반응형
키보드가 나타날 때 UIScrollView를 어떻게 스크롤합니까?
내 코드에 문제가 있습니다. UIScrollView편집 할 때 UITextField키보드 팝으로 숨겨야 하는을 이동하려고합니다 .
코드에서 '스크롤 업'하는 방법을 모르기 때문에 지금 메인 프레임을 이동하고 있습니다. 그래서 약간의 코드를 작성했는데 잘 작동하지만 UItextfield를 편집 UITextField하고 'return'버튼을 누르지 않고 다른 필드로 전환 하면 기본보기가 waaayyyyy 위로 올라갑니다.
나는 한 NSLog()당신이 아래에 볼 수있는 내 변수의 크기, 거리, textFieldRect.origin.y과 함께합니다. 두 개 UITextField를 같은 위치 (y 원점)에 놓고이 특정 '스위치'(return 키를 누르지 않음)를 수행하면 동일한 숫자가 표시되는 반면 내 코드는 첫 번째 UITextField편집에서는 잘 작동 하지만 두 번째 편집에서는 작동하지 않습니다.
이것 좀 봐:
- (void)textFieldDidBeginEditing:(UITextField *)textField {
{
int size;
CGRect textFieldRect = [self.view.window convertRect:textField.bounds fromView:textField];
size = textFieldRect.origin.y + textFieldRect.size.height;
if (change == FALSE)
{
size = size - distance;
}
if (size < PORTRAIT_KEYBOARD_HEIGHT)
{
distance = 0;
}
else if (size > PORTRAIT_KEYBOARD_HEIGHT)
{
distance = size - PORTRAIT_KEYBOARD_HEIGHT + 5; // +5 px for more visibility
}
NSLog(@"origin %f", textFieldRect.origin.y);
NSLog(@"size %d", size);
NSLog(@"distance %d", distance);
CGRect viewFrame = self.view.frame;
viewFrame.origin.y -= distance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
change = FALSE;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
change = TRUE;
CGRect viewFrame = self.view.frame;
viewFrame.origin.y += distance;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:KEYBOARD_ANIMATION_DURATION];
[self.view setFrame:viewFrame];
[UIView commitAnimations];
}
어떤 아이디어?
Apple에서 권장하는 방법 contentInset은 UIScrollView. .NET Framework를 엉망으로 만들 필요가 없기 때문에 매우 우아한 솔루션 contentSize입니다. 다음 코드는 이 문제의 처리에 대해 설명 하는 Keyboard Programming Guide 에서 복사 한 것입니다. 당신은 그것을 살펴 봐야합니다.
// Call this method somewhere in your view controller setup code.
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y-kbSize.height);
[scrollView setContentOffset:scrollPoint animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}
Swift 버전 :
func registerForKeyboardNotifications() {
NotificationCenter.default.addObserver(self, selector: #selector(onKeyboardAppear(_:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(onKeyboardDisappear(_:)), name: NSNotification.Name.UIKeyboardDidHide, object: nil)
}
// Don't forget to unregister when done
deinit {
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardDidHide, object: nil)
}
@objc func onKeyboardAppear(_ notification: NSNotification) {
let info = notification.userInfo!
let rect: CGRect = info[UIKeyboardFrameBeginUserInfoKey] as! CGRect
let kbSize = rect.size
let insets = UIEdgeInsetsMake(0, 0, kbSize.height, 0)
scrollView.contentInset = insets
scrollView.scrollIndicatorInsets = insets
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
var aRect = self.view.frame;
aRect.size.height -= kbSize.height;
let activeField: UITextField? = [addressTextView, servicePathTextView, usernameTextView, passwordTextView].first { $0.isFirstResponder }
if let activeField = activeField {
if aRect.contains(activeField.frame.origin) {
let scrollPoint = CGPoint(x: 0, y: activeField.frame.origin.y-kbSize.height)
scrollView.setContentOffset(scrollPoint, animated: true)
}
}
}
@objc func onKeyboardDisappear(_ notification: NSNotification) {
scrollView.contentInset = UIEdgeInsets.zero
scrollView.scrollIndicatorInsets = UIEdgeInsets.zero
}
나는 Xcode 7 (베타 6)에서 iOS9 용 Swift 2.0으로 이것을 구현했으며 여기서 잘 작동합니다.
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
registerKeyboardNotifications()
}
func registerKeyboardNotifications() {
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name: UIKeyboardWillHideNotification, object: nil)
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo!
let keyboardSize = userInfo.objectForKey(UIKeyboardFrameBeginUserInfoKey)!.CGRectValue.size
let contentInsets = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
var viewRect = view.frame
viewRect.size.height -= keyboardSize.height
if CGRectContainsPoint(viewRect, textField.frame.origin) {
let scrollPoint = CGPointMake(0, textField.frame.origin.y - keyboardSize.height)
scrollView.setContentOffset(scrollPoint, animated: true)
}
}
func keyboardWillHide(notification: NSNotification) {
scrollView.contentInset = UIEdgeInsetsZero
scrollView.scrollIndicatorInsets = UIEdgeInsetsZero
}
Swift 3 용으로 편집 됨
당신은 단지 설정해야 할 것 같다 contentInset및 scrollIndicatorInset스위프트 3, 스크롤이 / contentOffset이 자동으로 수행됩니다 ..
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
registerKeyboardNotifications()
}
func registerKeyboardNotifications() {
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardWillShow(notification:)),
name: NSNotification.Name.UIKeyboardWillShow,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardWillHide(notification:)),
name: NSNotification.Name.UIKeyboardWillHide,
object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo! as NSDictionary
let keyboardInfo = userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue
let keyboardSize = keyboardInfo.cgRectValue.size
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
}
func keyboardWillHide(notification: NSNotification) {
scrollView.contentInset = .zero
scrollView.scrollIndicatorInsets = .zero
}
여기에있는 모든 대답은 풍경 가능성을 잊은 것 같습니다. 장치를 가로보기로 회전 할 때이 작업을 수행하려면 문제가 발생합니다.
여기서 트릭은 뷰가 방향을 인식하지만 키보드는 인식하지 않는다는 것입니다. 이것은 가로 모드에서 키보드 너비는 실제로 높이이며 그 반대의 경우도 마찬가지입니다.
콘텐츠 삽입을 변경하는 Apple 권장 방법을 수정하고 가로 방향을 지원하려면 다음을 사용하는 것이 좋습니다.
// Call this method somewhere in your view controller setup code.
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
}
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGSize keyboardSize = [[[notif userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight ) {
CGSize origKeySize = keyboardSize;
keyboardSize.height = origKeySize.width;
keyboardSize.width = origKeySize.height;
}
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0);
scroller.contentInset = contentInsets;
scroller.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
// Your application might not need or want this behavior.
CGRect rect = scroller.frame;
rect.size.height -= keyboardSize.height;
NSLog(@"Rect Size Height: %f", rect.size.height);
if (!CGRectContainsPoint(rect, activeField.frame.origin)) {
CGPoint point = CGPointMake(0, activeField.frame.origin.y - keyboardSize.height);
NSLog(@"Point Height: %f", point.y);
[scroller setContentOffset:point animated:YES];
}
}
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
}
여기서 주목해야 할 부분은 다음과 같습니다.
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGSize keyboardSize = [[[notif userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight ) {
CGSize origKeySize = keyboardSize;
keyboardSize.height = origKeySize.width;
keyboardSize.width = origKeySize.height;
}
장치가 어떤 방향에 있는지 감지합니다. 가로 모드 인 경우 keyboardSize 변수의 너비와 높이 값을 '스왑'하여 올바른 값이 각 방향에서 사용되도록합니다.
Swift 4 솔루션 :
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
registerKeyboardNotifications()
}
func registerKeyboardNotifications() {
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardWillShow(notification:)),
name: NSNotification.Name.UIKeyboardWillShow,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardWillHide(notification:)),
name: NSNotification.Name.UIKeyboardWillHide,
object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self)
}
@objc func keyboardWillShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo! as NSDictionary
let keyboardInfo = userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue
let keyboardSize = keyboardInfo.cgRectValue.size
let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
}
@objc func keyboardWillHide(notification: NSNotification) {
scrollView.contentInset = .zero
scrollView.scrollIndicatorInsets = .zero
}
이 물건을 위해 많은 코딩이 필요하지 않습니다. 아래 코드처럼 매우 쉽습니다.
이 이미지와 같이 nib에서 UIScrollview에 모든 텍스트 파일이 있습니다.
