从另一个视图控制器中关闭键盘

Question

我正在使用SJSegmentedViewController来使我的视图控制器分段。

我有一个名为PlaceReviewsVC的视图控制器，我在其中添加了textView以供审阅。发表评论我发布Post的UIBarButtonItem酒吧按钮实例navigationItem.rightBarButtonItem在我的placeDetailSegmentController，这是SJSegmentedViewController的实例。

现在问题是当我点击发布按钮时，我无法解除键盘问题。

我试过以下代码在分段视图控制器中添加post按钮。

let headerVC = PlaceImagesVC.viewController()

let reviewVC = PlaceReviewsVC.viewController()
reviewVC.delegate = self
reviewVC.title = "Reviews"

let placeDetailSegmentController = SJSegmentedViewController()     
placeDetailSegmentController.delegate = self
placeDetailSegmentController.title = "Pedal Studio"
placeDetailSegmentController.headerViewController = headerVC
placeDetailSegmentController.segmentControllers = [reviewVC]
placeDetailSegmentController.headerViewHeight = 280
placeDetailSegmentController.selectedSegmentViewHeight = 2.0
placeDetailSegmentController.selectedSegmentViewColor = .white

let button = UIButton(type: .custom)
button.setImage(#imageLiteral(resourceName: "icon_back").withRenderingMode(.alwaysTemplate), for: .normal)
button.tintColor = .white
button.addTarget(self, action:#selector(backButtonTapped), for:.touchUpInside)
button.frame = CGRect(x: 0, y: 0, width: 20, height: 20)
button.contentMode = .scaleAspectFit
button.imageEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
let leftButton = UIBarButtonItem(customView: button)

placeDetailSegmentController.navigationItem.leftBarButtonItem = leftButton            

let btnPost = UIButton(type: .custom)
btnPost.setTitle("POST", for: .normal)
btnPost.addTarget(self, action:#selector(btnPostTapped), for:.touchUpInside)
btnPost.titleLabel?.setFont(Typography.getFont(.PoppinsMedium, size: 12.0), .white)
btnPost.setTitleColor(.menuColor, for: .normal)
btnPost.setTitleColor(.darkGray, for: .highlighted)
btnPost.contentMode = .scaleAspectFit
let rightButton = UIBarButtonItem(customView: btnPost)

placeDetailSegmentController.navigationItem.rightBarButtonItem = rightButton

self.navigationController?.pushViewController(placeDetailSegmentController, animated: true)

在btnPostTapped方法里面我写了下面的代码来解雇键盘。但没有奏效。

@objc func btnPostTapped() {
    self.view.endEditing(true)
}

如何将键盘从一个视图控制器关闭到另一个视图控制器？

Answer 1

您应该更改您的代码以解除键盘，如下所示：

@objc func btnPostTapped() {
    AppDelegate.shared.window?.endEditing(true)
}

我们的应用程序基础是window，因此当您在窗口上执行任何事件时，它将影响整个应用程序。我希望这能解决你的问题。

Answer 2

从任何地方隐藏键盘

UIApplication.shared.sendAction(#selector(UIApplication.resignFirstResponder), to: nil, from: nil, for: nil)

要么

从导航层次结构获取所需的viewcontroller实例并将键盘重新签名为：

requiredViewController.textField.resignFirstResponder()

要么

requiredViewController.view.endEditing(true)