No method declared with Objective-C selector ('nextPage') - ios

Question

xcode creates some warnings since I updated to 7.3.1: "No method declared with Objective-C selector ('nextPage')". I'm not sure what I need to do now. These are the two lines that produce the warning:
let leftSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
let rightSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
This is the entire VC code:
import Foundation
import UIKit
class VC1 : UIViewController {
class MyCustomNavigationController: UINavigationController {
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return (visibleViewController?.supportedInterfaceOrientations())!
}
override func shouldAutorotate() -> Bool {
return (visibleViewController?.shouldAutorotate())!
}
}
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.Portrait
}
override func shouldAutorotate() -> Bool {
return true
}
override func viewDidLoad() {
super.viewDidLoad()
func nextPage(sender:UISwipeGestureRecognizer) {
switch sender.direction {
case UISwipeGestureRecognizerDirection.Left:
print("SWIPED LEFT", terminator: "")
self.performSegueWithIdentifier("seg1", sender: nil)
default:
break
}
let leftSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
let rightSwipe = UISwipeGestureRecognizer (target: self, action: Selector("nextPage"))
leftSwipe.direction = .Left
rightSwipe.direction = .Right
view.addGestureRecognizer(leftSwipe)
view.addGestureRecognizer(rightSwipe)
}
}
}
I found this when researching:
Selector("funcName") was changed to #selector(ClassName.funcName)
I imagine that "funcName" would be nextPage, but what do I have to set as ClassName?
Unfortunately, xcode doesn't provide any suggestions to fix this. Hope you can help. Thanks.

Answer 1

You need to put nextPage out of viewDidLoad() and then #selector(VC1.nextPage)
func nextPage(sender:UISwipeGestureRecognizer) {
switch sender.direction {
case UISwipeGestureRecognizerDirection.Left:
print("SWIPED LEFT", terminator: "")
self.performSegueWithIdentifier("seg1", sender: nil)
default:
break
}
}
override func viewDidLoad() {
super.viewDidLoad()
let leftSwipe = UISwipeGestureRecognizer (target: self, action: #selector(VC1.nextPage))
let rightSwipe = UISwipeGestureRecognizer (target: self, action: #selector(VC1.nextPage))
}