1

我试图在表格视图单元格中显示带有接受按钮和拒绝按钮（作为子视图）的自定义视图。我实现了以下代码：

tableView: cellForRowAtIndexPath: method

...
if ([status isEqualToString:@"pending"] || [status isEqualToString:@"declined"]){
    cell.accessoryView = [self setAccessoryViewForCell:cell];
} else {
    cell.accessoryType = UITableViewCellAccessoryNone;
}
...

- (UIView *)setAccessoryViewForCell:(UITableViewCell *)cell
{
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(192, 0, 128, 44)];
    UIButton *acceptButton = [[UIButton alloc] initWithFrame:CGRectMake(2, 5, 60, 34)];
    UIButton *declineButton = [[UIButton alloc] initWithFrame:CGRectMake(66, 5, 60, 34)];
    [acceptButton setTitle:@"A" forState:UIControlStateNormal];
    [declineButton setTitle:@"D" forState:UIControlStateNormal];
    [acceptButton addTarget:self action:@selector(acceptButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    [declineButton addTarget:self action:@selector(declineButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    [view addSubview:acceptButton];
    [view addSubview:declineButton];
    return view;
}

我试图调试它，但方法被适当地调用。

4

2 回答 2

0

最后，问题不在于 cellForRowAtIndexPath: 方法，而在于 setAccessoryViewForCell: 方法。在创建包含两个按钮作为子视图的视图时，我真的不应该对框架使用文字值。我没有为附件视图属性设置视图，而是重写了整个 cellForRowAtIndexPath: 方法，并将子视图添加到单元格的 contentView。

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {
    static NSString *identifier = @"notificationsCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
    }
    PFObject *user = [self.objects objectAtIndex:indexPath.row];
    NSString *firstName = [user objectForKey:@"firstName"];
    NSString *lastName = [user objectForKey:@"lastName"];
    cell.textLabel.text = [NSString stringWithFormat:@"%@ %@", firstName, lastName];

    UIView *view = [UIView new];
    view.frame = CGRectMake(230, 2, 80, 40);
    view.backgroundColor = [UIColor whiteColor];

    UIButton *acceptButton = [UIButton buttonwithType:UIButtonTypeCustom];
    UIButton *declineButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [acceptButton setTitle:@"" forState:UIControlStateNormal];
    [declineButton setTitle:@"" forState:UIControlStateNormal];
    [acceptButton setImage:[UIImage imageNamed:@"Ok.png"] forState:UIControlStateNormal];
    [declineButton setImage:[UIImage imageNamed:@"Close.png"] forState:UIControlStateNormal];
    [acceptButton addTarget:self action:@selector(acceptButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    [declineButton addTarget:self action:@selector(declineButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    acceptButton.frame = CGRectMake(CGRectGetMinX(view.bounds), CGRectGetMinY(view.bounds), CGRectGetWidth(view.bounds)/2, CGRectGetHeight(view.bounds));
    declineButton.frame = CGRectMake(CGRectGetMidX(view.bounds), CGRectGetMinY(view.bounds), CGRectGetWidth(view.bounds)/2, CGRectGetHeight(view.bounds));

    [view addSubview:acceptButton];
    [view addSubview:declineButton];
    [cell.contentView addSubview:view];

    return cell;
 }

主要区别在于，在为每个按钮设置框架时，我使用了文字值（不是一个好习惯），现在我使用了 CGRect 函数 CGRectGetMinX(CGRect rect)、CGRectGetMinY(CGRect rect)、CGRectGetWidth(CGRect rect)、CGRectGetMidX( CGRect rect) 和 CGRectGetHeight(CGRect rect) 以获得更准确的值来设置每个按钮的框架。这是对 UIView 框架如何工作的误解，我建议始终使用这些函数来获取子视图的原点和大小，而不是使用文字值。

于 2014-12-22T18:58:08.627 回答
-1

问题似乎是您没有从setAccessoryViewForCell方法返回 UIView。

return view;

请从上述方法返回视图，它可能会解决您的问题。

于 2014-11-21T20:56:33.123 回答