发送消息resignFirstResponder的文本文件，把它放在那里。请参阅这篇文章了解更多信息。

我发现有些人在使用UITapGestureRecognizer方法时遇到了问题。我在保持现有按钮点击行为不变的情况下完成这一功能的最简单方法是只添加一行到@Jensen2k的答案:

[tap setCancelsTouchesInView:NO];

这使得我现有的按钮仍然可以工作，而不需要使用@Dmitry Sitnikov的方法。

在这里阅读有关属性(搜索CancelsTouchesInView): UIGestureRecognizer类引用

我不确定它将如何与滚动条一起工作，因为我看到有些人有问题，但希望其他人可能会遇到与我相同的情况。

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; ｝

- (void)viewDidLoad
{
    [super viewDidLoad]; 

UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc]
                                                          initWithTarget:self
                                                          action:@selector(handleSingleTap:)];
    [singleTapGestureRecognizer setNumberOfTapsRequired:1];
    [singleTapGestureRecognizer requireGestureRecognizerToFail:singleTapGestureRecognizer];

    [self.view addGestureRecognizer:singleTapGestureRecognizer];
}

- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer
{
    [self.view endEditing:YES];
    [textField resignFirstResponder];
    [scrollView setContentOffset:CGPointMake(0, -40) animated:YES];

}

我认为最简单(最好)的方法是子类化全局视图，并使用hitTest:withEvent方法来监听任何触摸。键盘上的触摸没有注册，所以hitTest:withEvent只在你触摸/滚动/滑动/捏…然后调用[self - ending:YES]。

这比使用touchesBegan要好，因为如果你点击视图顶部的按钮，touchesBegan不会被调用。它比无法识别滚动手势的UITapGestureRecognizer更好。它也比使用暗屏更好，因为在复杂和动态的用户界面中，你不能到处都放暗屏。此外，它不会阻止其他动作，你不需要点击两次来选择外面的按钮(就像在UIPopover的情况下)。

此外，这比调用[textField resignFirstResponder]更好，因为你可能在屏幕上有许多文本字段，所以这适用于所有的文本字段。

这是

在本例中，aTextField是唯一的UITextField....如果有其他的uitextview，还有一点点事情要做。

// YourViewController.h
// ...
@interface YourViewController : UIViewController /* some subclass of UIViewController */ <UITextFieldDelegate> // <-- add this protocol
// ...
@end

// YourViewController.m

@interface YourViewController ()
@property (nonatomic, strong, readonly) UITapGestureRecognizer *singleTapRecognizer;
@end
// ...

@implementation
@synthesize singleTapRecognizer = _singleTapRecognizer;
// ...

- (void)viewDidLoad
{
    [super viewDidLoad];
    // your other init code here
    [self.view addGestureRecognizer:self.singleTapRecognizer];

{

- (UITapGestureRecognizer *)singleTapRecognizer
{
    if (nil == _singleTapRecognizer) {
        _singleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapToDismissKeyboard:)];
        _singleTapRecognizer.cancelsTouchesInView = NO; // absolutely required, otherwise "tap" eats events.
    }
    return _singleTapRecognizer;
}

// Something inside this VC's view was tapped (except the navbar/toolbar)
- (void)singleTapToDismissKeyboard:(UITapGestureRecognizer *)sender
{
    NSLog(@"singleTap");
    [self hideKeyboard:sender];
}

// When the "Return" key is pressed on the on-screen keyboard, hide the keyboard.
// for protocol UITextFieldDelegate
- (BOOL)textFieldShouldReturn:(UITextField*)textField
{
    NSLog(@"Return pressed");
    [self hideKeyboard:textField];
    return YES;
}

- (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.
    [aTextField resignFirstResponder];
    NSLog(@"keyboard hidden");
}