自定義uitableviewcell內的按鈕不起作用

Question

我有一個自定義的TableCell，UiButton通過IB與此相關聯。 但是按鈕操作方法總是將按鈕索引返回為零

以下是我的代碼

//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);
}

索引路徑始終返回零。 任何想法 。 請幫我

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);
}

試試這可能會對你有所幫助。

Answer 2

我有同樣的問題，並嘗試了一切。 最終做到的是實現該方法

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

只需返回自定義單元格的高度（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);
}

以編程方式的按鈕代碼

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

嘗試使用這個波紋管代碼..

- (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];

或整個示例，以編程方式在單元格中添加自定義按鈕

- (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;
}

並使用波紋管代碼獲取索引路徑...

//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);