通过触摸UITableView背景关闭键盘

我有一个UITableView以UITextFields作为单元格。我想在UITableView触摸的背景时关闭键盘。我正在尝试通过创建UIButton的大小UITableView并将其放在的后面来实现此目的UITableView。唯一的问题是，UIButton即使触摸在UITableView上，也要捕获所有触摸。我究竟做错了什么？

谢谢！

可以通过创建UITapGestureRecognizer对象（默认情况下单击一次即可检测到“手势”，因此不需要进一步的自定义）轻松地完成此操作，并指定触发手势时的目标/动作，然后附加手势识别器对象到您的表格视图。

例如，也许在您的viewDidLoad方法中：

UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
[self.tableView addGestureRecognizer:gestureRecognizer];

该hideKeyboard方法可能如下所示：

- (void) hideKeyboard {
    [textField1 resignFirstResponder];
    [textField2 resignFirstResponder];
    ...
    ...
}

请注意，触摸UITextField对象内部时不会触发手势。但是会在UITableView背景，页脚视图，页眉视图和UILabels内部单元格等上触发它。

如果您进行以下设置，则UITapGestureRecognizer解决方案可用于表格单元格选择：

gestureRecognizer.cancelsTouchesInView = NO;

这是执行此操作的最佳方法。做这个

[self.view endEditing:YES];

要么

[[self.tableView superView] endEditing:YES];

您也可以从情节提要中执行此操作：

作为UITableView的子类UIScrollView，实现下面的一个委托方法提供了一种极其简单，快速的解决方案。resignFirstResponder由于视图层次结构会进行自省并找到当前响应者，并要求其退出响应者状态，因此甚至无需参与。

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    [self.view endEditing:YES];
}

并记住要添加UIScrollViewDelegate到头文件。

首先，通过添加来收听scrollViewWillBeginDragging您UIViewController的声音UIScrollViewDelegate：

在.h文件中：

@interface MyViewController : UIViewController <UIScrollViewDelegate> 

在.m文件中：

- (void)scrollViewWillBeginDragging:(UIScrollView *)activeScrollView {

    [self dismissKeyboard];

}

然后听其他交互：

- (void)setupKeyboardDismissTaps {

    UISwipeGestureRecognizer *swipeUpGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    swipeUpGestureRecognizer.cancelsTouchesInView = NO;
    swipeUpGestureRecognizer.direction = UISwipeGestureRecognizerDirectionUp;
    [self.tableView addGestureRecognizer:swipeUpGestureRecognizer];

    UISwipeGestureRecognizer *swipeDownGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    swipeDownGestureRecognizer.cancelsTouchesInView = NO;
    swipeDownGestureRecognizer.direction = UISwipeGestureRecognizerDirectionDown;
    [self.tableView addGestureRecognizer:swipeDownGestureRecognizer];

    UISwipeGestureRecognizer *swipeLeftGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    swipeLeftGestureRecognizer.cancelsTouchesInView = NO;
    swipeLeftGestureRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.tableView addGestureRecognizer:swipeLeftGestureRecognizer];

    UISwipeGestureRecognizer *swipeRightGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    swipeRightGestureRecognizer.cancelsTouchesInView = NO;
    swipeRightGestureRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
    [self.tableView addGestureRecognizer:swipeRightGestureRecognizer];


    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    tapGestureRecognizer.cancelsTouchesInView = NO;
    [self.tableView addGestureRecognizer:tapGestureRecognizer];

}

然后执行dismissKeyboard：

- (void)dismissKeyboard {

    NSLog(@"dismissKeyboard");

    [yourTextFieldPointer resignFirstResponder];

}

并且，如果像我一样，您想要关闭自定义表格单元格内的UITextField的键盘，请执行以下操作：

- (void)dismissKeyboard {

    NSLog(@"dismissKeyboard");

    CustomCellClass *customCell = [tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
    [customCell.textFieldInCell resignFirstResponder]; 

}

希望对任何人有帮助！！

tableView.keyboardDismissMode = .onDrag

这是您的编码乐趣的快速版本：

它添加了轻击手势识别器，然后关闭了键盘。TextField不需要插座！

override func viewDidLoad() {
    super.viewDidLoad()
    view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "handleTap:"))
}

func handleTap(sender: UITapGestureRecognizer) {
    if sender.state == .Ended {
        view.endEditing(true)
    }
    sender.cancelsTouchesInView = false
}

