在viewDidLoad 斯威夫特4.2 代码是这样的

let viewTap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action:#selector(dismissKeyboard))
        view.addGestureRecognizer(viewTap)
@objc func dismissKeyboard() {
        view.endEditing(true)
    }

看看这个，这是最简单的方法，

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
      [self.view endEditing:YES];// this will do the trick
}

Or

这个库将处理包括滚动条自动滚动，点击空间隐藏键盘等…

https://github.com/michaeltyson/TPKeyboardAvoiding

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。

在这种情况下，可以使用ScrollView，并添加到文本字段在ScrollView和我想点击ScrollView和视图，然后解散键盘。为了以防万一，我尝试创建了示例代码。像这样,

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var scrollView: UIScrollView!
    @IBOutlet weak var textField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.tap(_:)))
        view.addGestureRecognizer(tapGesture)
        // Do any additional setup after loading the view, typically from a nib.
    }
    func tap(gesture: UITapGestureRecognizer) {
        textField.resignFirstResponder()
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

你的故事板看，就像。

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()
}

Swift版本，这与其他元素(如UIButton或另一个UITextField)结合使用:

override func viewDidLoad() {
    super.viewDidLoad()

    let tapper = UITapGestureRecognizer(target: self, action:#selector(endEditing))
    tapper.cancelsTouchesInView = false
    view.addGestureRecognizer(tapper)
}