YourViewController.h
@interface cntrInquiryViewController : UIViewController<UIScrollViewDelegate,UITextFieldDelegate>
{
IBOutlet UITextField *txtName;
IBOutlet UITextField *txtEmail;
IBOutlet UIScrollView *srcScrollView;
}
@end
nib에서 IBOutlet을 연결하고 NIB에서 UItextfiled 및 scrollview delegate의 각 대리자를 연결합니다.
-(void)viewWillAppear:(BOOL)animated
{
srcScrollView.contentSize = CGSizeMake(320, 500);
[super viewWillAppear:YES];
}
-(void)textFieldDidBeginEditing:(FMTextField *)textField
{
[srcScrollView setContentOffset:CGPointMake(0,textField.center.y-140) animated:YES];//you can set your y cordinate as your req also
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
[srcScrollView setContentOffset:CGPointMake(0,0) animated:YES];
return YES;
}
참고 텍스트로 제출 된 델리게이트가 연결되지 않은 경우 어떤 방법도 작동하지 않는 경우 모든 iBOulate 및 델리게이트가 올바르게 연결되었는지 확인하십시오.
iOS에서 자동 레이아웃과 함께 UIScrollView를 사용 하는 Swift + Using UIScrollView로 기록 된 Apple의 권장 사항 ( 링크 1 , 링크 2 , 링크 3 ) :
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet var t1: UITextField!
@IBOutlet var t2: UITextField!
@IBOutlet var t3: UITextField!
@IBOutlet var t4: UITextField!
@IBOutlet var srcScrollView: UIScrollView!
@IBOutlet var contentView: UIView!
var contentViewCoordinates: CGPoint!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
/* Constraints on content view */
let leftConstraint = NSLayoutConstraint(item:self.contentView,
attribute:NSLayoutAttribute.Leading,
relatedBy:NSLayoutRelation.Equal,
toItem:self.view,
attribute:NSLayoutAttribute.Left,
multiplier:1.0,
constant:0)
self.view.addConstraint(leftConstraint)
let rightConstraint = NSLayoutConstraint(item:self.contentView,
attribute:NSLayoutAttribute.Trailing,
relatedBy:NSLayoutRelation.Equal,
toItem:self.view,
attribute:NSLayoutAttribute.Right,
multiplier:1.0,
constant:0)
self.view.addConstraint(rightConstraint)
/* Tap gesture */
let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "hideKeyboard")
// prevents the scroll view from swallowing up the touch event of child buttons
tapGesture.cancelsTouchesInView = false
srcScrollView.addGestureRecognizer(tapGesture)
/* Save content view coordinates */
contentViewCoordinates = contentView.frame.origin
}
func hideKeyboard() {
t1.resignFirstResponder()
t2.resignFirstResponder()
t3.resignFirstResponder()
t4.resignFirstResponder()
}
var activeField: UITextField?
func textFieldDidBeginEditing(textField: UITextField) {
activeField = textField
}
func textFieldDidEndEditing(textField: UITextField) {
activeField = nil
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
let center = NSNotificationCenter.defaultCenter()
center.addObserver(self, selector: "keyboardOnScreen:", name: UIKeyboardDidShowNotification, object: nil)
center.addObserver(self, selector: "keyboardOffScreen:", name: UIKeyboardDidHideNotification, object: nil)
}
func keyboardOnScreen(notification: NSNotification){
// Retrieve the size and top margin (inset is the fancy word used by Apple)
// of the keyboard displayed.
let info: NSDictionary = notification.userInfo!
let kbSize = info.valueForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue().size
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize!.height, 0.0)
srcScrollView.contentInset = contentInsets
srcScrollView.scrollIndicatorInsets = contentInsets
var aRect: CGRect = self.view.frame
aRect.size.height -= kbSize!.height
//you may not need to scroll, see if the active field is already visible
if (CGRectContainsPoint(aRect, activeField!.frame.origin) == false) {
let scrollPoint:CGPoint = CGPointMake(0.0, activeField!.frame.origin.y - kbSize!.height)
srcScrollView.setContentOffset(scrollPoint, animated: true)
}
}
// func keyboardOnScreen(aNotification: NSNotification) {
// let info: NSDictionary = aNotification.userInfo!
