UITapGestureRecognizer在子视图中阻止UIButton的触摸事件
我相信我在UITapGestureRecognizer中关于在聊天室区域阻止或阻止触摸到previewCancelButton时关闭键盘的问题。这里下面是我的相关代码:UITapGestureRecognizer在子视图中阻止UIButton的触摸事件
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];
}
ChatroomVC.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正确显示在stickerPreviewView的右上角,但无法接收触摸事件。当我触摸按钮时,它在控制台中显示“111”,当我追溯到时发现包含addDismissKeyboardGesture方法的BaseTemplateVC.m,所以我认为这可能会导致问题。
进展:我在ChatroomVC.m所以现在可以忽略轻敲姿势上的按钮,但问题仍然是按钮动作不被解雇修改gestureRecognizer方法。
我找到了解决这个在GestureRecogniser委托方法使用下面的代码:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if ([touch.view isDescendantOfView:IFView.stickerPreviewView]) {
return NO;
}
return YES;
}
它指定在这种情况下IFView.stickerPreviewView是返回NO正是子视图。此外,在InputFunctionView,用这个来代替添加子视图:
[self.superview addSubview:_stickerPreviewView];
只要试试这个,我想它会奏效。 使用shouldReceiveTouch
手势代表方法,返回NO当touch.view是按钮类。 所以当它找到按钮它会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: 我已在故事板视图控制器的主视图按钮。
- (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");
}
希望它有帮助。 快乐编码...
我实际上不想放弃原始手势,而只是在stickerPreviewView子视图中为previewCancelButton添加触摸识别。 – SanitLee
它会像你想要的那样。当你点击按钮时,它将不返回手势,这将导致手势动作不会被触发,因此按钮动作会被触发。当你在手势区域内按钮以外时,它会调用手势方法。 – Janmenjaya
那么我应该把你的代码放到我现有的代码中?请多多包涵;我很初学。谢谢。 – SanitLee
可以在手势操作功能检查按区域和编程按与'.sendAction'按钮和rightaway返回,如果它在按钮区域 – Tj3n
@ Tj3n我不确定如何检查按钮的点按区域。你能用代码告诉我,所以我能明白你的意思吗?谢谢。 – SanitLee
你可以请检查剪辑绑定到是,看看你的按钮仍然可见 –