我真的被这个案子困了一周。我在 UINavigationItem 中有一个 UIBarButtonItem，层次结构是这样的
BarButtonItem 是segmentedControl 的包装。UIBarbuttonitem 和 UIsegmentedControl 是通过编程方式制作的，但其他的是在 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。在我在这个论坛上阅读的几个线程中，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导航栏中时检测到 touchesBegan 和 touchesEnded。
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;
}
但它仍然没有好转。
有人可以描述为什么会这样？问候
-Risma-