// let kbSize = info.valueForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue().size
//
// var bkgndRect: CGRect! = activeField?.superview?.frame
//
// bkgndRect.size.height += kbSize!.height
//
// activeField?.superview?.frame = bkgndRect
//
// srcScrollView.setContentOffset(CGPointMake(0.0, activeField!.frame.origin.y - kbSize!.height), animated: true)
// }
func keyboardOffScreen(notification: NSNotification){
let contentInsets:UIEdgeInsets = UIEdgeInsetsZero
srcScrollView.contentInset = contentInsets
srcScrollView.scrollIndicatorInsets = contentInsets
self.srcScrollView.setContentOffset(CGPointMake(0, -self.view.frame.origin.y/2), animated: true)
}
}
Apple 코드에서 업데이트 할 유일한 것은 부드러운 전환을 제공하기 위해 keyboardWillBeHidden : 메서드입니다.
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
UIEdgeInsets contentInsets = UIEdgeInsetsZero;
[UIView animateWithDuration:0.4 animations:^{
self.scrollView.contentInset = contentInsets;
}];
self.scrollView.scrollIndicatorInsets = contentInsets;
}
다음은 스크롤 뷰 속성을 변경하므로 탐색 컨트롤러 내의 뷰 컨트롤러에서도 작동 하는 Swift 3 호환 답변 contentInset.top입니다.
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.registerKeyboardNotifications()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.unregisterKeyboardNotifications()
}
func registerKeyboardNotifications() {
NotificationCenter.default.addObserver(self, selector: #selector(LoginViewController.keyboardDidShow(notification:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(LoginViewController.keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
func unregisterKeyboardNotifications() {
NotificationCenter.default.removeObserver(self)
}
func keyboardDidShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo! as NSDictionary
let keyboardInfo = userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue
let keyboardSize = keyboardInfo.cgRectValue.size
// Get the existing contentInset for the scrollView and set the bottom property to be the height of the keyboard
var contentInset = self.scrollView.contentInset
contentInset.bottom = keyboardSize.height
self.scrollView.contentInset = contentInset
self.scrollView.scrollIndicatorInsets = contentInset
}
func keyboardWillHide(notification: NSNotification) {
var contentInset = self.scrollView.contentInset
contentInset.bottom = 0
self.scrollView.contentInset = contentInset
self.scrollView.scrollIndicatorInsets = UIEdgeInsets.zero
}
위의 답변이 구식임을 확인했습니다. 스크롤 할 때도 완벽하지 않습니다.
여기에 빠른 버전이 있습니다.
여유 공간없이 textField 바로 아래로 스크롤됩니다. 그리고 그것은 처음 등장했던 방식으로 복원 될 것입니다.
//add observer
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ARVHttpPlayVC.keyboardDidShow(_:)), name: UIKeyboardDidShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ARVHttpPlayVC.keyboardDidHide(_:)), name: UIKeyboardDidHideNotification, object: nil)
}
func keyboardDidShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo!
let keyboardSize = userInfo.objectForKey(UIKeyboardFrameEndUserInfoKey)!.CGRectValue.size
let difference = keyboardSize.height - (self.view.frame.height - inputTextField.frame.origin.y - inputTextField.frame.size.height)
if difference > 0 {
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = difference
self.scrollView.contentInset = contentInset
let scrollPoint = CGPointMake(0, difference)
self.scrollView.setContentOffset(scrollPoint, animated: true)
}
}
func keyboardDidHide(notification: NSNotification) {
let contentInset:UIEdgeInsets = UIEdgeInsetsZero
self.scrollView.contentInset = contentInset
}
//remove observer
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
이것이 제가 사용해온 것입니다. 간단하고 잘 작동합니다.
#pragma mark - Scrolling
-(void)scrollElement:(UIView *)view toPoint:(float)y
{
CGRect theFrame = view.frame;
float orig_y = theFrame.origin.y;
float diff = y - orig_y;
if (diff < 0)
[self scrollToY:diff];
else
[self scrollToY:0];
}
-(void)scrollToY:(float)y
{
[UIView animateWithDuration:0.3f animations:^{
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
self.view.transform = CGAffineTransformMakeTranslation(0, y);
}];
}
UITextField델리게이트 호출 textFieldDidBeginEditing:을 사용 하여 뷰를 위로 이동하고 알림 관찰자를 추가하여 키보드가 숨겨 질 때 뷰를 정상으로 되돌립니다.
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
if (self.view.frame.origin.y == 0)
[self scrollToY:-90.0]; // y can be changed to your liking
}
-(void)keyboardWillHide:(NSNotification*)note
{
[self scrollToY:0];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
이것은 Swift 에서 개선 된 최종 코드입니다.
