您需要添加一个UITapGestureRecogniser并将其分配给视图，然后在其 Select 器的UITextField上调用Resign First Responder.
代码:
In viewDidLoad个
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
[self.view addGestureRecognizer:tap];
In dismissKeyboard:
-(void)dismissKeyboard
{
[aTextField resignFirstResponder];
}
(其中aTextField是负责键盘的文本字段)
Swift 3版看起来是这样的
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard (_:)))
self.view.addGestureRecognizer(tapGesture)
For dismissKeyboard个
@objc func dismissKeyboard (_ sender: UITapGestureRecognizer) {
aTextField.resignFirstResponder()
}