Swift how to hide keyboard?

Question

Apple Xcode

I can not hide the keyboard when tapping on any area. I have for different text fields, different clav styles. And on some there is no "return" - "done" button. How to deal with such a task? To hide any "ANY" keyboard when tapping on any area.
UPD:
The same for Swift: (for those who don't want to mess around with objective-c, I write the code here)

override func viewDidLoad() {
        super.viewDidLoad()
        var theTap = UITapGestureRecognizer(target: self, action: "scrollViewTapped:")
        scroll.addGestureRecognizer(theTap)
    }

And the method:

func scrollViewTapped(recognizer: UIGestureRecognizer) {
        scroll.endEditing(true)
    }

Answer 1

Somewhere add a tap handler. Best in viewDidLoad.

UITapGestureRecognizer *tp = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                         action:@selector(randomTap:)];
[self.view addGestureRecognizer:tp];

Adding a Method

- (void)randomTap:(id)sender {
    [self.view endEditing:YES];
}