touchesBegan和touchesEnded在另一个子视图上检测到

Question

我真的被困在一个星期左右这种情况。 我里面有一个UINavigationItem的UIBarButtonItem，层次结构是这样的

的BarButtonItem是segmentedControl的包装。 UIBarbutitem和UIsegmentedControl是以编程方式编写的，但其他编程则是在IB中编写的。

在这种情况下，我想在按下或触摸barbuttonitem后显示一个视图。在这个论坛中读到的几个线程中，我知道UIBarbuttonItem没有继承UIResponder，所以我选择NavigationBar来获得触摸，并且为它定义一个框架。

这是我提出的代码：

-(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"); 
} 
} 

导航栏是myViewController.h声明，我将其设置为一个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]; 
    } 
} 
} 

touchesBegan和touchesEnded在我点击工具栏时检测到，而不在导航栏中。

我没有实现的则hitTest方法是这样的：

- (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; 
} 

，但它仍然没有得到更好的。

有人可以解释为什么会发生这种情况？ 问候
-Risma-

Answer 1

你可以一个动作简单地添加到barbutton项目像

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

[self.mybarbutton setTarget:self];