有Swift 3版本，没有阻止单元格上的点击。

在viewDidLoad()方法中：

let dismissKeyboardGesture = UITapGestureRecognizer(target: self, action: #selector(hideKeyboard))
dismissKeyboardGesture.cancelsTouchesInView = false
tableView.addGestureRecognizer(dismissKeyboardGesture)

而且hideKeyboard是这样的：

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

我这样做是这样的：

在TableViewController中创建一个方法以停用第一个响应者（此时将是您的TextBox）

- (BOOL)findAndResignFirstResonder:(UIView *)stView {
    if (stView.isFirstResponder) {
        [stView resignFirstResponder];
        return YES;     
    }

    for (UIView *subView in stView.subviews) {
        if ([self findAndResignFirstResonder:subView]) {
            return YES;
        }
    }
    return NO;
}

在tableView:didSelectRowAtIndexPath:调用上一个方法时：

- (void)tableView:(UITableView *)tableView
                             didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    ...
    [self findAndResignFirstResonder: self.view];
    ...
}

我有一个UITableViewController，实施touchesBegan:withEvent:对我没有用。

这是起作用的：

迅速：

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    view.endEditing(true)
}

目标C：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [self.view endEditing:YES];
}

@interface DismissableUITableView : UITableView {
}
@end

@implementation DismissableUITableView

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
 [self.superview endEditing:YES];
 [super touchesBegan:touches withEvent:event];
}

@end

然后确保在您的Nib文件中将UITableView的类型设置为DismissableUITableView .....也许我可以想到此类的更好名称，但是您明白了。

如果您的目标是iOS7，则可以使用以下之一：

tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;

tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

滚动表视图时，前者将在屏幕外为键盘动画，而后者将像股票Messages应用一样隐藏键盘。

请注意，这些都是UIScrollView，这UITableView从继承。

试试这个：

viewDidLoad(){

    let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboard))

    tableView.addGestureRecognizer(tap)

}

//Calls this function when the tap is recognized.
@objc func dismissKeyboard() {

    //Causes the view (or one of its embedded text fields) to resign the first responder status.
    view.endEditing(true)

}

UITableView是UIScrollView的子类。

我这样做的方法是侦听用户的滚动事件，然后重新签名resignFirstResponder。这是在代码中实现的UIScrollViewDelegate方法；

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

解决这类问题时，我发现最好的方法是研究每个对象和父类的委托协议（在这种情况下，UITableViewDelegate，UIScrollViewDelegate。NS对象触发的事件数量非常大而且很全面。还可以轻松实现协议，然后再将其子类化。

我遇到了同样的问题，这是我的解决方案，它对我来说非常有效：

在您实现的视图或视图控制器中 <UITextFieldDelegate>

（以我为例， UITableViewCell名为TextFieldCell），

声明UITapGestureRecognizer为属性：

@interface TextFieldCell : UITableViewCell <UITextFieldDelegate>
{
    UITextField *theTextField;
    UITapGestureRecognizer *gestureRecognizer;
}
@property (nonatomic,retain) UITextField *theTextField;
@property (nonatomic,retain) UITapGestureRecognizer *gestureRecognizer; 

并在您的视图/控制器中对其进行初始化：

self.gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeKeyboard:)];

在- (void)textFieldDidBeginEditing:(UITextField *)textField方法中，使用superView上移到tableView并调用addGestureRecognizer：

[self.superview.superview addGestureRecognizer:gestureRecognizer];

而在 - (void)textFieldDidEndEditing:(UITextField *)textField，只需删除手势识别器即可：

[self.superview.superview removeGestureRecognizer:gestureRecognizer];

希望能帮助到你。

我希望我的单元格在选择单元格的任何部分时都可以打开键盘，并在单击该单元格的任何位置时将其关闭。要打开键盘：

- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];
    if (selected)
    {
        [self.textField becomeFirstResponder];
    }
}

