답변:
Swift에서 :
UIKeyboardWillShowNotification
알림 을 구독하면 키보드 높이를 알 수 있습니다 . (표시되기 전에 높이가 무엇인지 알고 싶다고 가정합니다).
이 같은:
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(
self,
selector: #selector(keyboardWillShow),
name: NSNotification.Name.UIKeyboardWillShow,
object: nil
)
NotificationCenter.default.addObserver(
self,
selector: #selector(keyboardWillShow),
name: UIResponder.keyboardWillShowNotification,
object: nil
)
그런 다음 다음 keyboardWillShow
과 같은 기능 에서 높이에 액세스 할 수 있습니다 .
func keyboardWillShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo!
let keyboardFrame: NSValue = userInfo.valueForKey(UIKeyboardFrameEndUserInfoKey) as! NSValue
let keyboardRectangle = keyboardFrame.CGRectValue()
let keyboardHeight = keyboardRectangle.height
}
@objc func keyboardWillShow(_ notification: Notification) {
if let keyboardFrame: NSValue = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue {
let keyboardRectangle = keyboardFrame.cgRectValue
let keyboardHeight = keyboardRectangle.height
}
}
@objc func keyboardWillShow(_ notification: Notification) {
if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
let keyboardRectangle = keyboardFrame.cgRectValue
let keyboardHeight = keyboardRectangle.height
}
}
UIResponder.keyboardWillShowNotification
이름 비트에서
1- viewWillAppear
방법에 알림 등록 :
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: .UIKeyboardWillShow, object: nil)
2- 호출 할 방법 :
@objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardSize.height
print(keyboardHeight)
}
}
keyboardWillShow
매개 변수를 유형 Notification
으로 지정하여 Swift 3.0과 더 호환되도록 할 수도 있습니다 .
viewDidLoad
하는 것은 좋은 생각이 아닙니다. removeObserver
이 VC가 더 이상 표시되지 않을 때 알림 수신을 중지하도록 일치하는 호출을 어디에 배치 합니까? 에 알림 등록을 입력 viewWillAppear
한 다음 removeObserver
전화 를 입력하는 것이 좋습니다 .viewWillDisappear
Swift 4 및 제약
tableview에 하단 안전 영역을 기준으로 하단 제약 조건을 추가하십시오. 제 경우에는 제약 조건을 tableViewBottomLayoutConstraint라고합니다.
@IBOutlet weak var tableViewBottomLayoutConstraint: NSLayoutConstraint!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillAppear(notification:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillDisappear(notification:)), name: .UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow , object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide , object: nil)
}
@objc
func keyboardWillAppear(notification: NSNotification?) {
guard let keyboardFrame = notification?.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else {
return
}
let keyboardHeight: CGFloat
if #available(iOS 11.0, *) {
keyboardHeight = keyboardFrame.cgRectValue.height - self.view.safeAreaInsets.bottom
} else {
keyboardHeight = keyboardFrame.cgRectValue.height
}
tableViewBottomLayoutConstraint.constant = keyboardHeight
}
@objc
func keyboardWillDisappear(notification: NSNotification?) {
tableViewBottomLayoutConstraint.constant = 0.0
}
Swift 4.2 업데이트
private func setUpObserver() {
NotificationCenter.default.addObserver(self, selector: .keyboardWillShow, name: UIResponder.keyboardWillShowNotification, object: nil)
}
선택기 방법 :
@objc fileprivate func keyboardWillShow(notification:NSNotification) {
if let keyboardRectValue = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardRectValue.height
}
}
신장:
private extension Selector {
static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(notification:))
}
Swift 3.0 업데이트
private func setUpObserver() {
NotificationCenter.default.addObserver(self, selector: .keyboardWillShow, name: .UIKeyboardWillShow, object: nil)
}
선택기 방법 :
@objc fileprivate func keyboardWillShow(notification:NSNotification) {
if let keyboardRectValue = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardRectValue.height
}
}
신장:
private extension Selector {
static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(notification:))
}
팁
UIKeyboardDidShowNotification 또는 UIKeyboardWillShowNotification이 두 번 호출되고 다른 결과를 얻을 수 있습니다.이 문서에서는 두 번 호출 된 이유를 설명했습니다.
Swift 2.2에서
Swift 2.2는 선택자에 대한 문자열 사용을 중단하고 대신 새로운 구문 : #selector
.
다음과 같은 것 :
private func setUpObserver() {
NSNotificationCenter.defaultCenter().addObserver(self, selector: .keyboardWillShow, name: UIKeyboardWillShowNotification, object: nil)
}
선택기 방법 :
@objc private func keyboardWillShow(notification:NSNotification) {
let userInfo:NSDictionary = notification.userInfo!
let keyboardFrame:NSValue = userInfo.valueForKey(UIKeyboardFrameEndUserInfoKey) as! NSValue
let keyboardRectangle = keyboardFrame.CGRectValue()
let keyboardHeight = keyboardRectangle.height
editorBottomCT.constant = keyboardHeight
}
신장:
private extension Selector {
static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(_:))
}
여기에 더 짧은 버전 :
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight = keyboardSize.height
}
}
스위프트 4 .
