如果用户点击屏幕键盘,我该如何关闭键盘？

Question

我希望能够在用户点击键盘外的任何位置时关闭iPhone键盘.我该怎么做呢？我知道我需要解雇响应者,但需要知道当用户从键盘空间中弹出时如何实现它.

Answer 1

您需要添加一个UITapGestureRecogniser并将其分配给视图,然后在其选择器的文本字段上调用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)

方案2

如果您无法承担添加gestureRecognizer的费用,那么您可以试试这个

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch * touch = [touches anyObject];
    if(touch.phase == UITouchPhaseBegan) {
        [aTextField resignFirstResponder];
    }
}

Answer 2

我用过的最简单的解决方案是:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

      [self.view endEditing:YES];

}

endEditing命令可用于包含文本字段作为子视图的任何视图.此方法的另一个优点是您不需要知道哪个文本字段触发了键盘.因此,即使您有多个文本字段,只需将此行添加到superview即可.

基于Apple文档,我认为这种方法专门用于解决这个问题.

Answer 3

添加tapGesture识别器但请确保cancelsTouchesInView = NO

UITapGestureRecognizer* tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(closeTextInput)];
tapGesture.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];