Multiple Parameters/Arguments for Action - Swift

Question

I found a question most similar to mine however it was not thoroughly answered. It would be great if anyone could help me out. The place where I found the similar question is here.

I understand clearly how func test() would be "test" and test(object:AnyObject) would be "test:". Thanks to this.

So how about 2 parameters? Can swift not do 2 arguments for 'action:'?

func popoverSelectedCode (code:AnyObject, desc:AnyObject)

I tried testing it out in few different ways below, but to no avail:

action: "popoverSelectedCode:,"

action: "popoverSelectedCode:,:"

action: "popoverSelectedCode: :"

action: "popoverSelectedCode: , :"

Am only about a week's old in Swift so please be kind.

EDITED Here is a short clip of the code

@IBAction func securityQuestButtonClicked (sender:AnyObject)
{
    cellButton = sender as? UIButton;

    var comboDescListArray = TableRoutine.loadCombobox("MobileQuestion")

    var codeObject : NSArray = comboDescListArray[0] as NSArray;
    var descObject : NSArray = comboDescListArray[1] as NSArray;

    var selectionTVC = CPSelectionTVC(style:UITableViewStyle.Plain, codeArray:codeObject, descArray:descObject, target:self, action: "popoverSelectedCode::", widthForViewInPopover:650)

    let navCtl = UINavigationController.init(rootViewController:selectionTVC)
    popoverController = UIPopoverController.init(contentViewController:navCtl)

    var contentHeight : CGFloat = CGFloat (UInt(selectionTVC.navigationTitleHeight) + UInt(selectionTVC.rowCount()) * UInt(selectionTVC.cellHeight))

    popoverController?.popoverContentSize = CGSizeMake(400.0, contentHeight)
    popoverController?.presentPopoverFromRect(sender.bounds, inView:sender as UIView, permittedArrowDirections:UIPopoverArrowDirection.Up, animated:true)
}

The popover appears however upon selecting, it just hangs.

Did you get an answer ? i am dealing with the same problem. If so how did you write your selector with multiple parameters, and how does the action function looks like. thanks. — Koray Birand, Apr 27 '15 at 14:49
Unfortunately no. I was busy with other things, but I spent the whole day today trying to search for new answers. Do keep me posted if you happen to come across an answer. — Rach Ng, Apr 29 '15 at 07:57

score 11 · Accepted Answer · answered Mar 24 '16 at 07:58

11

Just a note on Swift 2.2. You can now type the selector as

#selector(popoverSelectedCode(_:desc:)

answered Mar 24 '16 at 07:58

Erik Johansson

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TY! still getting used to new selector. Just In case it helps anyone else I was able to use selector to call a delegate method like so in Swift 2.2 `textField.delegate?.performSelector(#selector(textField(_:shouldChangeCharactersInRange:replacementString:)))` – NSGangster May 04 '16 at 13:56

score 2 · Answer 2 · answered Sep 29 '15 at 09:51

2

check this below code

func switchCard(card: Int, withCard card1: Int) {
    print(card)
}
let singleTap1 = UITapGestureRecognizer(target: self, action: "switchCard:withCard:")

answered Sep 29 '15 at 09:51

Narendra G

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While this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value. – JAL Sep 29 '15 at 20:32

score 2 · Answer 3 · answered Sep 26 '16 at 07:16

In Swift 2.2 you can do something like this.

myUISlider.addTarget(self, action:#selector(self.onSliderValChanged(_:withEvent:)), forControlEvents: .ValueChanged)

func onSliderValChanged(slider: UISlider, withEvent event: UIEvent?) {
    }

I hope it helps someone out there.

score 1 · Answer 4 · answered Jan 13 '15 at 07:14

1

With two parameters it becomes action::. One colon for one argument.

answered Jan 13 '15 at 07:14

mustafa

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Could you elaborate or perhaps give an example? – Rach Ng Jan 13 '15 at 07:17
There is nothing to elaborate. You supplied popoverSelectedCode function as action for some target. In swift you can turn it a selector like this. "popoverSelectedCode::". Two colon says this action takes two parameters. All this inspecting/resolving performed in runtime by the objective-c runtime – mustafa Jan 13 '15 at 07:22
I tried as you have suggested but unfortunately it still does not pass into the action function at all. – Rach Ng Jan 13 '15 at 07:26
What is the source of this action ? – mustafa Jan 13 '15 at 07:28

score 1 · Answer 5 · answered Jan 13 '15 at 08:06

1

If the function has two parameters like below.

func clicked(sender:AnyObject,value:AnyObject)
{
}

Then

action = "clicked::"

answered Jan 13 '15 at 08:06

rakeshbs

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hi rakeshbs, yeap! I tried that as shown in my edited part. But problem is, the popover wont move. It just hangs there in the selected state. – Rach Ng Jan 13 '15 at 08:22
I have pasted the entire function as you requested. I did not see the need to paste the action function as its not even passing through. – Rach Ng Jan 13 '15 at 08:50
var selectionTVC = CPSelectionTVC(style:UITableViewStyle.Plain, codeArray:codeObject, descArray:descObject, target:self, action: "popoverSelectedCode::", widthForViewInPopover:650) – Rach Ng Jan 13 '15 at 09:12
is `CPSelectionTVC` a `UITableViewController`? – rakeshbs Jan 13 '15 at 09:45

score 0 · Answer 6 · answered Sep 29 '15 at 09:48

0

Here is the way you can achieve it in your case:

action: "popoverSelectedCode:desc:"

answered Sep 29 '15 at 09:48

Dharmesh Kheni

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score 0 · Answer 7 · edited Aug 05 '16 at 06:44

0

For multiple arguments passes in selector method:

let swipeRecognizer = UISwipeGestureRecognizer.init(target: self, action: #selector(ImageViewController.handleTap(_: sender :)))
myCell.imageViewPhoto .addGestureRecognizer(swipeRecognizer)

edited Aug 05 '16 at 06:44

Pang

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answered Aug 05 '16 at 06:21

Parth

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Multiple Parameters/Arguments for Action - Swift

7 Answers7