedRange:NSMakeRange(0,24)];
[TheTextView delete:nil];

Of course, you'll need to determine the correct start and length of your range to correspond the text you want to delete.