objective-c - 将 UITextField、UITextView 中的键盘作为 UIScrollView 的子视图解散？

Question

我有一个UIScrollView添加为子视图的应用程序UIView。我已经添加了UITextField，UITextview作为UIScrollView.I 的子视图。当我在滚动视图中点击时，我想关闭键盘。我怎样才能做到这一点？

Answer 1

只需添加UITapGestureRecognizer

- (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];
}

Answer 2

在 iOS 7 中，您可以轻松实现这一点。

scrollView.keyboardDismissMode = UIScrollViewKeyboardDismissModeInteractive;

Answer 3

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];
}

Answer 4

当我将手势添加到 的子类时UIScrollView，我遇到了视图树中的各种手势相互干扰的问题，例如能够单击子视图、滚动视图以及在所有情况下都关闭键盘。我想出了这个解决方案，它可以从超类UIScrollView或UIViewController.

该类DismissKeyboardTapGesture使用 ARC，适用于视图下的任何文本字段，并且不会接管来自按钮等子视图的任何点击。还利用 iOS7 滚动效果来关闭键盘。

从 UISScrollView 超类设置：

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

或来自 UIViewController：

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

这是课程：

@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