添加手势识别器到tableView标头不起作用？ [英] Add a gesture recognizer to tableView header doesn't work?

问题描述

我知道表格视图标题（表格视图的最顶部）是一个View
所以我尝试添加一个UITapGestureRecognizer，但它不起作用......

I know that a "table view header"(the most top-part of a table view) is a View So I try to add a UITapGestureRecognizer to it ,but it doesn't work...

代码很简单：

- (void)tap:(UITapGestureRecognizer *)recognizer
{
    // do something
}

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc]    initWithTarget:self action:@selector(tap:)];
[self.tableView.tableHeaderView addGestureRecognizer:recognizer];

这里有什么提示要小心吗？非常感谢

Any tips here to care ? thanks a lot

推荐答案

这对我有用：
相反添加：

Here's the thing that works for me: Instead adding this:

self.tableView.tableHeaderView

<我在tableview上的每个UILabel上都添加了手势识别器。

I add gesture recognizer on every UILabel on tableview.

    -(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{

    UILabel *headerLabel = [[UILabel alloc]init];
    headerLabel.tag = section;
    headerLabel.userInteractionEnabled = YES;
    headerLabel.backgroundColor = [UIColor greenColor];
    headerLabel.text = [NSString stringWithFormat:@"Header No.%d",section];
    headerLabel.frame = CGRectMake(0, 0, tableView.tableHeaderView.frame.size.width, tableView.tableHeaderView.frame.size.height);


    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(catchHeaderGesture:)];
    tapGesture.cancelsTouchesInView = NO;
    [headerLabel addGestureRecognizer:tapGesture];

    return headerLabel;

    //return nil;
}

-(void)catchHeaderGesture:(UIGestureRecognizer*)sender
{
    UILabel *caughtLabel = (UILabel*)sender.view;

    NSLog(@"header no : %d", caughtLabel.tag);
}

我希望有所帮助。

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