我已经阅读了有关 UITouch 和 UIGestureRecognizer 的信息，但我仍然很困惑它们之间的区别。我有一个案例。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。如果我执行单点操作，我想显示一个文本视图，但是当我再次执行单点操作时，我想显示该按钮的弹出窗口。有没有人可以给我一个示例代码来做它并解释一下 UITouch 和 UIGestureRecognizer 之间的区别是什么？？？
更新
barbuttonitem 是 UISegmentedControl 的包装，这是来自 desain 的图片
我试图使用 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。这是我制作的代码：
-(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];
}
我的理解有什么错误吗？