自定义uitableviewcell内的按钮不起作用

Question

我有一个自定义的TableCell，UiButton通过IB与此相关联。 但是按钮操作方法总是将按钮索引返回为零

以下是我的代码

//Inside CellForRow
[cell.M_CtrlBtnChat addTarget: self
                       action: @selector(buttonPressed:withEvent:)
             forControlEvents: UIControlEventTouchUpInside];


- (void) buttonPressed: (id) sender withEvent: (UIEvent *) event
{

    UITouch * touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView: self.tableView];
    NSIndexPath * indexPath = [self.tableView indexPathForRowAtPoint: location];
    NSLog(@"%d", indexPath.row);
}

索引路径始终返回零。 任何想法 。 请帮我

Answer 1

[cell.M_CtrlBtnChat addTarget: self
                       action: @selector(buttonPressed:withEvent:)
             forControlEvents: UIControlEventTouchUpInside];
 cell.M_CtrlBtnChat.tag = indexPath.row;


- (void) buttonPressed: (id) sender withEvent: (UIEvent *) event
{

    UIButton *btn = (UIButton *)sender;
    NSLog(@"btn.tag %d",btn.tag);
    UITouch * touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView: self.tableView];
    NSIndexPath * indexPath = [self.tableView indexPathForRowAtPoint: location];
    NSLog(@"%d", indexPath.row);
}

试试这可能会对你有所帮助。

Answer 2

我有同样的问题，并尝试了一切。 最终做到的是实现该方法

(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

只需返回自定义单元格的高度（查看NIB文件）

Answer 3

- (void) buttonPressed: (id) sender withEvent: (UIEvent *) event
{
     CGPoint touchPoint = [sender convertPoint:CGPointZero toView:self.mMessagesTable];
     NSIndexPath *indexPath = [self.mMessagesTable indexPathForRowAtPoint:touchPoint];
     NSLog(@"%d", indexPath.row);
}

以编程方式的按钮代码

UIButton *mNewMsgDwn = [UIButton buttonWithType:UIButtonTypeCustom];
[mNewMsgDwn setImage:[UIImage imageNamed:@"new_message.png"] forState:UIControlStateNormal];
[mNewMsgDwn addTarget:self action:@selector(newMsg) forControlEvents:UIControlEventTouchUpInside];
mNewMsgDwn.frame = CGRectMake(179, 357, 137, 27);
[self.view addSubview:mNewMsgDwn];

Answer 4

尝试使用这个波纹管代码..

- (void) buttonPressed: (id) sender withEvent: (UIEvent *) event
{
    UIButton *button = (UIButton *)sender;
    UITableViewCell *cell = (UITableViewCell *)button.superview;
    UITableView *tableView = (UITableView *)cell.superview;
    NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
    NSLog(@"%d", indexPath.row);
}

要么

UIButton *button = (UIButton *)sender;
CGRect buttonFrame = [button convertRect:button.bounds toView:self.tableView];
NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:buttonFrame.origin];

或整个示例，以编程方式在单元格中添加自定义按钮

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
         .......
    cell.textLabel.text = [NSString stringWithFormat:@"Cell #%i", indexPath.row + 1];

    //Create the button and add it to the cell
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self
               action:@selector(customActionPressed:)
     forControlEvents:UIControlEventTouchDown];
    [button setTitle:@"Custom Action" forState:UIControlStateNormal];
    button.frame = CGRectMake(150.0f, 5.0f, 150.0f, 30.0f);
    [cell addSubview:button];

    return cell;
}

并使用波纹管代码获取索引路径...

//Get the superview from this button which will be our cell
UITableViewCell *tblCell = (UITableViewCell*)[sender superview];

//From the cell get its index path.
NSIndexPath *indexPathE = [myTableView indexPathForCell:tblCell];
NSLog(@"%d", indexPathE.row);