가장 간단한 방법
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: .UIKeyboardWillShow, object: nil)
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight : Int = Int(keyboardSize.height)
print("keyboardHeight",keyboardHeight)
}
}
override func viewDidLoad() {
// Registering for keyboard notification.
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
}
/* UIKeyboardWillShowNotification. */
@objc internal func keyboardWillShow(_ notification : Notification?) -> Void {
var _kbSize:CGSize!
if let info = notification?.userInfo {
let frameEndUserInfoKey = UIResponder.keyboardFrameEndUserInfoKey
// Getting UIKeyboardSize.
if let kbFrame = info[frameEndUserInfoKey] as? CGRect {
let screenSize = UIScreen.main.bounds
//Calculating actual keyboard displayed size, keyboard frame may be different when hardware keyboard is attached (Bug ID: #469) (Bug ID: #381)
let intersectRect = kbFrame.intersection(screenSize)
if intersectRect.isNull {
_kbSize = CGSize(width: screenSize.size.width, height: 0)
} else {
_kbSize = intersectRect.size
}
print("Your Keyboard Size \(_kbSize)")
}
}
}
// 1 단계 :-NotificationCenter 등록
ViewDidLoad() {
self.yourtextfield.becomefirstresponder()
// Register your Notification, To know When Key Board Appears.
NotificationCenter.default.addObserver(self, selector: #selector(SelectVendorViewController.keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
// Register your Notification, To know When Key Board Hides.
NotificationCenter.default.addObserver(self, selector: #selector(SelectVendorViewController.keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
// 2 단계 :-키보드가 나타나거나 숨길 때이 메서드는 자동으로 호출됩니다.
func keyboardWillShow(notification:NSNotification) {
let userInfo:NSDictionary = notification.userInfo! as NSDictionary
let keyboardFrame:NSValue = userInfo.value(forKey: UIKeyboardFrameEndUserInfoKey) as! NSValue
let keyboardRectangle = keyboardFrame.cgRectValue
let keyboardHeight = keyboardRectangle.height
tblViewListData.frame.size.height = fltTblHeight-keyboardHeight
}
func keyboardWillHide(notification:NSNotification) {
tblViewListData.frame.size.height = fltTblHeight
}
Xcode 10에서 Swift 5 용으로 업데이트 된 ZAFAR007의 방법
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
}
@objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
let keyboardHeight : Int = Int(keyboardSize.height)
print("keyboardHeight",keyboardHeight)
}
}
나는 이것을해야했다. 이것은 약간의 해커 리입니다. 제안되지 않았습니다.
그러나 나는 이것이 매우 유용하다는 것을
알았습니다.
ViewController 확장 + 구조
import UIKit
struct viewGlobal{
static var bottomConstraint : NSLayoutConstraint = NSLayoutConstraint()
}
extension UIViewController{ //keyboardHandler
func hideKeyboardWhenTappedAround() {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))
tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
}
func listenerKeyboard(bottomConstraint: NSLayoutConstraint) {
viewGlobal.bottomConstraint = bottomConstraint
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
// Register your Notification, To know When Key Board Hides.
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
//Dismiss Keyboard
@objc func dismissKeyboard() {
view.endEditing(true)
}
@objc func keyboardWillShow(notification:NSNotification) {
let userInfo:NSDictionary = notification.userInfo! as NSDictionary
let keyboardFrame:NSValue = userInfo.value(forKey: UIResponder.keyboardFrameEndUserInfoKey) as! NSValue
let keyboardRectangle = keyboardFrame.cgRectValue
let keyboardHeight = keyboardRectangle.height
UIView.animate(withDuration: 0.5){
viewGlobal.bottomConstraint.constant = keyboardHeight
}
}
@objc func keyboardWillHide(notification:NSNotification) {
UIView.animate(withDuration: 0.5){
viewGlobal.bottomConstraint.constant = 0
}
}
}
사용법 :
최하위 제약 조건 얻기
@IBOutlet weak var bottomConstraint: NSLayoutConstraint! // default 0
viewDidLoad () 내에서 함수 호출
override func viewDidLoad() {
super.viewDidLoad()
hideKeyboardWhenTappedAround()
listenerKeyboard(bottomConstraint: bottomConstraint)
// Do any additional setup after loading the view.
}
이 도움을 바랍니다.
- 당신 키보드 것이다 이제 사용자 탭 외부 텍스트 필드의 가까운 자동차 와
- 가 위의 키보드 모두보기를 밀어 버린다 키보드가 나타날 때.
- 필요할 때 마다 dismissKeyboard ()를 사용할 수도 있습니다.
아래 코드를 사용합니다.
override func viewDidLoad() {
super.viewDidLoad()
self.registerObservers()
}
func registerObservers(){
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillAppear(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
@objc func keyboardWillAppear(notification: Notification){
if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
let keyboardRectangle = keyboardFrame.cgRectValue
let keyboardHeight = keyboardRectangle.height
self.view.transform = CGAffineTransform(translationX: 0, y: -keyboardHeight)
}
}
@objc func keyboardWillHide(notification: Notification){
self.view.transform = .identity
}