UITapGestureRecognizer阻止子视图中的UIButton触摸事件
UITapGestureRecognizer阻止子视图中的UIButton触摸事件
提问于 2016-09-19 02:35:50
我相信我对UITapGestureRecognizer有一个问题，因为当我在聊天室敲击键盘时，会阻止或阻止对previewCancelButton的触摸。以下是我的相关代码：
BaseTemplateVC.m
- (void)addDismissKeyboardGesture {
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard:)];
tapGesture.cancelsTouchesInView = NO;
tapGesture.delegate = self;
self.view.tag = 111;
[self.view addGestureRecognizer:tapGesture];
}
- (void) dismissKeyboard:(id)sender {
UITapGestureRecognizer *gesture = sender;
UIView *view = gesture.view;
NSLog(@"%ld", (long)view.tag);
[self.view endEditing:YES];
}ChattomVC.m
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
//Disallow recognition of tap gestures in the segmented control.
if (([touch.view isKindOfClass:[UIButton class]])) {
NSLog(@"noooooooo");
return NO;
}
return YES;
NSLog(@"yesssssss");
}InputFunctionView.m
- (void)selectedSticker:(NSString *)stickerURLString {
/* Sticker preview subview */
stickerPreviewView = [[UIImageView alloc] initWithFrame:CGRectMake(0, -120, FrameWidth, 120)];
stickerPreviewView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5f];
stickerPreviewView.userInteractionEnabled = YES;
[self addSubview:stickerPreviewView];
[self bringSubviewToFront:stickerPreviewView];
/* Initialise previewCancelButton */
self.previewCancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.previewCancelButton.frame = CGRectMake(Main_Screen_Width-30, SpaceForItems-120, 20, 20);
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:@"btn_previewcancel.png"] forState:UIControlStateNormal];
[self.previewCancelButton setBackgroundImage:[UIImage imageNamed:@"btn_previewcancel.png"] forState:UIControlStateHighlighted];
[self.previewCancelButton addTarget:self action:@selector(cancelStickerPreviewButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview: self.previewCancelButton];
}
/* Cancel sticker preview subview */
- (void)cancelStickerPreviewButtonPressed:(id)sender {
NSLog(@"cancel sticker preview");
[self.previewCancelButton removeFromSuperview];
[stickerPreviewView removeFromSuperview];
}现在，previewCancelButton正确地位于stickerPreviewView的右上角，但无法接收到触摸事件。当我按下按钮时，它在控制台中显示"111“，当我追溯时，我发现BaseTemplatVC.m包含addDismissKeyboardGesture方法，所以我相信这可能会导致问题。
任何人都可以指导我找到一些解决办法。我会很感激的。提前谢谢。
进步：，我已经在ChattomVC.m中修改了gestureRecognizer方法，所以现在它可以忽略按钮上的点击手势，但是问题仍然存在，因为按钮没有被触发。
回答 2
Stack Overflow用户
回答已采纳
发布于 2016-09-21 13:32:00
通过在GestureRecogniser委托方法中使用下面的代码，我找到了一个解决方案：
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if ([touch.view isDescendantOfView:IFView.stickerPreviewView]) {
return NO;
}
return YES;
}它确切地指定了在本例中IFView.stickerPreviewView将返回NO的子视图。在InputFunctionView中，也可以使用它来添加子视图：
[self.superview addSubview:_stickerPreviewView];Stack Overflow用户
发布于 2016-09-19 03:17:51
试一试，我想它会成功的。使用手势的shouldReceiveTouch委托方法，当touch.view是按钮类时，不返回。因此，当它找到按钮时，它将放弃手势并采取按钮操作。
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// Block the recognition of tap gestures in the button.
if (([touch.view isKindOfClass:[UIButton class]])) {
return NO;
}
return YES;
}这里是演示实现: --我已经在故事板中的视图控制器的主视图上使用了按钮。
- (void)viewDidLoad {
[super viewDidLoad];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureClicked:)];
tapGesture.delegate = self;
[self.view addGestureRecognizer:tapGesture];
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// Disallow recognition of tap gestures in the segmented control.
if (([touch.view isKindOfClass:[UIButton class]])) {
return NO;
}
return YES;
}
- (IBAction)btnTestClicked:(UIButton *)sender {
NSLog(@"test button click");
}
- (void)tapGestureClicked:(UIGestureRecognizer *)recog
{
NSLog(@"tap gesture clicked");
}希望能帮上忙。快乐的编码..。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39564613
复制相关文章
相似问题
腾讯云开发者
