ios - 使用标签栏在 View 中关闭键盘

Question

我正在使用 tabview，它工作正常，但如果我添加代码以通过单击任何地方来关闭键盘，则 tabbar 停止工作，但所有其他按钮工作。这是我用来关闭键盘的代码:

extension UIViewController {
func hideKeyboardWhenTappedAround() {
    let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
    view.addGestureRecognizer(tap)
}

func dismissKeyboard() {
    view.endEditing(true)
}

Answer 1

我不确定这是处理此问题的最佳方法，但未经实验，这似乎是我所知道的唯一万无一失的方法。这将创建一个不可见的 View ，它可以识别点击并在点击时自行删除。

class ThisViewController: UITableViewDelegate, UITableViewDatasource {

    var tapView: ClickThroughView?

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(LoginViewController.keyboardWillShow), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(LoginViewController.keyboardWillHide), name: UIKeyboardWillHideNotification, object: nil)
    }

    func keyboardWillShow(notification: NSNotification) {
        tapView = ClickThroughView(frame: view.frame)
        tapView?.delegate = self
        view.addSubview(tapView!)
        view.bringSubviewToFront(tapView!)
    }

    func keyboardWillHide() {
    }

    deinit {
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
    }
}

extension ThisViewController: HandleViewTapDelegate {
    func handleTap() {

        //code on tap not on keyboard
        view.endEditing(true)

        tapView?.removeFromSuperview()
        tapView = nil
    }
}

protocol HandleViewTapDelegate {
    func handleTap()
}

class ClickThroughView: UIView {
    var delegate: HandleViewTapDelegate?

    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
        delegate?.handleTap()
        return false
    }
}