显示来自UIBarButtonItem的不同抽头计数的不同视图（包装UISegmentedControl）

Question

我已经阅读了有关UITouch和UIGestureRecognizer的内容，但我仍然对它们之间的区别感到困惑。 我有一个案子。在我的应用程序中，我有一个barbuttonitem，我想在点击该按钮时显示不同的视图。如果我做一个单击，我想显示一个textview，但当我再次执行单击时，我想显示该按钮的弹出窗口。是否有人可以给我一个示例代码来做这件事并给出一些关于UITouch和UIGestureRecognizer有什么区别的解释???

更新

barbuttonitem是UISegmentedControl的包装器，这是来自desain的图片

我尝试使用touchesBegan：withEvent：和touchesEnded：withEvent：来解决这个问题，但我不知道如何将它连接到那个barbuttonitem。 这是我做的代码：

-(void)addSegment{


NSAutoreleasePool *pool;
int count_doc = [_docsegmentmodels count];
NSLog(@"count doc add segment : %d", count_doc);
pool = [[NSAutoreleasePool alloc] init];
DocSegmentedModel *sl;
NSMutableArray *segmentTextMutable = [NSMutableArray array];

for(int i=0 ;(i<count_doc && i < max_segment);i++){
    sl = [_docsegmentmodels objectAtIndex:i];
    NSString *evalString = [[KoderAppDelegate sharedAppDelegate] setStringWithLength:sl.docSegmentFileName:10];  
    [segmentTextMutable addObject:NSLocalizedString(evalString,@"")];

}



NSArray *segmentText = [segmentTextMutable copy];

_docSegmentedControl = [[UISegmentedControl alloc] initWithItems:segmentText];
_docSegmentedControl.selectedSegmentIndex = 0; 
_docSegmentedControl.autoresizingMask =  UIViewAutoresizingFlexibleHeight;
_docSegmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;//UISegmentedControlStylePlain;// UISegmentedControlStyleBar;//UISegmentedControlStyleBezeled;
//docSegmentedControl.frame = CGRectMake(0, 0, 800, 46.0);
[_docSegmentedControl addTarget:self action:@selector(docSegmentAction:) forControlEvents:UIControlEventValueChanged];

// Add the control to the navigation bar
//UIBarButtonItem *segmentItem = [[UIBarButtonItem alloc] initWithCustomView:_docSegmentedControl];
segmentItem = [[UIBarButtonItem alloc] initWithCustomView:_docSegmentedControl];
self.navItem.leftBarButtonItem = segmentItem;
self.navItem.leftBarButtonItem.title = @"";


[pool release];
[segmentItem release];
[_docSegmentedControl release];

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[NSObject cancelPreviousPerformRequestsWithTarget:self 
                                         selector:@selector(segmentItemTapped:) object:segmentItem];

}

-(void)touchesEnd:(NSSet *)touches withEvent:(UIEvent *)event{
if (touches.count == 1) {
    if (theTouch.tapCount == 2) {
        [self performSelector:@selector(segmentItemTapped:)withObject:segmentItem afterDelay:0.35];
    }else {
        [self performSelector:@selector(docSegmentAction:) withObject:segmentItem afterDelay:0.0];
    }
}   

}

- (IBAction)segmentItemTapped:(id)sender{  

if (self.fileProperties == nil) {
    self.fileProperties = [[[FilePropertiesViewController alloc] initWithNibName:@"FilePropertiesViewController" bundle:nil]autorelease];
    fileProperties.delegate = self;
    self.filePropertiesPopover = [[[UIPopoverController alloc] initWithContentViewController:fileProperties]autorelease];
    [_docsegmentmodels objectAtIndex:_docSegmentedControl.selectedSegmentIndex];
}

fileProperties.docProperties = _docsegmentmodels;
fileProperties.index = _docSegmentedControl.selectedSegmentIndex; //index utk nilai2 di textfield
[self.filePropertiesPopover presentPopoverFromBarButtonItem:sender 
                                   permittedArrowDirections:UIPopoverArrowDirectionUp
                                                   animated:YES];

}

- (IBAction)docSegmentAction:(id)sender{
NSLog(@"open file");
isFileOpen = YES;
[self.moreFilePopOverController dismissPopoverAnimated:YES];
[self.filePropertiesPopover dismissPopoverAnimated:YES];

[self showTextView];

}

我的理解是否有任何错误？

Answer 1

在您的情况下，您不需要UIGestureRecognizer。只需将barbuttonitem的动作设置为点击按钮时应该调用的方法。让方法跟踪textview的状态，并根据它显示或显示popover。