ios - 相同的代码在一个项目中有效，在另一个项目中无效

Question

我正在做一个项目，它有一个静态 TableView 。此 TableView 包含三个部分，每个部分都有不同的行数。我正在使用一个代码，它允许同时选择不同部分的不同行，但不能从同一部分选择两个不同的行。这是代码:

switch indexPath.section {
    case 0:
        switch indexPath.row {
        case 0:
            oneDollarRestaurantCell.accessoryType = .checkmark
            oneDollarRestaurantCell.isSelected = true
            twoDollarRestaurantCell.accessoryType = .none
            twoDollarRestaurantCell.isSelected = false
            threeDollarRestaurantCell.accessoryType = .none
            threeDollarRestaurantCell.isSelected = false
            fourDollarRestaurantCell.accessoryType = .none
            fourDollarRestaurantCell.isSelected = false
        case 1:
            twoDollarRestaurantCell.accessoryType = .checkmark
            twoDollarRestaurantCell.isSelected = true
            oneDollarRestaurantCell.accessoryType = .none
            oneDollarRestaurantCell.isSelected = false
            threeDollarRestaurantCell.accessoryType = .none
            threeDollarRestaurantCell.isSelected = false
            fourDollarRestaurantCell.accessoryType = .none
            fourDollarRestaurantCell.isSelected = false
        case 2:
            threeDollarRestaurantCell.accessoryType = .checkmark
            threeDollarRestaurantCell.isSelected = true
            twoDollarRestaurantCell.accessoryType = .none
            twoDollarRestaurantCell.isSelected = false
            oneDollarRestaurantCell.accessoryType = .none
            oneDollarRestaurantCell.isSelected = false
            fourDollarRestaurantCell.accessoryType = .none
            fourDollarRestaurantCell.isSelected = false
        case 3:
            fourDollarRestaurantCell.accessoryType = .checkmark
            fourDollarRestaurantCell.isSelected = true
            twoDollarRestaurantCell.accessoryType = .none
            twoDollarRestaurantCell.isSelected = false
            threeDollarRestaurantCell.accessoryType = .none
            threeDollarRestaurantCell.isSelected = false
            oneDollarRestaurantCell.accessoryType = .none
            oneDollarRestaurantCell.isSelected = false
        default:
            break

        }
    case 1:
        switch indexPath.row {
        case 0:
            within500MetersCell.accessoryType = .checkmark
            within500MetersCell.isSelected = true
            within1000MetersCell.accessoryType = .none
            within1000MetersCell.isSelected = false


        case 1:
            within1000MetersCell.accessoryType = .checkmark
            within1000MetersCell.isSelected = true
            within500MetersCell.accessoryType = .none
            within500MetersCell.isSelected = false

        default:
            break
        }
    case 2:
        switch indexPath.row {
        case 0:
            sortByFromAtoZCell.accessoryType = .checkmark
            sortByFromAtoZCell.isSelected = true
            sortByFromZtoACell.accessoryType = .none
            sortByFromZtoACell.isSelected = false
            sortByDistanceCell.accessoryType = .none
            sortByDistanceCell.isSelected = false
            sortByPriceCell.accessoryType = .none
            sortByPriceCell.isSelected = false
        case 1:
            sortByFromZtoACell.accessoryType = .checkmark
            sortByFromZtoACell.isSelected = true
            sortByFromAtoZCell.accessoryType = .none
            sortByFromAtoZCell.isSelected = false
            sortByDistanceCell.accessoryType = .none
            sortByDistanceCell.isSelected = false
            sortByPriceCell.accessoryType = .none
            sortByPriceCell.isSelected = false
        case 2:
            sortByDistanceCell.accessoryType = .checkmark
            sortByDistanceCell.isSelected = true
            sortByFromZtoACell.accessoryType = .none
            sortByFromZtoACell.isSelected = false
            sortByFromAtoZCell.accessoryType = .none
            sortByFromAtoZCell.isSelected = false
            sortByPriceCell.accessoryType = .none
            sortByPriceCell.isSelected = false
        case 3:
            sortByPriceCell.accessoryType = .checkmark
            sortByPriceCell.isSelected = true
            sortByFromZtoACell.accessoryType = .none
            sortByFromZtoACell.isSelected = false
            sortByDistanceCell.accessoryType = .none
            sortByDistanceCell.isSelected = false
            sortByFromAtoZCell.accessoryType = .none
            sortByFromAtoZCell.isSelected = false

        default:
            break
        }

    default:
        break
    }

}

我在这里检查部分，并在其中检查每一行。这工作正常，但突然停止了。

已编辑

预期结果如下:

实际结果如下:

我没有更改该类中的任何内容。相同的代码在另一个项目中仍然有效，所以我很绝望，因为我不明白是什么导致了这个问题。我已经尝试了一切，甚至将文件从工作项目复制到这个项目(文件结构完全相同)。你有什么建议吗？

Answer 1

据我所知，您提供的示例之间的主要区别在于多项选择。要为 UITableView 启用此功能，您可以在属性检查器中将 selection 属性的值设置为 multiple selection。

您还可以通过将 allowsMultipleSelection 属性设置为 true 来覆盖此参数。我不完全确定，但我怀疑在您的第一个项目中，此属性是在代码中设置的。