标题更改后重复上一个 UITableViewCell

Question

我正在创建自己的个人预算应用程序，该应用程序将商店、花费的金额、日期等数据放到表格中。我按strftime %W 对条目进行排序。我按%W排序的数据字典是：

_results =

{ 
  46 =  (
            {
              DATE = "11/13/2019";
              ID = 10;
              PLACE = Test;
              PRICE = "43.23";
            },
            {
              DATE = "11/15/2019";
              ID = 11;
              PLACE = OneMore;
              PRICE = "32.12";
            }
       );
  47 =  (
            {
              DATE = "11/18/2019";
              ID = 12;
              PLACE = Kroger;
              PRICE = "54.32";
            }
        );
}

我的 UITableView 设置是：

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return [_resultsTitles count];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    return [[_resultsTitles objectAtIndex:section] stringValue];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//     return self.arrFoodInfo.count;
    NSNumber *sectionTitle = [_resultsTitles objectAtIndex:section];
    NSArray *sectionAnimals = [_results objectForKey:sectionTitle];
    return [sectionAnimals count];
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return 60.0;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    // Dequeue the cell.
    static NSString *identifier = @"idCellRecord";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
    }

    // Set the loaded data to the appropriate cell labels.
    cell.textLabel.text = [NSString stringWithFormat:@"%@ | $%@", [[self.arrFoodInfo objectAtIndex:indexPath.row] valueForKey:@"PLACE"], [[self.arrFoodInfo objectAtIndex:indexPath.row] valueForKey:@"PRICE"]];

    cell.detailTextLabel.text = [NSString stringWithFormat:@"Date: %@", [[self.arrFoodInfo objectAtIndex:indexPath.row] valueForKey:@"DATE"]];

    return cell;
}

运行我的应用程序时，表头是正确的，但是在下一节中“添加”一个条目时，第一个条目是重复的。

是否有正确的条目按周数分组显示？

Answer 1

可以通过在cellForRowAtIndexPath 中添加以下内容来解决：

NSNumber *sectionTitle = [_resultsTitles objectAtIndex:indexPath.section];
NSArray *sectionResults = [_results objectForKey:sectionTitle];
NSString *cellData = [sectionResults objectAtIndex:indexPath.row];

现在看起来像：

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    // Dequeue the cell.
    static NSString *identifier = @"idCellRecord";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
    }

    NSNumber *sectionTitle = [_resultsTitles objectAtIndex:indexPath.section];
    NSArray *sectionResults = [_results objectForKey:sectionTitle];
    NSString *cellData = [sectionResults objectAtIndex:indexPath.row];

    // Set the loaded data to the appropriate cell labels.
    cell.textLabel.text = [cellData valueForKey:YourValHere];

    return cell;
}

Answer 2

self.arrFoodInfo 来自哪里？

我猜 self.arrFoodInfo 有这个数据：

(
        {
          DATE = "11/13/2019";
          ID = 10;
          PLACE = Test;
          PRICE = "43.23";
        },
        {
          DATE = "11/15/2019";
          ID = 11;
          PLACE = OneMore;
          PRICE = "32.12";
        }
        {
          DATE = "11/18/2019";
          ID = 12;
          PLACE = Kroger;
          PRICE = "54.32";
        }
   );

每一节的indexPath.row是不同的，当移动到下一节时，indexPath.row会重新开始到零。 p>

你应该更新绑定数据的方式或者重构self.arrFoodInfo列表，比如JSON中这样的例子：

[
  [
    {
      "DATE": "11/13/2019",
      "ID": 10,
      "PLACE": "Test",
      "PRICE": "43.23"
    },
    {
      "DATE": "11/15/2019",
      "ID": 11,
      "PLACE": "OneMore",
      "PRICE": "32.12"
    }
  ],
  [
    {
      "DATE": "11/18/2019",
      "ID": 12,
      "PLACE": "Kroger",
      "PRICE": "54.32"
    }
  ]
]