Check if rightBarButtonItem exists or not

Question

Is there a way to check if the current view already has a right bar button, something like:

if (FOO_CODE.rightBarButtonItem != nil) {
    // don't create one
} else {
    // create one
}

score 3 · Answer 1 · answered Apr 08 '11 at 00:53

3

if (self.navigationItem.rightBarButtonItem != nil)
{
   // I exists
} else {
   // I don't exists
}

answered Apr 08 '11 at 00:53

Jordan

score 0 · Accepted Answer · answered Apr 08 '11 at 03:03

0

if (self.navigationItem.rightBarButtonItem)

has the same effect, testing equality to nil is redundant

answered Apr 08 '11 at 03:03

Stefan Ticu

This is incorrect in the case of the rightBarButtonItem because it's an optional. The compiler will actually flag this as an error if you try it on Swift 4 and above, and will tell you to add `!= nil` – kakubei Sep 25 '19 at 10:56

2 Answers2