我必须UITableView显示一些列表。实施UILongPressGestureRecognizer以接听电话，在此我想显示删除、上传等操作的菜单。
以下是实现
// Registering for long press event
UILongPressGestureRecognizer *lpgr = [[UILongPressGestureRecognizer alloc]
initWithTarget:self
action:@selector(handleLongPress:)];
lpgr.delegate = self;
[self.myTable addGestureRecognizer:lpgr];
长按我的控制功能
- (IBAction)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
if (gestureRecognizer.state == UIGestureRecognizerStateBegan)
{
CGPoint p = [gestureRecognizer locationInView:self.playbackTable];
NSIndexPath *indexPath = [self.playbackTable indexPathForRowAtPoint:p];
if (indexPath == nil)
{
NSLog(@"long press on table view but not on a row");
}
else
{
NSLog(@"long press on table view at section %d row %d", indexPath.section, indexPath.row);
CGPoint p = [gestureRecognizer locationInView: self.myTable];
NSIndexPath *indexPath = [self.myTable indexPathForRowAtPoint:p];
if (indexPath != nil)
{
if([self becomeFirstResponder])
{
UIMenuItem *delete = [[UIMenuItem alloc] initWithTitle:@"Delete" action:@selector(deleteFileListItem:)];
menu = [UIMenuController sharedMenuController];
[menu setMenuItems:[NSArray arrayWithObjects:delete, nil]];
[menu setTargetRect:[self.myTable rectForRowAtIndexPath:indexPath] inView:self.myTable];
[menu setMenuVisible:YES animated:YES];
}
}
}
}
}
我还实现了以下方法
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (action == @selector(deleteFileListItem:))
{
return YES;
}
return NO;
}
-(BOOL)canBecomeFirstResponder
{
return YES;
}
和
- (void)deleteFileListItem:(id)sender
{
// Will perform action here
}
请让我知道是否有任何遗漏或我做错了。