Switch判断NSString

  //待判断的字符
    NSString *theString = @"item3";
    //将所有可能性放入数组中
    NSArray *items = @[@"item1", @"item2", @"item3"];

    int item = [items indexOfObject:theString];
    switch (item)
    {
        case 0: // Item 1
            break;
        case 1: // Item 2
            break;
        case 2: //Item 3
            break;
        default:
        break;
    }