touchesBegan和touchesEnded在另一个子视图中检测到

Question

关于这个案子，我真的陷入了一周的困境。 我在UINavigationItem中有一个UIBarButtonItem，层次结构就像这样

BarButtonItem是segmentedControl的包装器。 UIBarbuttonitem和UIsegmentedControl是以编程方式制作的，但其他的则是在IB中制作的。

在这种情况下，我想在按下或触摸barbuttonitem后显示一个视图。在我在这个论坛中阅读的几个帖子中，我知道UIBarbuttonItem没有继承UIResponder，所以我选择了NavigationBar来获取触摸，我为它定义了一个框架。

这是我制作的代码：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
 navBar = self.navigationController.navigationBar;
 int index = _docSegmentedControl.selectedSegmentIndex;
NSLog(@"index di touches began : %d", index);
CGFloat x;

if (index == 0) {
    x = 0.0;
 }else if (index == 1) {
      x = widthSegment + 1;
 }else if (index == 2) {
      x = 2*widthSegment + 1;
 }else if (index == 3) {
      x =   3*widthSegment+ 1;
 }else if (in   dex == 4) {
      x = 4*widthSegment + 1;
}

CGRect frame = CGRectMake(x, 0.00, widthSegment, 46.00);

 UITouch *touch = [touches anyObject];
 CGPoint gestureStartPoint = [touch locationInView:navBar];

NSLog(@"gesturestart : %f, %f", gestureStartPoint.x, gestureStartPoint.y);

 if (CGRectContainsPoint(frame, gestureStartPoint)) {
    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(segmentItemTapped:) object:[self navBar]];
    NSLog(@"cancel popover");
}
}

navBar在myViewController.h中声明，我将其设置为IBOutlet。

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
 int index = _docSegmentedControl.selectedSegmentIndex;
 NSLog(@"index di touches ended : %d", index);
 navBar = self.navigationController.navigationBar;
 CGFloat x;

 if (index == 0) {
      x = 0.0;
 }else if (index == 1) {
      x = widthSegment + 1;
 }else if (in   dex == 2) {
      x = 2*widthSegment + 1;
 }else if (index == 3) {
      x = 3*widthSegment+ 1;
 }else if (index == 4) {
      x = 4*widthSegment + 1;
}

 CGRect frame = CGRectMake(x, 0.00, widthSegment, 46.00);

 UITouch *touch = [touches anyObject];
 CGPoint gestureLastPoint = [touch locationInView:navBar];

 NSLog(@"lastPOint : %d", gestureLastPoint);

if (CGRectContainsPoint(frame, gestureLastPoint)) {
    if (touch.tapCount <= 2) {
           [self performSelector:@selector(segmentItemTapped:) withObject:nil afterDelay:0.0];
    }
}
}

当我点击工具栏，而不是在导航栏中时，检测到了触摸开始和触摸自动。

我确实实现了这样的hitTest方法：

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView *touchedView = [super hitTest:point withEvent:event];
    NSSet* touches = [event allTouches];
    // handle touches if you need
    return touchedView;
}

但它仍然没有变得更好。

有人可以说明为什么会这样吗？ 问候
-Risma -

Answer 1

你可以简单地向barbutton项添加一个动作，如

[self.mybarbutton setAction:@selector(barButtonTapped:)];  

[self.mybarbutton setTarget:self];