CODEWITHSUNDEEP
iosobjective-cswiftselector
user172902
user172902

Reputation: 3581

pass argument in selector for scheduleTimerwithTimeInterval

In swift, I have a uitableviewCell that has double tap and single tap implemented. The double tap works. However, I am having a bit of trouble with single tap. Due to the present of double tap, I implemented single tap with a timer. The following code successfully prints out "Single Tapped" 

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    var now = NSDate().timeIntervalSince1970

    if (now - lastClick < 0.3) && indexPath.isEqual(lastIndexPath) {
        // Double tapped on cell
        if let cell = discoverTableView.cellForRowAtIndexPath(indexPath) as? CommentCell {
            cell.doubleTapCellActive({ (addBumpStatus, success) in
            })
        }
        singleTapTimer?.invalidate()

    } else {
        singleTapTimer = NSTimer.scheduledTimerWithTimeInterval(0.31, target: self, selector: #selector(DiscoverVC.singleTapped), userInfo: nil, repeats: false)
    }
    lastClick = now
    lastIndexPath = indexPath
}

func singleTapped() {
    print("Single tapped")
}

However, the problem is, I want the single tap to know which index path was selected. I tried doing something like 

#selector(DiscoverVC.singleTapped(_:indexPath))
func singleTapped(indexPath: NSIndexPath) {}

But this gives me an error as selector does not like this syntax. Is there a way to make the selector work or a better way of doing it?

Thanks,

Upvotes: 1

Views: 177

Answers (1)

vadian
vadian

Reputation: 285039

The usual way is to implement the action with the NSTimer parameter

func singleTapped(timer : NSTimer) {
   print("Single tapped", timer.userInfo!["indexPath"] as! NSIndexPath)
}

and pass custom data via the userInfo property of the timer for example

singleTapTimer = NSTimer.scheduledTimerWithTimeInterval(0.31, 
                         target: self, 
                         selector: #selector(singleTapped(_:)), 
                         userInfo: ["indexPath":indexPath], 
                         repeats: false)

Upvotes: 1

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