//收回键盘1

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

{

    [self.view.subviews enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {

        [((UIView*)obj) resignFirstResponder];

    }];

} 

//收回键盘2

- (void)resignKeyBoardInView:(UIView *)view

{

    for (UIView *v in view.subviews)

    {

        if ([v.subviews count] > 0)

        {

            [self resignKeyBoardInView:v];

        }

        if ([v isKindOfClass:[UITextView class]] || [v isKindOfClass:[UITextField class]]) {

            [v resignFirstResponder];

        }

    }

}

//收回键盘3--

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

    for (UIView* view in self.view.subviews) {

        if ([view isKindOfClass:[UITextField class]])

　　　　[view resignFirstResponder];

    }

}

//收回键盘4---适用scrollview

//前提：view继承UIContorl,连线Touch Down

//Touch Down--Action

- (IBAction)backgroundTap:(id)sender

{

    [phoneNumberTextFiled resignFirstResponder];//通知文本失去第一响应者状态 键盘收回

}