//MARK: UITextFieldDelegate
func textFieldDidBeginEditing(textField: UITextField!) { //delegate method
self.textField = textField
}
func textFieldShouldReturn(textField: UITextField!) -> Bool { //delegate method
textField.resignFirstResponder()
return true
}
//MARK: Keyboard handling
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
unregisterKeyboardNotifications()
}
func registerKeyboardNotifications() {
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(UCProfileSettingsViewController.keyboardDidShow(_:)), name: UIKeyboardDidShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(UCProfileSettingsViewController.keyboardWillHide(_:)), name: UIKeyboardWillHideNotification, object: nil)
}
func unregisterKeyboardNotifications() {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardDidShow(notification: NSNotification) {
let userInfo: NSDictionary = notification.userInfo!
let keyboardSize = userInfo.objectForKey(UIKeyboardFrameBeginUserInfoKey)!.CGRectValue.size
let contentInsets = UIEdgeInsetsMake(0, 0, keyboardSize.height, 0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
var viewRect = self.view.frame
viewRect.size.height -= keyboardSize.height
let relativeFieldFrame: CGRect = textField.convertRect(textField.frame, toView: self.view)
if CGRectContainsPoint(viewRect, relativeFieldFrame.origin) {
let scrollPoint = CGPointMake(0, relativeFieldFrame.origin.y - keyboardSize.height)
scrollView.setContentOffset(scrollPoint, animated: true)
}
}
func keyboardWillHide(notification: NSNotification) {
scrollView.contentInset = UIEdgeInsetsZero
scrollView.scrollIndicatorInsets = UIEdgeInsetsZero
}
Swift 3에서이 코드를 사용해보세요.
override func viewDidAppear(_ animated: Bool) {
setupViewResizerOnKeyboardShown()
}
func setupViewResizerOnKeyboardShown() {
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardWillShowForResizing),
name: Notification.Name.UIKeyboardWillShow,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardWillHideForResizing),
name: Notification.Name.UIKeyboardWillHide,
object: nil)
}
func keyboardWillShowForResizing(notification: Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let window = self.view.window?.frame {
// We're not just minusing the kb height from the view height because
// the view could already have been resized for the keyboard before
self.view.frame = CGRect(x: self.view.frame.origin.x,
y: self.view.frame.origin.y,
width: self.view.frame.width,
height: window.origin.y + window.height - keyboardSize.height)
} else {
debugPrint("We're showing the keyboard and either the keyboard size or window is nil: panic widely.")
}
}
func keyboardWillHideForResizing(notification: Notification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
let viewHeight = self.view.frame.height
self.view.frame = CGRect(x: self.view.frame.origin.x,
y: self.view.frame.origin.y,
width: self.view.frame.width,
height: viewHeight) //viewHeight + keyboardSize.height
} else {
debugPrint("We're about to hide the keyboard and the keyboard size is nil. Now is the rapture.")
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
UIToolbar 및 UITabBar의 가능한 높이를 고려하는 Swift 4.2 솔루션입니다.
private func setupKeyboardNotifications() {
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIControl.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIControl.keyboardWillHideNotification, object: nil)
}
@objc func keyboardWillShow(_ notification: Notification) {
let userInfo: NSDictionary = notification.userInfo! as NSDictionary
let keyboardSize = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue.size
let tabbarHeight = tabBarController?.tabBar.frame.size.height ?? 0
let toolbarHeight = navigationController?.toolbar.frame.size.height ?? 0
let bottomInset = keyboardSize.height - tabbarHeight - toolbarHeight
scrollView.contentInset.bottom = bottomInset
scrollView.scrollIndicatorInsets.bottom = bottomInset
}
@objc func keyboardWillHide(_ notification: Notification) {
scrollView.contentInset = .zero
scrollView.scrollIndicatorInsets = .zero
}
그리고 iOS 9 미만을 대상으로하는 경우 언젠가 관찰자 등록을 취소해야합니다 ( Joe에게 감사합니다 )
이렇게하겠습니다. 많은 코드이지만 현재 포커스가있는 textField가 '사용 가능한 공간'의 세로 중앙에 있는지 확인합니다.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
- (void)keyboardWillShow:(NSNotification *)notification {
NSDictionary *info = [notification userInfo];
NSValue *keyBoardEndFrame = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGSize keyboardSize = [keyBoardEndFrame CGRectValue].size;
self.keyboardSize = keyboardSize;
[self adjustScrollViewOffsetToCenterTextField:self.currentTextField];
}
- (void)keyboardWillHide:(NSNotification *)notification {
self.keyboardSize = CGSizeZero;
}
- (IBAction)textFieldGotFocus:(UITextField *)sender {
sender.inputAccessoryView = self.keyboardAccessoryView;
self.currentTextField = sender;
[self adjustScrollViewOffsetToCenterTextField:sender];
}
- (void)adjustScrollViewOffsetToCenterTextField:(UITextField *)textField
{
CGRect textFieldFrame = textField.frame;
float keyboardHeight = MIN(self.keyboardSize.width, self.keyboardSize.height);
float visibleScrollViewHeight = self.scrollView.frame.size.height - keyboardHeight;
float offsetInScrollViewCoords = (visibleScrollViewHeight / 2) - (textFieldFrame.size.height / 2);
float scrollViewOffset = textFieldFrame.origin.y - offsetInScrollViewCoords;
[UIView animateWithDuration:.3 delay:0 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
self.scrollView.contentOffset = CGPointMake(self.scrollView.contentOffset.x, scrollViewOffset);
}completion:NULL];
}
you'll need these two properties in your @interface...