（注：我子类细胞，但你可以很容易地在实现这一目标tableView:didSelectRowAtIndexPath:的委托方法UITableView）

这样做意味着在最佳解决方案中，如果您两次单击该单元格，键盘都会摇晃，首先是手势识别器尝试关闭键盘，然后重新选择该单元格并尝试打开键盘。

解决方案是检查单击是否发生在当前选定的单元格内：

- (void)viewDidLoad
{
    [super viewDidLoad];
    //gesture recognizer to close the keyboard when user taps away
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                          action:@selector(dismissKeyboard:)];
    tap.cancelsTouchesInView = NO;
    [self.tableView addGestureRecognizer:tap];
}

-(void)dismissKeyboard:(UIGestureRecognizer*)tapGestureRecognizer
{
    if (!CGRectContainsPoint([self.tableView cellForRowAtIndexPath:[self.tableView indexPathForSelectedRow]].frame, [tapGestureRecognizer locationInView:self.tableView]))
    {
        [self.view endEditing:YES];
    }
}

我找到了一个很好的解决方案。

需要使用UIGestureRecognizerDelegate和方法- gestureRecognizer：shouldReceiveTouch： 。

将手势识别器添加到TableView中，如下所示：

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
tapGestureRecognizer.cancelsTouchesInView = NO;
tapGestureRecognizer.delegate = self;
[self.suggestedTableView addGestureRecognizer:tapGestureRecognizer];
[tapGestureRecognizer release];

然后，实现shouldReceiveTouch委托方法以拒绝在UITableViewCell类中执行的触摸。该hideKeyboard方法只有当触摸已经UITableViewCell类，外执行将被调用。

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    if([touch.view isKindOfClass:[UITableViewCell class]]) {
        return NO;
    }
    // UITableViewCellContentView => UITableViewCell
    if([touch.view.superview isKindOfClass:[UITableViewCell class]]) {
        return NO;
    }
    // UITableViewCellContentView => UITableViewCellScrollView => UITableViewCell
    if([touch.view.superview.superview isKindOfClass:[UITableViewCell class]]) {
        return NO;
    }
    return YES; // handle the touch
}

- (void) hideKeyboard{
    [textField resignFirstResponder];
}

UITableView具有一个方便的backgroundView属性，通过它我可以实现此行为而不会影响单元格选择，如以下Swift中所示：

let tableBackTapRecognizer = UITapGestureRecognizer(target: self, action: #selector(hideKeyboard))
tableView.backgroundView = UIView()
tableView.backgroundView?.addGestureRecognizer(tableBackTapRecognizer)

我正在寻找解决方案，但找不到适合我的代码的任何东西，所以我这样做是这样的：

http://82517.tumblr.com/post/13189719252/dismiss-keyboard-on-uitableview-non-cell-tap

它基本上是前面提到的方法的组合，但是不需要子类化或创建背景按钮。

只需使用UITapGestureRecognizer并cancelsTouchesInView = NO意味着点击单元格和UITextViews也会触发隐藏。如果您有多个UITextView，然后单击下一个，则这很不好。键盘将开始隐藏，然后下一个textView成为firstResponder，并且键盘将再次变为可见。为避免这种情况，请检查轻敲位置，仅在轻敲不在单元格上时才隐藏键盘：

// init
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didTapTableView:)];
tapRecognizer.cancelsTouchesInView = NO;
[self.tableView addGestureRecognizer:tapRecognizer];


// Hide on tap
- (void)didTapTableView:(UITapGestureRecognizer *)tap
{
    CGPoint point = [tap locationInView:tap.view];
    [self.view endEditing:!CGRectContainsPoint([self.tableView rectForRowAtIndexPath:[self.tableView indexPathForRowAtPoint:point]], point)];
}

为了scrollViewWillBeginDragging:被触发，tableView的scrollEnabled属性必须是YES

// Hide on scroll
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    [self.view endEditing:YES];
}

为什么要创建一个充满文本字段的表？您应该为包含文本字段的每一行使用详细视图。按下详细视图时，请确保调用“ [myTextField成为FirstResponder]”，以便用户只需单击表列表即可一开始进行编辑。

如果你愿意的子类（啊！）你的表视图，这样的事情可能工作：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

