如何在主视图的滚动视图内的子视图中关闭IOS Swift中的键盘？

Question

I am having a 2 Subviews inside a scroll view in a main view. Bases on a two buttons in the scroll view the 2sub views will show and hide. Both the subviews have one text field each to enter numbers. the keypad is a num pad. I have implemented func touchesBegan and also the UITapGestureRecognizer for both the subviews and added the resignFirstResponder() as well as endEditing(true) . But still my keyboard does not goes away. I cant find a proper solution for this type of scenario in any forum.

I am using Swift 2.0 xcode7.1.1

Edit: My code ( Since it is a business project i cannot share the full content sorry)

in this code when i touch outside in the viewAutomatic the keyboard goes. but when i touch outside in the viewManual the keyboard does not goes off. It is so weird for me.

@IBOutlet weak var viewScroll: UIScrollView!
@IBOutlet weak var txtNewBid: UITextField!
@IBOutlet weak var txtMyMaxBid: UITextField!
@IBOutlet weak var viewManual: UIView!
@IBOutlet weak var viewAutomatic: UIView!


override func viewDidLoad() {
 let singleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: "singleTapped:")
        singleTapGestureRecognizer.numberOfTapsRequired = 1
        singleTapGestureRecognizer.numberOfTouchesRequired = 1
        singleTapGestureRecognizer.enabled = true
        singleTapGestureRecognizer.cancelsTouchesInView = false

        self.viewManual.addGestureRecognizer(singleTapGestureRecognizer)
        self.viewAutomatic.addGestureRecognizer(singleTapGestureRecognizer)
}
 override func viewWillAppear(animated: Bool) {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}

 func singleTapped(sender: UITapGestureRecognizer) {

    self.view.endEditing(true)
    self.viewManual.endEditing(true)
    self.viewAutomatic.endEditing(true)
    self.viewScroll.endEditing(true)
    txtNewBid.resignFirstResponder()
    txtMyMaxBid.resignFirstResponder()

}
 override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    self.view.endEditing(true)
    txtNewBid.resignFirstResponder()
    txtMyMaxBid.resignFirstResponder()
}

func keyboardWillShow(notification: NSNotification) {
    // adjusting the scroll view for the keyboard
    let frame = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
    if( self.viewManual.hidden == true)
    {
        self.viewScroll.frame.size.height -= frame.height 
    }
    else
    {
        self.viewScroll.frame.size.height -= frame.height 
    }
    let bottomOffset: CGPoint = CGPointMake(0, self.txtNewBid.frame.origin.y + self.txtNewBid.frame.size.height)
    self.viewScroll.contentOffset = bottomOffset
}

func keyboardWillHide(notification: NSNotification) {

    let frame = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
    if( self.viewManual.hidden == true)
    {
        self.viewScroll.frame.size.height += frame.height 
    }
    else
    {
        self.viewScroll.frame.size.height += frame.height 
    }

    }
override func viewWillDisappear(animated: Bool) {
    NSNotificationCenter.defaultCenter().removeObserver(self)
    txtNewBid.text = ""
    txtMyMaxBid.text = ""
}

Answer 1

My guess is that you are approaching the problem the wrong way. I assume that the controller should be responsible for dismissing the keyboard, but you might try something like this (preferrably on your hosting view controller):

yourView.endEditing(true) // boolean parameter specifies whether to force dismissal or not

endEditing(force) should traverse the view hierarchy and check for any active responders, so this should actually work. Have you checked if you indeed reference the correct view ? Can you add some of your code (Please just the necessary portions) ?

The reason I point out that it's important to call this on your hosting controller's view is that it goes through all the subviews and checks for any active responders.

If you have a reference to the textfield and you know for sure which one it is you can also call

yourTextField.resignFirstResponder()

I guess that's what endEditing(force) does internally, it traverses all the subviews and calls resignFirstResponder() on any textField it encounters that also is the first responder.

EDIT

Due to the fact that the UIScrollView will intercept gestures, I would directly add the tap gesture recognizer to the scroll view like so:

self.viewScroll.addGestureRecognizer(singleTapGestureRecognizer)

And then do something like this:

func singleTapped(sender: UITapGestureRecognizer) {

    // this should suffice
    self.viewScroll.endEditing(true)
    // or call it on the touched view (in this case the viewScroll)
    // sender.view.endEditing(true)

}