当键盘出现Swift时，使用文本字段和按钮向上移动视图

Question

我知道有一些关于此主题的已发布问题，但没有一个有效。我有一个 tableview，在它下面有一个 UIView，其中包含一个文本字段和按钮。当我的键盘出现时，它覆盖了整个 UIView，使我无法单击“发送”。显示我的应用外观的图片：

目前，我的代码是：

 override func viewDidLoad() {
    super.viewDidLoad()
    inputTextField.delegate = self
    inputTextField.layer.cornerRadius = 5
    inputTextField.clipsToBounds = true
    sendButton.layer.cornerRadius = 5
    sendButton.clipsToBounds = true
    self.tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "TableViewCell")
    loadMsg()
    self.hideKeyboardWhenTappedAround()

}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    inputTextField.becomeFirstResponder()
}

当我的键盘出现时，我应该如何将 UIView 连同 UIView 包含的文本字段和按钮一起向上移动？

Answer 1

只需使用 POD 将 this 库添加到您的项目中即可。它会自动完成。你不必做任何其他事情。

像这样添加 pod

pod 'IQKeyboardManagerSwift'

在 AppDelegate.swift 中，只需导入 IQKeyboardManagerSwift 框架并启用 IQKeyboardManager。

import IQKeyboardManagerSwift

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

  IQKeyboardManager.shared.enable = true

  return true
 }
}

如需参考，请查看此网址，https://github.com/hackiftekhar/IQKeyboardManager

Answer 2

这里是解决方案，创建发送按钮视图的底部布局约束参考

@IBOutlet weak var bottomConstraint: NSLayoutConstraint!
@IBOutlet weak var sendbuttonView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(self, selector: #selector(handleKeyboardNotification), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(handleKeyboardNotification), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    }

    override func viewWillDisappear(_ animated: Bool) {
        NotificationCenter.default.removeObserver(self)
    }

    @objc func handleKeyboardNotification(_ notification: Notification) {

    if let userInfo = notification.userInfo {

        let keyboardFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue

        let isKeyboardShowing = notification.name == NSNotification.Name.UIKeyboardWillShow

        bottomConstraint?.constant = isKeyboardShowing ? -keyboardFrame!.height : 0

        UIView.animate(withDuration: 0.5, animations: { () -> Void in
            self.view.layoutIfNeeded()
        })
    }
}

Demo example

Answer 3

斯威夫特 4.2

在 viewDidLoad() 中

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboard(notification:)), name:UIResponder.keyboardWillChangeFrameNotification, object: nil)

方法

@objc func keyboard(notification:Notification) {
        guard let keyboardReact = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else{
            return
        }

        if notification.name == UIResponder.keyboardWillShowNotification ||  notification.name == UIResponder.keyboardWillChangeFrameNotification {
            self.view.frame.origin.y = -keyboardReact.height
        }else{
            self.view.frame.origin.y = 0
        }

    }

Answer 4

试试下面的代码

//Declare a delegate, assign your textField to the delegate and then include these methods

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
    return YES;
}


- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];

    [self.view endEditing:YES];
    return YES;
}


- (void)keyboardDidShow:(NSNotification *)notification
{
    // Assign new frame to your view 
    [self.view setFrame:CGRectMake(0,-110,320,460)]; //here taken -110 for example i.e. your view will be scrolled to -110. change its value according to your requirement.

}

-(void)keyboardDidHide:(NSNotification *)notification
{
    [self.view setFrame:CGRectMake(0,0,320,460)];
}

Answer 5

您可以通过将 View 向上移动 constraint 这里 actionBarPaddingBottomConstranit is Constraint connect to your Input View Bottom constraint Check image

在 ViewDidload 中：

 override func viewDidLoad() {
        super.viewDidLoad()
         self.keybordControl()
    }

扩展：

extension ViewController{

    func keybordControl(){
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)

        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)

    }


    @objc func keyboardWillShow(notification: Notification) {
        self.keyboardControl(notification, isShowing: true)
    }



    @objc func keyboardWillHide(notification: Notification) {
        self.keyboardControl(notification, isShowing: false)
    }



     private func keyboardControl(_ notification: Notification, isShowing: Bool) {

        /* Handle the Keyboard property of Default, Text*/

        var userInfo = notification.userInfo!
        let keyboardRect = (userInfo[UIKeyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue
        let curve = (userInfo[UIKeyboardAnimationCurveUserInfoKey]! as AnyObject).uint32Value

        let convertedFrame = self.view.convert(keyboardRect!, from: nil)
        let heightOffset = self.view.bounds.size.height - convertedFrame.origin.y
        let options = UIViewAnimationOptions(rawValue: UInt(curve!) << 16 | UIViewAnimationOptions.beginFromCurrentState.rawValue)
        let duration = (userInfo[UIKeyboardAnimationDurationUserInfoKey]! as AnyObject).doubleValue


        var  pureheightOffset : CGFloat = -heightOffset

        if isShowing {
           if #available(iOS 11.0, *) {
               pureheightOffset = pureheightOffset + view.safeAreaInsets.bottom
            }
        }
        self.actionBarPaddingBottomConstranit?.update(offset:pureheightOffset)

        UIView.animate(
            withDuration: duration!,
            delay: 0,
            options: options,
            animations: {
                self.view.layoutIfNeeded()

        },
            completion: { bool in

        })

    }
}

Answer 6

在 ViewDidLoad 中调用下面的方法：

func keyboardSettings(){
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardNotification(notification:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
        self.view.addGestureRecognizer(UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:))))
        let swipeDown = UISwipeGestureRecognizer(target: self.view , action : #selector(UIView.endEditing(_:)))
        swipeDown.direction = .down
        self.view.addGestureRecognizer(swipeDown)
    }

然后添加以下方法进行键盘配置：

@objc func keyboardNotification(notification: NSNotification) {

        if let userInfo = notification.userInfo {
            if let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue{
                if let duration:TimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue{

                    let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
                    let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIViewAnimationOptions.curveEaseInOut.rawValue
                    let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)

                    if (endFrame.origin.y) >= UIScreen.main.bounds.size.height {
                        self.const_ViewMessage_Bottom?.constant = 0.0
                    } else {
                        self.const_ViewMessage_Bottom?.constant = endFrame.size.height
                    }

                    UIView.animate(withDuration: duration,
                                   delay: TimeInterval(0),
                                   options: animationCurve,
                                   animations: { self.view.layoutIfNeeded() },
                                   completion: nil)
                }
            }
        }
    }

self.const_ViewMessage_Bottom 是带有文本框的 UIView 的底部约束。

Answer 7

具有一个可在所有 ViewController 中使用的扩展。创建一个空的 swift 文件，将这段代码复制到文件中

import UIKit

extension UIViewController {

    func keyboardCheck() {
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
    }

    @objc func keyboardWillShow(notification: NSNotification) {
        if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
            if self.view.frame.origin.y == 0 {
                self.view.frame.origin.y -= keyboardSize.height
            }
        }
    }

    @objc func keyboardWillHide(notification: NSNotification) {
        if self.view.frame.origin.y != 0 {
            self.view.frame.origin.y = 0
        }
    }

}

然后调用ViewDidLoad Usage里面的函数：

override func viewDidLoad() {
        super.viewDidLoad()

       self.keyboardCheck()
    }