Swift - How to call Selector() on method with arguments?

Question

I'm learning Swift and need to call my method on tap, here is the code:

var gestureRecognizer = UITapGestureRecognizer()
myView.addGestureRecognizer(gestureRecognizer)
gestureRecognizer.addTarget(self, action: Selector(dismiss(nil)))

This returns error - Could not find an overload for init that accepts the supplied arguments

I also tried like Selector("dismiss:nil") and Selector("dismiss(nil)") with no luck..

Here the method I'm calling:

func dismiss(completion: (() -> Void)!) {
    self.dismissViewControllerAnimated(true, completion: completion)
}

The answer you reference does not answer this question, which is asking how to pass arguments to a function. dismiss() vs dismiss(theParameter :String) for instance. — Scooter, Aug 07 '14 at 15:18

score 18 · Accepted Answer · edited Jul 08 '16 at 09:40

18

Just use the name of the method as a string:

gestureRecognizer.addTarget(self, action: "dismiss:")

Edit: In Swift 3.0 you will have to use the following syntax:

gestureRecognizer.addTarget(self, action: #selector(dismiss(_:)))

edited Jul 08 '16 at 09:40

Nirav D

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answered Jun 28 '14 at 13:57

dasdom

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score 8 · Answer 2 · answered Jun 28 '14 at 13:59

8

You don't pass arguments in selectors. You only represent that there is one with a colon. Additionally, you don't have to use the Selector type at all. If you pass in a String literal, it is converted to a Selector for you.

gestureRecognizer.addTarget(self, action:"dismiss:")

answered Jun 28 '14 at 13:59

Mick MacCallum

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20

Then where do you pass the arguments? – Michael Yaworski Jul 31 '16 at 03:30

Swift - How to call Selector() on method with arguments?

2 Answers2