Question

当我点击放在单元格中的按钮时，我想得到单元格中显示内容的一些数据。为此，我实现了使用indexPathForSelectedRow方法。但是当我点击单元格时，该方法返回0索引，即使我没有点击第0个索引单元格。这是我用于按钮的代码 -

- (IBAction)dataSaveLounge:(id)sender {

NSIndexPath *path = [self.loungeTable indexPathForSelectedRow];

NSString *titleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"title"];

NSString *subtitleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"excerpt"];

NSString *idSave = [[loungeData objectAtIndex:path.row] valueForKey:@"id"];


saveMdl = [FavouritesModel saveFavourites:titleSave and:subtitleSave and:idSave];

}

编辑：添加了cellfForRowAtIndex方法

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

static NSString *loungeCellID = @"MyCellLounge";
LoungeTableCell *loungeCell = [tableView dequeueReusableCellWithIdentifier:loungeCellID];

if (loungeCell == nil) {

    loungeCell = [[LoungeTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"MyCellLounge"];
}

loungeCell.loungeTitle.text = [[loungeData objectAtIndex:indexPath.row]valueForKey:@"title"];
loungeCell.loungeSubtitle.text = [[loungeData objectAtIndex:indexPath.row]valueForKey:@"excerpt"];

dispatch_async(dispatch_get_main_queue(), ^{

    loungeCell.loungeImgView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"default"]];

    [loungeCell.loungeImgView sd_setImageWithURL:[NSURL URLWithString:[[loungeData objectAtIndex:indexPath.row] valueForKey:@"banner_image"]]];
});

return  loungeCell;
}

我在按钮点击时将一些数据保存在核心数据中，因此最后一个方法调用

Answer 1

如果您单击行中的按钮，请尝试此操作设置按钮标记

cell.button.tag = indexPath.row 
[cell.button addTarget:self action:@selector(dataSaveLounge:) forControlEvents:UIControlEventTouchUpInside];

在 cellForRowAtIndexPath

中

- (IBAction)dataSaveLounge:(id)sender {
UIButton *pressedButton = (UIButton *)sender;
   NSLog(@"Tag of button pressed:%d",pressedButton.tag);
}

Answer 2

在cellForRowAtIndexPath

中设置按钮标记

例如loungeCell.btn = indexPath.row;// set your button IBOutlet name here

然后访问

- (IBAction)dataSaveLounge:(id)sender {

    UIButton *btn = (UIButton *)sender;


    NSString *titleSave = [[loungeData objectAtIndex:btn.tag] valueForKey:@"title"];

    NSString *subtitleSave = [[loungeData objectAtIndex:btn.tag] valueForKey:@"excerpt"];

    NSString *idSave = [[loungeData objectAtIndex:btn.tag] valueForKey:@"id"];


    saveMdl = [FavouritesModel saveFavourites:titleSave and:subtitleSave and:idSave];

    }

Answer 3

尝试以下代码：

用以下方法替换dataSaveLounge方法：

- (IBAction)dataSaveLounge:(id)sender {

  CGPoint center= sender.center; 
  CGPoint viewPoint = [sender.superview convertPoint:center toView:self.loungeTable];
  NSIndexPath *path = [self.loungeTable indexPathForRowAtPoint:viewPoint];


  NSString *titleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"title"];

  NSString *subtitleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"excerpt"];

  NSString *idSave = [[loungeData objectAtIndex:path.row] valueForKey:@"id"];


  saveMdl = [FavouritesModel saveFavourites:titleSave and:subtitleSave and:idSave];

}

OR

- (IBAction)dataSaveLounge:(id)sender {

      CGPoint btnPosition = [sender convertPoint:CGPointZero
                                   toView:self.tableView];
      NSIndexPath *path = [self.loungeTable indexPathForRowAtPoint:btnPosition];



      NSString *titleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"title"];

      NSString *subtitleSave = [[loungeData objectAtIndex:path.row] valueForKey:@"excerpt"];

      NSString *idSave = [[loungeData objectAtIndex:path.row] valueForKey:@"id"];


      saveMdl = [FavouritesModel saveFavourites:titleSave and:subtitleSave and:idSave];

    }

Answer 4

在UITableView中为此目的使用标记是有风险的。如果添加或删除任何行，标记将不会在现有可见行上更改，并且您将指向错误的索引。

请参阅此答案以获得更好的解决方案https://stackoverflow.com/a/43036216/1189470

Answer 5

您也可以这样获得NSIndexPath。如果您有多个部分，此代码也可以帮助您。并确保LoungeTableCell

中的按钮层次结构

- (IBAction)dataSaveLounge:(id)sender {
     LoungeTableCell *cell = (LoungeTableCell *) sender.superview.superview;
     NSIndexPath *path =  [self.loungeTable indexPathForCell:cell];
}

indexPathForSelectedRow返回错误的索引

5 个答案: