iOS - 触摸 UITextField 外部时关闭键盘

Question

我想知道如何在用户触摸 UITextField 之外时让键盘消失。

Answer 1

您需要添加一个 UITapGestureRecogniser 并将其分配给 View ，然后在其选择器上的 UITextField 上调用 resign first responder。

代码:

在viewDidLoad中

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

[self.view addGestureRecognizer:tap];

在 dismissKeyboard 中:

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

(其中 aTextField 是负责键盘的文本字段)

Swift 3 版本看起来像那样

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

对于 dismissKeyboard

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