CODEWITHSUNDEEP
objective-ccocoanstableview
Jaggu
Jaggu

Reputation: 25

selectedRow return null

i have a NSTableView on a window, the data is populated using a NSMutableArray and that is Ok

after selecting a rows, when i check in code

[myTableView selectedRow];

or 

[myTableView clickedRow];

both return null

Can anyone help?

Upvotes: 0

Views: 338

Answers (1)

Peter Hosey
Peter Hosey

Reputation: 96353

selectedRow and clickedRow each return an NSInteger, not an object. They're returning 0, which is the index of the first row.

If you print 0 as if it were an object (e.g., with NSLog(@"%@", [myTableView selectedRow])), it will print as nil, simply because that's what nil is: 0 as an object pointer.

Of course, this assumes that myTableView actually refers to a table view in the first place. If myTableView does not yet point to a table view (i.e., the myTableView variable itself holds nil), any message to it will in turn return 0 (which, again, looks like nil if you treat it as an object).

If selectedRow returns 0 when the first row isn't selected or there are no rows, or clickedRow returns 0 when the first row hasn't been clicked, make sure myTableView points where you expect it to.

(I'm deliberately leaving the more specific explanation of the problem and its solution to you, Jaggu, since you said in the comments that you found it already.)

Upvotes: 2

Related Questions