Swift

Question

我有一个与 this one 相同的问题，但由于我是编程新手并且只真正知道 swift 我想知道是否有人可以给我它在 swift 中的等价物.或者指出 swift 中我可能遗漏的另一个问题。

谢谢！

更新：这是我的视图控制器的基本内容，在我削减了一些内容以仅处理相关主题之后。重述问题。直到我单击 'doneButton' 到运行 createClient() 函数并导航回客户端页面以编辑新创建的客户端时，点击手势才会关闭键盘。

import UIKit
import CoreData
import Foundation

class NewClientTableViewController: UITableViewController, UINavigationControllerDelegate, UITextFieldDelegate {

let managedObjectContext = (UIApplication.sharedApplication().delegate as AppDelegate).managedObjectContext

@IBOutlet weak var nameTxt: UITextField!
@IBOutlet weak var ageTxt: UITextField!
@IBOutlet weak var phoneTxt: UITextField!
@IBOutlet weak var emailTxt: UITextField!
@IBOutlet weak var heightTxt: UITextField!
@IBOutlet weak var notesTxt: UITextView!

var client: Client? = nil

override func viewDidLoad() {
    super.viewDidLoad()

    if client != nil {

        nameTxt.text = client?.name
        ageTxt.text = client?.age
        heightTxt.text = client?.height
        phoneTxt.text = client?.phone
        emailTxt.text = client?.email
        notesTxt.text = client?.notes

        self.title = client?.name
        phoneTxt.delegate = self

        let tapGesture = UITapGestureRecognizer(target: self, action: Selector("hideKeyboard"))
        tapGesture.cancelsTouchesInView = true

        tableView.addGestureRecognizer(tapGesture)

    }
}

func hideKeyboard() {
    tableView.endEditing(true)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


@IBAction func doneButton(sender: AnyObject) {
    if client != nil {
        editClient()
    } else {
        createClient()
    }
    dismissViewController()

}

func editClient() {

    client?.name = nameTxt.text
    client?.age = ageTxt.text
    client?.height = heightTxt.text
    client?.phone = phoneTxt.text
    client?.email = emailTxt.text
    client?.notes = notesTxt.text
    client?.clientImage = UIImageJPEGRepresentation(contactImage.image, 1)

    managedObjectContext?.save(nil)
}

func createClient() {

    let entityDescription = NSEntityDescription.entityForName("Client", inManagedObjectContext: managedObjectContext!)
    let client = Client(entity: entityDescription!, insertIntoManagedObjectContext: managedObjectContext)

    if nameTxt.text == "" {
        client.name = "Untitled Client"
    } else {
        client.name = nameTxt.text
    }

    client.age = ageTxt.text
    client.height = heightTxt.text
    client.phone = phoneTxt.text
    client.email = emailTxt.text
    client.notes = notesTxt.text

    client.clientImage = UIImageJPEGRepresentation(contactImage.image, 1)

    managedObjectContext?.save(nil)

}

func dismissViewController() {
    navigationController?.popToRootViewControllerAnimated(true)
    }
}

Answer 1

override func viewDidLoad() {
    super.viewDidLoad()

    let tapGesture = UITapGestureRecognizer(target: self, action: Selector("hideKeyboard"))
    tapGesture.cancelsTouchesInView = true
    tableView.addGestureRecognizer(tapGesture)
}

func hideKeyboard() {
    tableView.endEditing(true)
}

将 Objective-C 代码翻译成 Swift 并不难。您只需要两种语言的基本知识。如果您是编程新手，我想您应该首先熟悉基础知识。

Answer 2

您也可以从情节提要中进行：

Answer 3

出于某种原因，@Isuru 的回答在我的应用程序 (XCode 7.2.1) 中崩溃了，幸运的是这只是一个小改动 - 只需删除 Selector() 调用：

override func viewDidLoad() {
    super.viewDidLoad()

    let tapGesture = UITapGestureRecognizer(target: self, action: "hideKeyboard")
    tapGesture.cancelsTouchesInView = true
    tableView.addGestureRecognizer(tapGesture)
}

func hideKeyboard() {
    tableView.endEditing(true)
}

Answer 4

覆盖 func viewDidLoad() { super.viewDidLoad()

    let tapGesture = UITapGestureRecognizer(target: self, action: Selector("hideKeyboard"))
    tapGesture.cancelsTouchesInView = true
    self.view.addGestureRecognizer(tapGesture)
}


func hideKeyboard()
{
    self.view.endEditing(true)
}

与上面对我不起作用的方法相比，这会很好用

Answer 5

正如@Ben 已经推荐的那样，您也可以通过编程方式执行此操作。只需将其放入您的 viewDidLoad()

tableView.keyboardDismissMode = .onDrag

Answer 6

Swift 4:

在 ViewDidLoad 上：

    override func viewDidLoad() {
        super.viewDidLoad()
self.yourTableView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:))))

    }

对应函数：

@objc func handleTap(_ sender: UITapGestureRecognizer) {
    if sender.state == .ended {
        // Do your thang here!
        self.view.endEditing(true)
        for textField in self.view.subviews where textField is UITextField {
            textField.resignFirstResponder()
        }
    }
    sender.cancelsTouchesInView = false
}

Answer 7

接受的答案在 XCode 13.1 上对我不起作用，所以我稍微更改了代码：

override func viewDidLoad() {
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.hideKeyboard))
    tapGesture.cancelsTouchesInView = true
    tableView.addGestureRecognizer(tapGesture)
}

@objc func hideKeyboard() {
    tableView.endEditing(true)
}

Swift - 点击手势关闭键盘 UITableView

Swift - Tap gesture to dismiss keyboard UITableView

uitableview

uitapgesturerecognizer