在UIScrollView中关闭键盘

Question

好吧，我在UITextFields内有几个UITextViews和UIScrollView，我想在触摸scrollview时将键盘设置为消失或滚动（当你在文本字段/视图中触摸时，当然除外）。

我目前尝试这样做是将UIScrollView替换为子类，并将其设置为在 touchesBegan 方法内调用removeKeyboard函数（在主视图控制器中定义）。但是，这只会移除键盘以进行正常触摸，而不是仅在滚动视图时。那么，在UIScrollView内删除键盘的最佳方法是什么？

提前感谢您的帮助。

Answer 1

这是在iOS 7.0及更高版本中实现此目的的最简洁方法。

scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;

或者

scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

夫特：

scrollView.keyboardDismissMode = .onDrag

或者

scrollView.keyboardDismissMode = .interactive

Answer 2

有点迟，但如果有人正在寻找这个问题的答案，这就是我解决它的方法：

1）创建一个带有目标回调方法的点击手势识别器，使用所有字段上的resignFirstResponder关闭键盘。

2）将点击手势添加到滚动视图。

以下是一个例子：

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];

// prevents the scroll view from swallowing up the touch event of child buttons
tapGesture.cancelsTouchesInView = NO;    

[pageScrollView addGestureRecognizer:tapGesture];

[tapGesture release];

...

// method to hide keyboard when user taps on a scrollview
-(void)hideKeyboard
{
    [myTextFieldInScrollView resignFirstResponder];
}

Answer 3

虽然本质是相同的，但我更喜欢代码。

在“属性”检查器中滚动scrollView时，将键盘设置为消失：

点击scrollView时，键盘会消失：

1. 将Tap Gesture Recognizer拖到滚动视图
上
2. 
3. 
4. 操作中只有一行 - scrollView.endEditing(true)。如果您使用的是Objective-C，[self.scrollView endEditing: YES];

Answer 4

在 Swift ：

有点迟，但如果有人正在寻找这个问题的答案，这就是我解决它的方法：

1）创建一个带有目标回调方法的点击手势识别器，使用所有字段上的resignFirstResponder关闭键盘。

2）将点击手势添加到滚动视图。

以下是一个例子：

import UIKit

class ViewController: UIViewController {

    @IBOutlet var t1: UITextField!
    @IBOutlet var t2: UITextField!
    @IBOutlet var t3: UITextField!
    @IBOutlet var t4: UITextField!

    @IBOutlet var srcScrollView: UIScrollView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        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)
    }

    func hideKeyboard() {
        t1.resignFirstResponder()
        t2.resignFirstResponder()
        t3.resignFirstResponder()
        t4.resignFirstResponder()
    }
}

Answer 5

查看UIScrollView的 keyboardDismissMode 属性。

// will hide keyboard when your text field is about to go beyond the keyboard.
vwScrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

// will hide keyboard instantly once the scroll view started scrolling by user.
vwScrollView.keyboardDismissMode = UIScrollViewKeyboardDismissOnDrag;

// If you need to hide keyboard on tap of scroll view,consider adding a tap gesture or sub class and override touchesbegan: method.

Swift版本

vwScrollView.keyboardDismissMode = .interactive
vwScrollView.keyboardDismissMode = .onDrag

Answer 6

试试这个

[self.selectedViewController.view endEditing:YES];

Answer 7

当我将手势添加到UIScrollView的子类时，我遇到了视图树中各种手势相互干扰的问题，例如能够点击子视图，滚动视图，以及键盘在所有情况下都会被忽略。我提出了这个解决方案，可以从UIScrollView的超类或UIViewController的超类设置。

DismissKeyboardTapGesture类使用ARC，适用于视图下的任何文本字段，并且不接受来自子视图（如按钮）的任何点击。还利用iOS7滚动效果来消除键盘。

从UISScrollView超类设置：

    _dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self];

或来自UIViewController：

    _dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self.view];

