这个怎么样:我知道这是一个老帖子。它可能会帮助某些人:)

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {  
    NSArray *subviews = [self.view subviews];
    for (id objects in subviews) {
        if ([objects isKindOfClass:[UITextField class]]) {
            UITextField *theTextField = objects;
            if ([objects isFirstResponder]) {
                [theTextField resignFirstResponder];
            }
        } 
    }
}

在swift 5中，你可以使用以下代码来解除文本域外的键盘

override func viewDidLoad() {
    // ... code

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

@objc func dismissKeyboard(_ sender: UITapGestureRecognizer) {
    self.view.endEditing(true)
}

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。

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

你可以使用UITapGestureRecongnizer方法通过点击UITextField之外的按钮来取消键盘。通过使用这个方法，每当用户在UITextField之外点击时，键盘就会被驳回。下面是使用它的代码片段。

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

    [self.view addGestureRecognizer:tap];


//Method
- (void) dismissk
{
    [abctextfield resignFirstResponder];
    [deftextfield resignFirstResponder];

}

对于那些在Swift中挣扎的人。这是Jensen2k在Swift中接受的答案。

斯威夫特2.3

    override func viewDidLoad() {
        //.....

        let viewTapGestureRec = UITapGestureRecognizer(target: self, action: #selector(handleViewTap(_:)))
        //this line is important
        viewTapGestureRec.cancelsTouchesInView = false
        self.view.addGestureRecognizer(viewTapGestureRec)

         //.....
    }

    func handleViewTap(recognizer: UIGestureRecognizer) {
        myTextField.resignFirstResponder()
    }