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Attention: UIAlertController présente déjà

Je suis un novice dans Swift et XCode, alors pardonnez-moi le code probablement très compliqué! Lors de l’exécution de mon code, l’avertissement suivant est émis:

J'ai déjà consulté le forum et trouvé un article à ce sujet. J'ai appliqué l'aide proposée dans:

if presentedViewController !== nil {
     self.presentViewController(alertController, animated: true, completion: nil)
} else{
     self.dismissViewControllerAnimated(false, completion: nil)
     self.presentViewController(alertController, animated: true, completion: nil)
}

Cependant, cela me donne toujours le même avertissement ... Je suppose donc que j'ai dû faire quelque chose de mal là-bas. Ce serait génial si quelqu'un pouvait m'aider s'il vous plait :) De plus, toute suggestion quant à la façon dont je pourrais "nettoyer" mon code serait appréciée :)

import UIKit

class ViewController: UIViewController {

@IBOutlet var Label: UILabel!

@IBOutlet var ukFlag: UITextView!

@IBOutlet var movie: UITextView!

@IBOutlet var piano: UITextView!

@IBOutlet var book: UITextView!

@IBOutlet var dance: UITextView!

@IBOutlet var Paint: UITextView!

@IBOutlet var row: UITextView!

@IBOutlet var envelope: UITextView!

@IBOutlet var dragon: UITextView!

@IBOutlet var instagram: UITextView!


func londonPuzzle(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
      self.ifCollided()


}


func misleadOne(sender: UIPanGestureRecognizer) {

    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func bestival(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
      self.ifCollided()

    }

func rosieProject(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func misleadTwo(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func misleadThree(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func misleadFour(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}
func voucher(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func welsh(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func hulk(sender: UIPanGestureRecognizer) {
    let translation = sender.translationInView(self.view)
    sender.view!.center = CGPoint(x: sender.view!.center.x + translation.x, y: sender.view!.center.y + translation.y)
    sender.setTranslation(CGPointZero, inView: self.view)
    self.ifCollided()

}

func ShowAlertWrong(){

    let alertController = UIAlertController(title: "Sorry", message:   " Guess again!", preferredStyle: .Alert)

    let okAction = UIAlertAction( title: "Ok", style:   UIAlertActionStyle.Default) {
        UIAlertAction in

        self.ukFlag.center = CGPointMake(150, 225)
        self.movie.center = CGPointMake(150, 225)
        self.piano.center = CGPointMake(150, 225)
        self.dance.center = CGPointMake(150, 225)
        self.Paint.center = CGPointMake(150, 225)
        self.row.center = CGPointMake(150, 225)
        self.envelope.center = CGPointMake(150, 225)
        self.dragon.center = CGPointMake(150, 225)
        self.instagram.center = CGPointMake(150, 225)
    }

    let resetAction = UIAlertAction( title: "Reset", style: UIAlertActionStyle.Default) {
        UIALertAction in

        self.ukFlag.center = CGPointMake(150, 225)
        self.movie.center = CGPointMake(150, 225)
        self.piano.center = CGPointMake(150, 225)
        self.dance.center = CGPointMake(150, 225)
        self.Paint.center = CGPointMake(150, 225)
        self.row.center = CGPointMake(150, 225)
        self.envelope.center = CGPointMake(150, 225)
        self.dragon.center = CGPointMake(150, 225)
        self.instagram.center = CGPointMake(150, 225)

    }

    alertController.addAction(okAction)
    alertController.addAction(resetAction)
    self.presentViewController(alertController, animated: true, completion: nil)

}




func ShowAlertWin(){



    let alertController = UIAlertController(title: "Congrats????", message: " You are correct!????????", preferredStyle: .Alert)

    let okAction = UIAlertAction( title: "Ok", style: UIAlertActionStyle.Default) {
        UIAlertAction in

        self.book.center = CGPointMake(150, 150)


    }

  /*  let resetAction = UIAlertAction( title: "Reset and hope the mood has changed", style: UIAlertActionStyle.Default) {
        UIALertAction in

        self.Angry.center = CGPointMake(150, 150)
    }*/

    alertController.addAction(okAction)
   // alertController.addAction(resetAction)
    if presentedViewController !== nil {
        self.presentViewController(alertController, animated: true, completion: nil)

    } else{
        self.dismissViewControllerAnimated(false, completion: nil)
        self.presentViewController(alertController, animated: true, completion: nil)
    }



