HideKeyBoard when tap outside of TextField or scroll a scrollView in Swift

HideKeyBoard.swift

/*
* For iOS 7 or later
* 1. In IB, set keyboard attr. to "Dismiss on drag" 
*         or in ViewDidLoad write   
*         self.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag
*   https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIScrollView_Class/#//apple_ref/c/tdef/UIScrollViewKeyboardDismissMode
* 2. Add UITapGestureRecognizer in ViewDidLoad 
*/

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    // Your init code here 
    
    // This only catch tapGesture outside of textField. keyboardDismissMode has to be set for scrolling(not tap) scrollView
    var tapGesture = UITapGestureRecognizer(target:self, action: "hideKeyBoard")
    tapGesture.cancelsTouchesInView = false
    self.view.addGestureRecognizer(tapGesture)
}

func hideKeyBoard() {
    self.myTextField.resignFirstResponder()
}