这是班级：

@interface DismissKeyboardTapGesture : NSObject <UIGestureRecognizerDelegate>

@end

@implementation DismissKeyboardTapGesture

- (id)initWithView:(UIView *)view
{
    self = [super init];
    if (self) {
        UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTap:)];
        singleTap.cancelsTouchesInView = NO;
        singleTap.delegate = self;
        [view addGestureRecognizer:singleTap];

        if ([view respondsToSelector:@selector(setKeyboardDismissMode:)]) {
            // Bonus effect to dismiss keyboard by scrolling
            ((UIScrollView *)view).keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;
        }
    }
    return self;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    // Don't stop any existing gestures in our view from working
    if (otherGestureRecognizer.view == gestureRecognizer.view) {
        return YES;
    }
    return NO;
}

- (void)singleTap:(UIGestureRecognizer*)gestureRecognizer
{
    // Close keyboard for any text edit views that are children of the main view
    [gestureRecognizer.view endEditing:YES];
}

@end

Answer 8

有点晚了但是如果有人用 Swift 3 来搜索这个问题的答案：

fileprivate func < <T : Comparable>(lhs: T?, rhs: T?) -> Bool {
  switch (lhs, rhs) {
  case let (l?, r?):
    return l < r
  case (nil, _?):
    return true
  default:
    return false
  }
}

fileprivate func > <T : Comparable>(lhs: T?, rhs: T?) -> Bool {
  switch (lhs, rhs) {
  case let (l?, r?):
    return l > r
  default:
    return rhs < lhs
  }
}

Answer 9

创建一个扩展类，用于在任何地方触摸scrollview / view时隐藏键盘

extension UIViewController {
func hideKeyboardWhenTappedAround() {
    let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
    tap.cancelsTouchesInView = false
    view.addGestureRecognizer(tap)
}

@objc func dismissKeyboard() {
    view.endEditing(true)
}

}

并在viewDidLoad中调用此方法，如

 override func viewDidLoad() {
    super.viewDidLoad()

    self.hideKeyboardWhenTappedAround()

}

Answer 10

试试这个滚动视图委托方法 -

将IB中的委托链接到滚动视图，然后复制此代码（根据需要进行修改）。

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{         
//sample code    
    [challengeABallotComponent.voterNameTextField resignFirstResponder];
    [challengeABallotComponent.ballotNumberTextField resignFirstResponder];
    [locationInformation.pollingLocation resignFirstResponder];
}

这应该有效。您也可以尝试其他委托方法

   -(void)scrollViewDidScroll: (UIScrollView *)scrollView 
{
//do your stuff
}

Answer 11

scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;

Answer 12

    extension UIView{
    //Set tag via storyboard 
    func keyboardDissmissInteractiveMode(_ tag:Int){
        if let scrollView = self.viewWithTag(tag) as? UIScrollView{
            scrollView.keyboardDismissMode = .interactive
        }
        if let tableview = self.viewWithTag(tag) as? UITableView{
            tableview.keyboardDismissMode = .interactive
        }
    }

    func keyboardDissmissOnDragMode(_ tag:Int){
        if let scrollView = self.viewWithTag(tag) as? UIScrollView{
            scrollView.keyboardDismissMode = .onDrag
        }
        if let tableview = self.viewWithTag(tag) as? UITableView{
            tableview.keyboardDismissMode = .onDrag
        }
    }


    func keyboardDissmissInteractiveMode(_ view:UIView){
        if let scrollView = view as? UIScrollView{
            scrollView.keyboardDismissMode = .interactive
        }
        if let tableview = view as? UITableView{
            tableview.keyboardDismissMode = .interactive
        }
    }

    func keyboardDissmissOnDragMode(_ view:UIView){
        if let scrollView = view as? UIScrollView{
            scrollView.keyboardDismissMode = .onDrag
        }
        if let tableview = view as? UITableView{
            tableview.keyboardDismissMode = .onDrag
        }
    }
}