@property (nonatomic, assign) CGSize keyboardSize;
@property (nonatomic, strong) UITextField *currentTextField;
주의 - (IBAction)textFieldGotFocus:조치가 모든에 textField의에 매여 DidBeginEditing상태입니다.
또한 키보드 알림에서 애니메이션 지속 시간을 가져와 고정 값 대신 scrollview 애니메이션에 사용하는 것이 조금 더 좋을 것입니다. 그러나 저를 고소하십시오.
이 작업을 수행하기 위해 실제로 UIScrollView가 필요하지 않습니다. 이 코드를 사용했으며 나를 위해 작동합니다.
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if (textField==_myTextField)
{
[self keyBoardAppeared];
}
return true;
}
-(void)textFieldDidEndEditing:(UITextField *)textField {
if (textField==_myTextField)
{
[self keyBoardDisappeared];
}
}
-(void) keyBoardAppeared
{
CGRect frame = self.view.frame;
[UIView animateWithDuration:0.3
delay:0
options: UIViewAnimationCurveEaseOut
animations:^{
self.view.frame = CGRectMake(frame.origin.x, frame.origin.y-215, frame.size.width, frame.size.height);
}
completion:^(BOOL finished){
}];
}
-(void) keyBoardDisappeared
{
CGRect frame = self.view.frame;
[UIView animateWithDuration:0.3
delay:0
options: UIViewAnimationCurveEaseOut
animations:^{
self.view.frame = CGRectMake(frame.origin.x, frame.origin.y+215, frame.size.width, frame.size.height);
}
completion:^(BOOL finished){
}];
}
당신은 속성을 사용하여 스크롤 할 수 있습니다 contentOffset에 UIScrollView, 예를 들면,
CGPoint offset = scrollview.contentOffset;
offset.y -= KEYBOARD_HEIGHT + 5;
scrollview.contentOffset = offset;
애니메이션 스크롤을 수행하는 방법도 있습니다.
두 번째 편집이 올바르게 스크롤되지 않는 이유는 편집이 시작될 때마다 새 키보드가 나타날 것이라고 가정하기 때문일 수 있습니다. "키보드"표시 위치를 이미 조정했는지 확인하고 되돌리기 전에 키보드 가시성을 확인하십시오.
더 나은 해결책은 키보드 알림을 수신하는 것입니다. 예 :
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
나는 그것이 지금 오래된 질문이라는 것을 알고 있지만 다른 사람들에게 도움이 될 것이라고 생각했습니다. 내가 가지고있는 몇 가지 앱에 대해 좀 더 쉽게 구현할 수있는 것을 원했기 때문에 이에 대한 수업을 만들었습니다. 원하는 경우 여기에서 다운로드 할 수 있습니다. https://github.com/sdernley/iOSTextFieldHandler
모든 UITextField가 self의 델리게이트를 갖도록 설정하는 것만 큼 간단합니다.
textfieldname.delegate = self;
그런 다음 scrollView 및 제출 버튼의 이름으로 뷰 컨트롤러에 추가하십시오.
