selector

I'm trying to call a method after some delay. I know there is a solution for that: [self performSelector:@selector(myMethod) withObject:nil afterDelay:delay]; I saw this question and Documentation But my question is: How can I call a method that takes two parameters?? for instance: - (void) MoveSomethigFrom:(id)from To:(id)to; How would I call this method with delay, using performSelector:withObject:afterDelay: Thanks Martin Ullrich use dispatch_after: double delayInSeconds = 2.0; dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC); dispatch_after(popTime,

I want to use a selector on an NSObject instance without the need for an implemented protocol. For example, there's a category method that should set an error property if the NSObject instance it's called on supports it. This is the code, and the code works as intended: if ([self respondsToSelector:@selector(setError:)]) { [self performSelector:@selector(setError:) withObject:[NSError errorWithDomain:@"SomeDomain" code:1 userInfo:nil]]; } However, the compiler doesn't see any method around with the setError: signature, so it gives me a warning, for each line that contains the @selector

I'm trying to create multiple buttons with a for loop, but I'm having problems using the (sender:) function. I have the following code func setUpButtons(){ for i in 1...3 { let btn: UIButton = UIButton(frame: CGRect(x: 100, y: 100, width: 75, height: 100)) btn.center = CGPoint(x: 20 + 100.0 * CGFloat(i), y: 200) btn.backgroundColor = UIColor.green btn.setTitle("Click Me", for: UIControlState.normal) btn.addTarget(self, action: Selector(("buttonAction:")), for: UIControlEvents.touchUpInside) btn.tag = i self.view.addSubview(btn) } } func buttonAction(sender: UIButton!) { let btnsendtag:

I have a cell in a tableView, with a button I want to add an action to. The button will be an email address. When the button is pressed, I want to trigger a delegate that will have another ViewController open up an email. However, I need to be able to pass in the email as a parameter and Swift doesn't seem to let me do that. Relevant code is below: func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let row = self.sections[indexPath.section].rows[indexPath.row] switch row { case .Email: cell.infoLabel.setTitle(cellInfo.email, for: .normal) cell

I have two labels, Label1 and Label2. I want to make a single function that prints out which label is tapped by creating UITTapRecognizer for both labels calling the same function with selector that passes an argument. Below is the long way of doing it which is messy but works. If I know how to pass an argument (Int) into the selector, it would be alot cleaner. let topCommentLbl1Tap = UITapGestureRecognizer(target: self, action: #selector(DiscoverCell().doubleTapTopComment1)) topCommentLbl1Tap.numberOfTapsRequired = 2 topCommentLbl1.userInteractionEnabled = true topCommentLbl1

hey guys, i wanna create the simplest bookmarklet for my browser. javascript:document.getElementsByClassName('source').style.visibility='visible'; I have multiple div.source in my body. By default they are set to .source { display:none; } with css. My console tells me: Uncaught TypeError: Cannot set property 'display' of undefined When I click the bookmarklet all .source divs should be visible. What am I doing wrong here? You might need to loop through the results, like this: var divs = document.getElementsByClassName('source'); for(var i=0; i<divs.length; i++) { divs[i].style.display='block'