Question

我有UIButton在UITableView的每个部分标题中收到操作。当点击发生时，我需要能够获得它是否击中了不是单元格的东西，所以我设置了他的代码：

UITouch *touch = [[event touchesForView:deleteButton] anyObject];
CGPoint location = [touch locationInView:self.tableView];
if (![self.tableView indexPathForRowAtPoint:location]) {
  //stuff
}

每次点击节标题按钮时，该函数都会返回相应节中第一行的索引路径。为了弄清楚发生了什么，我编写了这部分

UITouch *touch = [[event touchesForView:deleteButton] anyObject];
CGPoint location = [touch locationInView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
CGRect frame = [self.tableView rectForRowAtIndexPath:indexPath];
NSLog(@"\nSection: %ld\nRow:%ld\nTouch: %.f\nRange: %.1f-%.1f\n\n", indexPath.section, indexPath.row, location.y, frame.origin.y, frame.origin.y + frame.size.height);

日志会以此为例返回：

部分：1 行：0 触摸：192.0 范围：220.0-264.0

意思是即使触摸超出了单元格的矩形，它也会触及索引路径。好奇的是，第一部分也发生了这个问题，确实设法进入if结构。

重要的代码是节头功能：

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
  UIView *headerView = [UIView new];
  UILabel *headerLabel = [UILabel new];
  headerLabel.frame = CGRectMake(ZTRowPadding, 2.0, CGRectGetWidth(tableView.frame) - 2 * ZTRowPadding - ZTSectionHeaderHeight, 40.0);
  headerLabel.text = [self.wod.wSets[section] fullSizeSectionTitle:NO];
  headerLabel.textColor = [UIColor carbonColorWithAlpha:ZTAlphaLevelFull];
  headerLabel.font = [UIFont fontWithName:@"AvenirNext-Regular" size:13.0];
  headerLabel.numberOfLines = 2;
  [headerView addSubview:headerLabel];

  UIButton *deleteButton = [UIButton new];
  deleteButton.frame = CGRectMake(CGRectGetWidth(tableView.frame) - ZTSectionHeaderHeight, 0.0, ZTSectionHeaderHeight, ZTSectionHeaderHeight);
  deleteButton.backgroundColor = [UIColor crimsonColorWithAlpha:ZTAlphaLevelFull];
  [deleteButton setTitle:@"X" forState:UIControlStateNormal];
  [deleteButton setTitleColor:[UIColor ivoryColorWithAlpha:ZTAlphaLevelFull] forState:UIControlStateNormal];
  [deleteButton addTarget:self action:@selector(deleteSectionButtonTapped:forEvent:) forControlEvents:UIControlEventTouchUpInside];
  [headerView addSubview:deleteButton];

  return headerView;
}

和删除按钮操作。

- (void)deleteSectionButtonTapped:(UIButton *)deleteButton forEvent:(UIEvent *)event {
  UITouch *touch = [[event touchesForView:deleteButton] anyObject];
  CGPoint location = [touch locationInView:self.tableView];
  NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:location];
  CGRect frame = [self.tableView rectForRowAtIndexPath:indexPath];
  NSLog(@"\nSection: %ld\nRow:%ld\nTouch: %.f\nRange: %.1f-%.1f\n\n", indexPath.section, indexPath.row, location.y, frame.origin.y, frame.origin.y + frame.size.height);

  if (![self.tableView indexPathForRowAtPoint:location]) {
    for (NSInteger section = 0; section < [self.wod.wSets count]; section++) {
      CGRect headerViewRect = [self.tableView rectForHeaderInSection:section];
      if(CGRectContainsPoint (headerViewRect, location)) {
        ZTWodSet *wodSet = self.wod.wSets[section];
        [self.wod removeObject:wodSet fromOrderedSetWithKey:@"wSets"];

        [[ZTDataManager sharedDataManager].mainContext deleteObject:wodSet];
        NSError *error;
        if (![[ZTDataManager sharedDataManager].mainContext save:&error]) {
          NSLog(@"Failed to save data");
          return;
        }

        [self.tableView beginUpdates];
        [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationFade];
        [self.tableView endUpdates];
        break;
      }
    }
  }
}

Answer 1

我所做的是使用带有section实例变量的UITableViewHeaderFooterView子类作为我的标题视图（根本没有代码）。当我创建每个请求的标头时，我设置了section。因此，我知道只需查看section哪个标题被点击。

无法从tableView中的点确定节标题

1 个答案: