你需要添加一个UITapGestureRecogniser并将其分配给视图，然后在它的选择器上的UITextField上调用resign first responder。

代码:

在viewDidLoad

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

[self.view addGestureRecognizer:tap];

在dismissKeyboard:

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

(其中，aTextField是负责键盘的文本字段)

Swift 3版本是这样的

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard (_:)))
self.view.addGestureRecognizer(tapGesture)

对于dismissKeyboard

@objc func dismissKeyboard (_ sender: UITapGestureRecognizer) {
    aTextField.resignFirstResponder()
}

设置文本字段委托视图didload: 重载函数viewDidLoad() ｛ super.viewDidLoad () self. usertext .delegate = self ｝ 添加此函数: func textFieldShouldReturn(userText: UITextField! ｛ userText.resignFirstResponder () 返回true; ｝

所以我只需要解决这个问题，之前的答案都不适用。我的情况是:一个UISearchBar，加上屏幕上的一些其他控件。我想在搜索栏之外点击键盘，但不传播到任何其他控件。当键盘被隐藏时，我希望所有的控制都能工作。

我做了什么:

1)在我的视图控制器中实现一个自定义触摸处理程序。

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?)
{
    if searchBar.isFirstResponder()
    {
        // This causes the first responder, whoever it is, to resign first responder, and hide the keyboard.
        // We also "eat" the touch here and not allow it to propagate further.
        view.endEditing(true)
    }
    else
    {
        // OK to propagate the touch
        super.touchesBegan(touches, withEvent: event)
    }
}

2)添加了一对委托方法(我的是UISearchBar，但也有类似的UITextField)。下面代码中的controlContainerView是一个UIView，里面有一堆按钮。记住，在父视图上设置userInteractionEnabled会禁用它的所有子视图。

 func searchBarTextDidBeginEditing(searchBar: UISearchBar)
 {
     controlContainerView.userInteractionEnabled = false
     someButton.userInteractionEnabled = false
 }

 func searchBarTextDidEndEditing(searchBar: UISearchBar)
 {
     searchBar.resignFirstResponder()

    // Done editing: enable the other controls again.

    controlContainerView.userInteractionEnabled = false
    someButton.userInteractionEnabled = false
}

你可以为UiView创建类别并重写touchesBegan方法，如下所示。

这对我来说很好。这是一种集中解决这一问题的方法。

#import "UIView+Keyboard.h"
@implementation UIView(Keyboard)

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.window endEditing:true];
    [super touchesBegan:touches withEvent:event];
}
@end

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.view.endEditing(true)
    super.touchesBegan(touches, withEvent: event)
}

在我的新发展中，我以巴里为例。它工作得很好!但我不得不包括一个轻微的变化，要求解散键盘，只有文本字段被编辑。

所以，我在Barry的例子中加入了以下内容:

- (void) textFieldDidBeginEditing:(UITextField *)textField
{
    _textBeingEdited = textField;
}
-(void) textFieldDidEndEditing:(UITextField *)textField
{
    _textBeingEdited = nil;
}

同时，我修改了hideKeyboard方法如下:

- (IBAction)hideKeyboard:(id)sender
{
    // Just call resignFirstResponder on all UITextFields and UITextViews in this VC
    // Why? Because it works and checking which one was last active gets messy.
    //UITextField * tf = (UITextField *) sender;
    [_textBeingEdited resignFirstResponder];
}