}






@IBAction func ifCollided(){

if CGRectIntersectsRect(Label.frame, ukFlag.frame) {
    ShowAlertWrong()
}
    else if CGRectIntersectsRect(Label.frame, movie.frame){
           ShowAlertWrong()
        } else if CGRectIntersectsRect(Label.frame, piano.frame){
                ShowAlertWrong()
        }  else if CGRectIntersectsRect(Label.frame, dance.frame){
            ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, Paint.frame){
    ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, row.frame){
    ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, envelope.frame){
    ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, dragon.frame){
    ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, instagram.frame){
    ShowAlertWrong()
} else if CGRectIntersectsRect(Label.frame, book.frame){
    ShowAlertWin()
}


}




override func viewDidLoad() {
    super.viewDidLoad()
    ukFlag.addGestureRecognizer(UIPanGestureRecognizer(target: self,      action: #selector(self.londonPuzzle(_:))))
    movie.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.misleadOne(_:))))
    piano.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.bestival(_:))))
    book.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.rosieProject(_:))))
    dance.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.misleadTwo(_:))))
    Paint.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.misleadThree(_:))))
    row.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.misleadFour(_:))))
    envelope.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.voucher(_:))))
    dragon.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.welsh(_:))))
    instagram.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(self.hulk(_:))))


}

}
iosxcodeswiftwarningsuialertcontroller
7
CatiaV5

Vous devez changer votre code de cette façon, présentez le deuxième alertController à la fin du licenciement. Également changer votre condition si avec mon un.

if presentedViewController == nil {
     self.presentViewController(alertController, animated: true, completion: nil)
} else{
      self.dismissViewControllerAnimated(false) { () -> Void in
           self.presentViewController(alertController, animated: true, completion: nil)
      }
}

J'espère que ceci vous aidera.

20
Nirav D

Essaye ça

if let presented = self.presentedViewController {
     presented.removeFromParentViewController()
  }

if presentedViewController == nil {
     self.present(alert, animated: true, completion: nil)
  }
2
Vimal Saifudin

J'apprécie le licenciement des alertes, comme mentionné dans toutes les réponses. Mais personnellement, je ne préférerais jamais rejeter quelque chose que je ne voulais pas évoquer en premier lieu. Par conséquent, si nous pouvions juste regarder pourquoi plusieurs alertes sont générées en premier lieu, ce serait génial. 

Utiliser UIGestureRecogniser pour générer UIAlert est délicat. Les gestes envoient des messages dans tous leurs états sous-jacents. Par exemple: si ci-dessous est mon code: 

// Attaching LongPress to a button
let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(deleteSelectedProfile(_:)))

// Method to generate appropriate alert
@objc func deleteSelectedProfile(_ sender: UILongPressGestureRecognizer) {
    let alert = UIAlertController(title: "Delete Profile", message: "Word!" , preferredStyle: .alert)
    let deleteAction = UIAlertAction(title: "Delete", style: .destructive) { (action) in
        // Code
    }
    alert.addAction(deleteAction)    
    let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
    alert.addAction(cancelAction)
    present(alert, animated: true, completion: nil)
}

UIAlert est appelé pour différents états du geste, commençant par .began, jusqu'au .ended. Par conséquent, si j'ai besoin de code propre, je ne voudrais jamais ignorer les alertes créées dans chacun des états du Gesture, je ne générerai qu'un seul UIAlert. Sens, je voudrais simplement utiliser l'Etat comme ma condition. 

Voici donc ce que je vais changer:

@objc func deleteSelectedProfile(_ sender: UILongPressGestureRecognizer) {
    if sender.state == .began {
        let alert = UIAlertController(title: "Delete Profile", message: "Word!" , preferredStyle: .alert)
        let deleteAction = ...
        alert.addAction(deleteAction)    
        let cancelAction = ...
        alert.addAction(cancelAction)
        present(alert, animated: true, completion: nil)
    }
}

De cette façon, je générerai une alerte et une alerte uniquement si nécessaire.

0
Manganese

Vous pouvez présenter un autre UIAlertController ou tout autre élément de UIAlertController actuellement présenté. Créez une fonction d'assistance pour obtenir le meilleur contrôleur de vue visible, puis effectuez un appel présent sur celui-ci.

func topVisibleViewController(viewController: UIViewController) -> UIViewController? {
    let viewController = viewController ?? UIApplication.shared.keyWindow?.rootViewController

    if let navigationController = viewController as? UINavigationController, !navigationController.viewControllers.isEmpty {
        return visibleViewController(navigationController.viewControllers.last)
    }
    else if let tabBarController = viewController as? UITabBarController,
        let selectedController = tabBarController.selectedViewController {
        return visibleViewController(selectedController)
    }
    else if let presentedController = viewController?.presentedViewController {
        return visibleViewController(presentedController)
    }

    return viewController
}
0
Long.h.nguyen