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
[iOSTextFieldHandler TextboxKeyboardMover:containingScrollView tf:textField btn:btnSubmit];
}
다음은 작동하는 솔루션입니다 (5 단계)
1 단계 : 관찰자를 추가하여 UITEXTFIELD 또는 UITEXTVIEW ShoudBeginEditing (객체가 초기화되거나 ViewDidLoad.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateActiveField:)
name:@"UPDATE_ACTIVE_FIELD" object:nil];
2 단계 : UITEXTFIELD 또는 UITEXTVIEW의 OBJECT로 ..ShouldBeginEditing시 알림 게시
-(BOOL)textViewShouldBeginEditing:(UITextView *)textView {
[[NSNotificationCenter defaultCenter] postNotificationName:@"UPDATE_ACTIVE_FIELD"
object:textView];
return YES;
}
Step3 : (Step1 호출) 현재 UITEXTFIELD 또는 UITEXTVIEW를 할당하는 메서드
-(void) updateActiveField: (id) sender {
activeField = [sender object];
}
4 단계 : 키보드 관찰자 UIKeyboardWillShowNotification 추가 (1 단계와 동일한 위치)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
name:UIKeyboardDidShowNotification object:nil];
및 방법 :
// Called when the UIKeyboardDidShowNotification is sent.
- (void)keyboardWasShown:(NSNotification*)aNotification
{
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
_currentEdgeInsets = self.layoutPanel.contentInset; // store current insets to restore them later
self.layoutPanel.contentInset = contentInsets;
self.layoutPanel.scrollIndicatorInsets = contentInsets;
// If active text field is hidden by keyboard, scroll it so it's visible
CGRect aRect = self.view.frame;
aRect.size.height -= kbSize.height;
UIWindow *window = [[UIApplication sharedApplication] keyWindow];
CGPoint p = [activeField convertPoint:activeField.bounds.origin toView:window];
if (!CGRectContainsPoint(aRect, p) ) {
CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y +kbSize.height);
[self.layoutPanel setContentOffset:scrollPoint animated:YES];
self.layoutPanel.scrollEnabled = NO;
}
}
5 단계 : 키보드 관찰자 UIKeyboardWillHideNotification 추가 (1 단계와 동일한 위치)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillBeHidden:)
name:UIKeyboardWillHideNotification object:nil];
및 방법 :
// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
self.layoutPanel.contentInset = _currentEdgeInsets;
self.layoutPanel.scrollIndicatorInsets = _currentEdgeInsets;
self.layoutPanel.scrollEnabled = YES;
}
관찰자를 제거하는 것을 잊지 마십시오!
너무 많이 계산하지 않으려면 다음 확장을 사용하십시오.
func scrollSubviewToBeVisible(subview: UIView, animated: Bool) {
let visibleFrame = UIEdgeInsetsInsetRect(self.bounds, self.contentInset)
let subviewFrame = subview.convertRect(subview.bounds, toView: self)
if (!CGRectContainsRect(visibleFrame, subviewFrame)) {
self.scrollRectToVisible(subviewFrame, animated: animated)
}
}
UITextField를 항상 표시하고 싶을 수도 있습니다.
func textViewDidChange(textView: UITextView) {
self.scrollView?.scrollSubviewToBeVisible(textView, animated: false)
}
나는 Sudheer Palchuri https://stackoverflow.com/users/2873919/sudheer-palchuri https://stackoverflow.com/a/32583809/6193496에서 제공 한이 답변을 사용했습니다.
ViewDidLoad에서 알림을 등록합니다.
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(DetailsViewController.keyboardWillShow(_:)), name:UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(DetailsViewController.keyboardWillHide(_:)), name:UIKeyboardWillHideNotification, object: nil)
키보드가 나타날 때 자동 스크롤을 수행하는 관찰자 방법을 아래에 추가하십시오.
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func keyboardWillShow(notification:NSNotification){
var userInfo = notification.userInfo!
var keyboardFrame:CGRect = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
keyboardFrame = self.view.convertRect(keyboardFrame, fromView: nil)
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = keyboardFrame.size.height
self.scrollView.contentInset = contentInset
}
func keyboardWillHide(notification:NSNotification){
var contentInset:UIEdgeInsets = UIEdgeInsetsZero
self.scrollView.contentInset = contentInset
}
내 솔루션에는 4 단계가 있습니다.
-1 단계 : 키보드가 나타날 때 기능이 청취합니다.
- (void)keyboardWasShown:(NSNotification *)notification {
// Get the size of the keyboard.
CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
//top: 64 for navigation bar, 0 for without navigation
UIEdgeInsets contentInsets = UIEdgeInsetsMake(64, 0, keyboardSize.height, 0);
_scrollView.contentInset = contentInsets;
_scrollView.scrollIndicatorInsets = contentInsets;
}
-2 단계 : 키보드가 사라지면 기능이 청취
- (void)keyboardWillHide:(NSNotification *)notification {
//top: 64 for navigatiob bar
UIEdgeInsets contentInsets = UIEdgeInsetsMake(64, 0, 0, 0);
[_editScrollView setContentInset: contentInsets];
[_editScrollView setScrollIndicatorInsets: contentInsets];
}
-3 단계 : 알림 센터에 다음 기능을 추가합니다.
- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
-4 단계 : 뷰 컨트롤러가 사라질 때 청취 제거
- (void)viewDidDisappear:(BOOL)animated{
[super viewDidDisappear:animated];
[[NSNotificationCenter defaultCenter]removeObserver:self name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter]removeObserver:self name:UIKeyboardWillHideNotification object:nil];
}
가장 쉬운 솔루션 중 하나는 다음 프로토콜을 사용하는 것입니다.
protocol ScrollViewKeyboardDelegate: class {
var scrollView: UIScrollView? { get set }
func registerKeyboardNotifications()
func unregisterKeyboardNotifications()
}
extension ScrollViewKeyboardDelegate where Self: UIViewController {
func registerKeyboardNotifications() {
NotificationCenter.default.addObserver(
forName: UIResponder.keyboardWillChangeFrameNotification,
object: nil,
queue: nil) { [weak self] notification in
self?.keyboardWillBeShown(notification)
}
NotificationCenter.default.addObserver(
forName: UIResponder.keyboardWillHideNotification,
object: nil,
queue: nil) { [weak self] notification in
self?.keyboardWillBeHidden(notification)
}
}
func unregisterKeyboardNotifications() {
NotificationCenter.default.removeObserver(
self,
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil
)
NotificationCenter.default.removeObserver(
self,
name: UIResponder.keyboardWillHideNotification,
object: nil
)
}
func keyboardWillBeShown(_ notification: Notification) {
let info = notification.userInfo
let key = (info?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)
let aKeyboardSize = key?.cgRectValue
guard let keyboardSize = aKeyboardSize,
let scrollView = self.scrollView else {
return
}
let bottomInset = keyboardSize.height
scrollView.contentInset.bottom = bottomInset
scrollView.scrollIndicatorInsets.bottom = bottomInset
if let activeField = self.view.firstResponder {
let yPosition = activeField.frame.origin.y - bottomInset
if yPosition > 0 {
let scrollPoint = CGPoint(x: 0, y: yPosition)
scrollView.setContentOffset(scrollPoint, animated: true)
}
}
}
func keyboardWillBeHidden(_ notification: Notification) {
self.scrollView?.contentInset = .zero
self.scrollView?.scrollIndicatorInsets = .zero
}
}
extension UIView {
var firstResponder: UIView? {
guard !isFirstResponder else { return self }
return subviews.first(where: {$0.firstResponder != nil })
}
}
이 프로토콜을 사용하려면이를 준수하고 다음과 같이 컨트롤러에서 스크롤보기를 할당하기 만하면됩니다.
class MyViewController: UIViewController {
@IBOutlet var scrollViewOutlet: UIScrollView?
var scrollView: UIScrollView?
public override func viewDidLoad() {
super.viewDidLoad()
self.scrollView = self.scrollViewOutlet
self.scrollView?.isScrollEnabled = true
self.registerKeyboardNotifications()
}
extension MyViewController: ScrollViewKeyboardDelegate {}
deinit {
self.unregisterKeyboardNotifications()
}
}
반응형
'program tip' 카테고리의 다른 글
| 업데이트 후 Android 스튜디오의 리소스 오류 : 리소스를 찾을 수 없음 (0) | 2020.08.17 |
|---|---|
| GCD의 동시 대기열과 직렬 대기열 (0) | 2020.08.17 |
| 뷰 컨트롤러가 모달로 표시되는지 또는 탐색 스택에 푸시되었는지 확인 (0) | 2020.08.17 |
| Task Runner Explorer에서 작업을로드 할 수 없습니다. (0) | 2020.08.17 |
| 하나의 규칙 내에서 여러 클래스가있는 대상 요소 (0) | 2020.08.17 |