Objective c 是否将键盘从UITextField中移除，将UITextView作为UIScrollView的子视图？

我有一个带有

uicrollview

的应用程序，作为

UIView

的子视图添加。我已经添加了

UITextField

，

UITextview

作为

UIScrollView

的子视图。我想在滚动视图中点击时关闭键盘。我该怎么做？

试试这个

- (void)viewDidLoad
{
   [super viewDidLoad];

      UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
      tapGesture.cancelsTouchesInView = NO;
      [scrollView addGestureRecognizer:tapGesture];
      [tapGesture release];
}
-(void)dismissKeyboard
{
    [txtNotes resignFirstResponder];
    [textView resignFirstResponder];
}

---

只需添加

uitappesturerecognizer

- (void)viewDidLoad
{
    [super viewDidLoad];
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapGestureCaptured:)];
    [scr addGestureRecognizer:singleTap];
}


- (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture
{
    //Get touch point
    CGPoint touchPoint=[gesture locationInView:scr];

    //Hide keyBoard
    [self.view endEditing:YES];
}

---

当我将手势添加到

UIScrollView

的子类中时，我的视图树中的各种手势相互干扰，例如能够单击子视图、滚动视图以及在所有情况下关闭键盘。我提出了这个解决方案，它可以从

uicrollview

的超类或从

UIViewController

设置

DismissKeyboardTapSirture

类使用ARC，处理视图下的任何文本字段，并且不会从子视图（如按钮）接收任何单击。还利用iOS7的滚动效果关闭键盘

从UIScrollView超类设置：

    _dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self];

或从UIViewController：

    _dismissKeyboard = [[DismissKeyboardTapGesture alloc] initWithView:self.view];

下面是课堂：

@interface DismissKeyboardTapGesture : NSObject <UIGestureRecognizerDelegate>

@end

@implementation DismissKeyboardTapGesture

- (id)initWithView:(UIView *)view
{
    self = [super init];
    if (self) {
        UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTap:)];
        singleTap.cancelsTouchesInView = NO;
        singleTap.delegate = self;
        [view addGestureRecognizer:singleTap];

        if ([view respondsToSelector:@selector(setKeyboardDismissMode:)]) {
            // Bonus effect to dismiss keyboard by scrolling
            ((UIScrollView *)view).keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;
        }
    }
    return self;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    // Don't stop any existing gestures in our view from working
    if (otherGestureRecognizer.view == gestureRecognizer.view) {
        return YES;
    }
    return NO;
}

- (void)singleTap:(UIGestureRecognizer*)gestureRecognizer
{
    // Close keyboard for any text edit views that are children of the main view
    [gestureRecognizer.view endEditing:YES];
}

@end

@interface dismisskeyboardtappostate:NSObject
@结束
@键盘手势的实现
-（id）initWithView:（UIView*）视图
{
self=[super init]；
如果（自我）{
UITapGestureRecognizer*singleTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector（singleTap:）]；
singleTap.cancelsTouchesInView=否；
singleTap.delegate=self；
[查看AddGestureRecognitor:singleTap]；
如果（[view respondsToSelector:@selector（setKeyboardDismissMode:）]））{
//通过滚动消除键盘的额外效果
（（UIScrollView*）视图）。keyboardDismissMode=UIScrollViewKeyboardDismissModeInteractive；
}
}
回归自我；
}
-（BOOL）手势识别器：（UIGestureRecognizer*）手势识别器应与gestureRecognizer：（UIGestureRecognizer*）其他手势识别器同时识别
{
//在我们看来，不要阻止任何现有的姿态发挥作用
if（othergesturecognizer.view==gesturecognizer.view）{
返回YES；
}
返回否；
}
-（无效）单键点击：（UIGestureRecognitor*）GestureRecognitor
{
//关闭作为主视图子视图的任何文本编辑视图的键盘
[手势识别器.视图编辑：是]；
}
@结束

在iOS 7中，您可以轻松实现这一点

scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

---

只需在UIView上添加UIAPTgestureRecognitor而不是UIScrollView