touchesBegan和touchesEnded在另一個子視圖上檢測到

Question

我真的被困在一個星期左右這種情況。 我裏面有一個UINavigationItem的UIBarButtonItem，層次結構是這樣的

的BarButtonItem是segmentedControl的包裝。 UIBarbutitem和UIsegmentedControl是以編程方式編寫的，但其他編程則是在IB中編寫的。

在這種情況下，我想在按下或觸摸barbuttonitem後顯示一個視圖。在這個論壇中讀到的幾個線程中，我知道UIBarbuttonItem沒有繼承UIResponder，所以我選擇NavigationBar來獲得觸摸，並且爲它定義一個框架。

這是我提出的代碼：

-(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"); 
} 
} 

導航欄是myViewController.h聲明，我將其設置爲一個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在我點擊工具欄時檢測到，而不在導航欄中。

我沒有實現的則hitTest方法是這樣的：

- (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; 
} 

，但它仍然沒有得到更好的。

有人可以解釋爲什麼會發生這種情況？ 問候
-Risma-

Answer 1

你可以一個動作簡單地添加到barbutton項目像

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

[self.mybarbutton setTarget:self];