   BOOL backgroundTouched = YES;

   for (UITouch *touch in touches) {
      CGPoint location = [touch locationInView:self];
      for (UITableViewCell *cell in self.visibleCells) {
         if (CGRectContainsPoint(cell.frame, location)) {
            backgroundTouched = NO;
            break;
         }
      }
   }

   if (backgroundTouched) {
      for (UITableViewCell *cell in self.visibleCells) {
         // This presumes the first subview is the text field you want to resign.
         [[cell.contentView.subviews objectAtIndex:0] resignFirstResponder];
      }
   }

   [super touchesBegan:touches withEvent:event];
}

如果要在按下返回键的同时关闭键盘，则只需在textField应该返回方法中添加以下代码即可：

- (BOOL)textFieldShouldReturn:(UITextField *)atextField
{
   [textField resignFirstresponder];
}

某些文本字段可能具有选择器视图，而某些其他视图可能具有子视图，因此在这种情况下，上述方法不起作用，因此在这种情况下，我们需要使用UITapGestureRecognizer类，即在viewDidLoad方法中添加以下代码段，即：

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                          action:@selector(dismissKeyboard)];

    [self.view addGestureRecognizer:tap];

现在，只需将辞职响应者添加到选择器方法中，即：

-(void)dismissKeyboard 
{
    [textField resignFirstResponder];
}

希望能有所帮助，谢谢:)

许多有趣的答案。我想在我认为最适合UITableView方案的解决方案中使用不同的方法（这是我通常使用的方案）：通常，我们通常希望在两种情况下隐藏键盘：在Text UI元素外部点击，或向下/向上滚动UITableView。我们可以通过TapGestureRecognizer轻松添加第一个场景，第二个场景可以通过UIScrollViewDelegate scrollViewWillBeginDragging：方法轻松添加。首先进行业务，隐藏键盘的方法：

   /**
     *  Shortcut for resigning all responders and pull-back the keyboard
     */
    -(void)hideKeyboard
    {
        //this convenience method on UITableView sends a nested message to all subviews, and they resign responders if they have hold of the keyboard
        [self.tableView endEditing:YES];

    }

此方法可对UITableView视图层次结构内的子视图的任何textField UI进行辞职，因此比独立地对每个元素进行辞职更实用。

接下来，我们将通过外部的Tap手势来消除，具体如下：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self setupKeyboardDismissGestures];

}

- (void)setupKeyboardDismissGestures
{

//    Example for a swipe gesture recognizer. it was not set-up since we use scrollViewDelegate for dissmin-on-swiping, but it could be useful to keep in mind for views that do not inherit from UIScrollView
//    UISwipeGestureRecognizer *swipeUpGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
//    swipeUpGestureRecognizer.cancelsTouchesInView = NO;
//    swipeUpGestureRecognizer.direction = UISwipeGestureRecognizerDirectionUp;
//    [self.tableView addGestureRecognizer:swipeUpGestureRecognizer];

    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
    //this prevents the gestureRecognizer to override other Taps, such as Cell Selection
    tapGestureRecognizer.cancelsTouchesInView = NO;
    [self.tableView addGestureRecognizer:tapGestureRecognizer];

}

将tapGestureRecognizer.cancelsTouchesInView设置为NO是为了避免gestureRecognizer覆盖UITableView的正常内部工作（例如，不干扰单元格选择）。

最后，要在向上/向下滚动UITableView时隐藏键盘，我们必须实现UIScrollViewDelegate协议scrollViewWillBeginDragging：方法，如下所示：

.h文件

@interface MyViewController : UIViewController <UIScrollViewDelegate>

.m文件

#pragma mark - UIScrollViewDelegate

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    [self hideKeyboard];
}

希望对您有所帮助！=）

这就是我最终制作作品的方式。我结合了来自不同答案的建议和代码。功能：消除键盘，在编辑和设置“下一步”和“完成”键盘返回类型时移动键盘上方的文本字段。替换带有更多字段的“ ...”

static const CGFloat ANIMATION_DURATION = 0.4;
static const CGFloat LITTLE_SPACE = 5;
CGFloat animatedDistance;
CGSize keyboardSize;

