Question

当我点击一个按钮时，我试图找到UITableViewCell的IndexPath，它看起来不容易，因为我也使用了UIAlert。这是我正在使用的代码：

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";


    UpdatesTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {

        NSArray* views = [[NSBundle mainBundle] loadNibNamed:@"UpdatesTableViewCell" owner:nil options:nil];

        for (UIView *view in views) {
            if([view isKindOfClass:[UITableViewCell class]])
            {
                cell = (UpdatesTableViewCell*)view;
            }
        }
    }


    cell.textLabel.text = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Title"];
    cell.detailTextLabel.text = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Description"];

    //////////This button is the one sending the action////////////////
    [cell.deletebutton addTarget:self action:@selector(deletetherow:) forControlEvents:UIControlEventTouchUpInside];


    imagepath = [[dao libraryItemAtIndex:indexPath.row] valueForKey:@"Photo"];

    if([imagepath isEqualToString:@"(null)"])
    {
        cell.imageView.image = [UIImage imageNamed:@"noimage.png"];
        cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
        cell.imageView.clipsToBounds = YES; 

    }
    else {

        cell.imageView.image = [[[UIImage alloc] initWithContentsOfFile:imagepath] autorelease];

    }
    cell.backgroundColor = [UIColor clearColor];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    return cell;

}

- (void)deletetherow:(id)sender{

UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Title"
                                                  message:@"Delete it ?"
                                                 delegate:self
                                        cancelButtonTitle:@"Cancel"
                                        otherButtonTitles:@"delete", nil];
[message show];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];

if([title isEqualToString:@"Eliminar"])
{

        NSLog(@"OFFLINE");
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);        
        NSString *documentsDirectory = [paths objectAtIndex:0];        
        NSString *path = [documentsDirectory stringByAppendingPathComponent:@"datatesting.plist"];
        libraryContent = [[NSMutableArray alloc] initWithContentsOfFile:path];
        [libraryContent removeObjectAtIndex:0]; ///// Here instead 0, I want to put the indexpath to know what row content to delete.
        NSLog(@"delete the Row:%@",libraryContent);
        [libraryContent writeToFile:path atomically:YES];

        dao = [[Dfetch alloc] initWithLibraryName:@"Diario"];
        [self.tableviewnew reloadData];

    }
  }
}

所以我的问题是，如何在alertView方法中获取indexpath.row？

Answer 1

你可以给UIButton一个标签，并用indexPath.row标记它，然后当你按下按钮时，只需从（id）发送者对象中检索它，然后从那里检索标签。

Answer 2

我不确定我是否得到了你的问题，但是为了将值传递给方法，你有很多可能性：

声明一个实例变量，赋值，并在方法
声明一个全局变量（糟糕的想法！），分配值，并在方法中使用它
将其用作方法的参数（仅当方法签名未强制执行时，例如通过协议）

如何获取索引路径？

2 个答案: