UITablevlewCell 内 UIImageView 上的 UITapGestureRecognizer 未被调用

Question

我目前有一个自定义 UITableViewCell，其中包含 UIImageView 并尝试在 UIImageView 上添加 UITapGestureRecognizer，但没有成功。这是代码片段。

//within cellForRowAtIndexPath (where customer table cell with imageview is created and reused)
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleImageTap:)];
tap.cancelsTouchesInView = YES;
tap.numberOfTapsRequired = 1;
tap.delegate = self;
[imageView addGestureRecognizer:tap];
[tap release];

// handle method
- (void) handleImageTap:(UIGestureRecognizer *)gestureRecognizer {
    RKLogDebug(@"imaged tab");
}

我还在单元格和 UIImageView 的超级视图上设置了 userInteractionEnabled 但仍然没有运气，有什么提示吗？

编辑：

我还通过 cell.selectionStyle = UITableViewCellSelectionStyleNone; 删除了单元格的选择；这可能是个问题吗

Answer 1

UIImageView 的用户交互默认情况下处于禁用状态。您必须显式启用它才能响应触摸。

imageView.userInteractionEnabled = YES;

Answer 2

Swift 3

这对我有用：

self.isUserInteractionEnabled = true

Answer 3

就我而言，它看起来像：

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSString *cellIdentifier = CELL_ROUTE_IDENTIFIER;
    RouteTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

    if (cell == nil) {
        cell = [[RouteTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                         reuseIdentifier:cellIdentifier];
    }

    if ([self.routes count] > 0) {
        Route *route = [self.routes objectAtIndex:indexPath.row];

        UITapGestureRecognizer *singleTapOwner = [[UITapGestureRecognizer alloc] initWithTarget:self
                                                                                    action:@selector(imageOwnerTapped:)];
        singleTapOwner.numberOfTapsRequired = 1;
        singleTapOwner.cancelsTouchesInView = YES;
        [cell.ownerImageView setUserInteractionEnabled:YES];
        [cell.ownerImageView addGestureRecognizer:singleTapOwner];
    } else {
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    return cell;
}

和选择器：

- (void)imageOwnerTapped:(UISwipeGestureRecognizer *)gesture {
    CGPoint location = [gesture locationInView:self.tableView];
    NSIndexPath *tapedIndexPath = [self.tableView indexPathForRowAtPoint:location];
    UITableViewCell *tapedCell  = [self.tableView cellForRowAtIndexPath:tapedIndexPath];

    NSIndexPath *indexPath = [self.tableView indexPathForCell:tapedCell];
    NSUInteger index = [indexPath row];

    Route *route = [self.routes objectAtIndex:index];
}