ios - 太多样板代码 switch 语句 - iOS

Question

我有一个 switch 语句，可以适本地将文本添加到 11 个 UILabel。然而，它现在变得有点长，而且相同代码的副本太多了。我怎样才能进一步改进它？我可以制作一个标签数组，然后通过 for 循环访问它们吗？？

这是代码切换语句:

switch ([number_sorted count]) {

            case 1:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                break;

            case 2:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                break;

            case 3:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                break;

            case 4:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                break;

            case 5:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                break;

            case 6:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                break;

            case 7:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
                break;

            case 8:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
                label_8.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[7] integerValue]];
                break;

            case 9:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
                label_8.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[7] integerValue]];
                label_9.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[8] integerValue]];
                break;

            case 10:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
                label_8.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[7] integerValue]];
                label_9.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[8] integerValue]];
                label_10.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[9] integerValue]];
                break;

            case 11:
                label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
                label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
                label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
                label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
                label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
                label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
                label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
                label_8.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[7] integerValue]];
                label_9.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[8] integerValue]];
                label_10.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[9] integerValue]];
                label_11.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[10] integerValue]];
                break;

            default:
                break;
        }

谢谢你抽出时间，丹。

Answer 1

另一种选择是使用 switch 语句的“fall through”属性

switch ([number_sorted count]) {
    case 11:
        label_11.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[10] integerValue]];
    case 10:
        label_10.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[9] integerValue]];
    case 9:
        label_9.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[8] integerValue]];
    case 8:
        label_8.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[7] integerValue]];
    case 7:
        label_7.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[6] integerValue]];
    case 6:
        label_6.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[5] integerValue]];
    case 5:
        label_5.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[4] integerValue]];
    case 4:
        label_4.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[3] integerValue]];
    case 3:
        label_3.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[2] integerValue]];
    case 2:
        label_2.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[1] integerValue]];
    case 1:
        label_1.text = [NSString stringWithFormat:@"%ld", (long)[number_sorted[0] integerValue]];
    default:
        break;
}