in swift how to dismiss the key board - swift

Question

I am wondering how to dismiss a key board if the user touches outside the UITextField. I am using Xcode 6.1. I added a UITextField to a UIViewController as per the below thru ViewDidLoad() function. Any help on dismissing the key board would be much appreciated.
class PickerdemoViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate{
var textBox1 : UITextField!
override func viewDidLoad() {
//..................adding text box.........................//
self.textBox1 = UITextField (frame: CGRectMake(100, 152.5, 50, 35))
textBox1.delegate = self
textBox1.backgroundColor = UIColor.whiteColor()
textBox1.placeholder = "enter"
textBox1.keyboardType = UIKeyboardType.DecimalPad
self.textBox1.resignFirstResponder()
textBox1.keyboardAppearance = UIKeyboardAppearance.Default
self.view.addSubview(textBox1)
super.viewDidLoad()
}

Answer 1

You need to have a reference to the UITextField so make a property value like this
class MyClass: UIViewController {
var textBox1: UITextField!
...
// create your textfield where ever you were by assigning it to self.textBox1
}
Then to dismiss the keyboard you resign its as the first responder.
self.textBox1.resignFirstResponder()
Update to dimiss keyboard
Dismissing on return/done with the textField delegate method
func textFieldShouldReturn(textField: UITextField) -> Bool {
self.textBox1.resignFirstResponder()
return true
}
Dismissing on a button click (custom IBAction method)
#IBAction func buttonClicked(sender: UIButton!) {
self.textBox1.resignFirstResponder()
}

Answer 2

This will dismiss the keyboard by tapping screen. Make sure to not put it in the viewDidLoad.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { // this func lets you close keyboard by touching screen
self.view.endEditing(true) // this line lets you close keyboard by touching screen
}