@interface ViewController () <UITextFieldDelegate>
 @property (weak, nonatomic) IBOutlet UITextField *firstNameTXT;
  .....// some other text fields
 @property (weak, nonatomic) IBOutlet UITextField *emailTXT;
@end

@implementation ViewController
- (void)viewDidLoad{
.....
// add tap gesture to help in dismissing keyboard
UITapGestureRecognizer * tapGesture = [[UITapGestureRecognizer alloc]
                                       initWithTarget:self
                                       action:@selector(tapScreen:)];// outside textfields

[self.view addGestureRecognizer:tapGesture];

// set text fields return key type to Next, last text field to Done
[self.firstNameTXT setReturnKeyType:UIReturnKeyNext];
.....
[self.emailTXT setReturnKeyType:UIReturnKeyDone];

// set text fields tags
[self.firstNameTXT setTag:0];
....// more text fields
[self.emailTXT setTag:5];

// add keyboard notification
[[NSNotificationCenter defaultCenter] addObserver:self     selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
}
[[NSNotificationCenter defaultCenter] addObserver:self      selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
}

// dismiss keyboard when tap outside text fields
- (IBAction)tapScreen:(UITapGestureRecognizer *)sender {
  if([self.firstNameTXT isFirstResponder])[self.firstNameTXT resignFirstResponder];
  ...
  if([self.emailTXT isFirstResponder])[self.emailTXT  resignFirstResponder];

  }
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
   if(textField.returnKeyType==UIReturnKeyNext) {
     // find the text field with next tag
     UIView *next = [[textField superview] viewWithTag:textField.tag+1];
     [next becomeFirstResponder];
   } else if (textField.returnKeyType==UIReturnKeyDone || textField.returnKeyType==UIReturnKeyDefault) {
    [textField resignFirstResponder];
 }
return YES;
}

// Moving current text field above keyboard
-(BOOL) textFieldShouldBeginEditing:(UITextField*)textField{
   CGRect viewFrame = self.view.frame;
   CGRect textFieldRect = [self.view.window convertRect:textField.bounds fromView:textField];
   CGRect viewRect = [self.view.window convertRect:self.view.bounds fromView:self.view];
   CGFloat textFieldBottomLine = textFieldRect.origin.y + textFieldRect.size.height + LITTLE_SPACE;//

   CGFloat keyboardHeight = keyboardSize.height;

   BOOL isTextFieldHidden = textFieldBottomLine > (viewRect.size.height - keyboardHeight)? TRUE :FALSE;
  if (isTextFieldHidden) {
    animatedDistance = textFieldBottomLine - (viewRect.size.height - keyboardHeight) ;
    viewFrame.origin.y -= animatedDistance;
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:ANIMATION_DURATION];
    [self.view setFrame:viewFrame];
    [UIView commitAnimations];
  }
  return YES;
}

-(void) restoreViewFrameOrigionYToZero{
  CGRect viewFrame = self.view.frame;
  if (viewFrame.origin.y != 0) {
    viewFrame.origin.y = 0;
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:ANIMATION_DURATION];
    [self.view setFrame:viewFrame];
    [UIView commitAnimations];
  }
}

-(void)keyboardDidShow:(NSNotification*)aNotification{
   NSDictionary* info = [aNotification userInfo];
   keyboardSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
 }

-(void)keyboardDidHide:(NSNotification*)aNotification{
   [self restoreViewFrameOrigionYToZero];// keyboard is dismissed, restore frame view to its  zero origin
}
@end

@mixca的答案非常有用，但是如果我与UITextField不同，该怎么办。我认为最好的方法是通过使用递归函数搜索主视图的所有子视图，请检查以下示例

- (BOOL)findAndResignFirstResponder {
if (self.isFirstResponder) {
    [self resignFirstResponder];
    return YES;
}

    for (UIView *subView in self.subviews) {
        if ([subView findAndResignFirstResponder]) {
            return YES;
        }
    }
    return NO;
}

并且您也可以将此方法放入实用程序类，并可以使用@mixca的答案之类的点击手势。

斯威夫特4 / 4.2 / 5

您也可以在轻按单元格时关闭键盘-在执行其他操作之前。

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    view.endEditing(true)
    // Do something here
    }

tableView.keyboardDismissMode = .onDrag // .interactive