Question

我想在TableView上找到组织名称，并找到有关DetailView的更多信息。但我不知道哪里出错，DetailView找不到我的信息。这是didSelectRow代码：

TableView：

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    switch (section) {
        case 0:
            return 2;
            break;
        case 1:
            return 2;
            break;
        case 2:
            return 2;
            break;
    }
    return 0;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    NSString *sectionHeader = nil;    if(section == 0) {
        sectionHeader = @"Red Wine";
    }
    if(section == 1) {
        sectionHeader = @"White Wine";
    }
    if(section == 2) {
        sectionHeader = @"Sparkling Wine";
    }
    return sectionHeader;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
        [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
        [cell.textLabel setNumberOfLines:3];
    }
    switch (indexPath.section) {
        case 0: 
            switch (indexPath.row) {
                case 0:
                    cell.textLabel.text = @"Black Wattle Mt Benson Merlot 2008";
                    cell.detailTextLabel.text = @"Mt Benson, South Australia.";
                    break;
                case 1:
                    cell.textLabel.text = @"Two Hands Canny Butcher Barossa Valley Shiraz Grenache Mataro 2009";
                    cell.detailTextLabel.text = @"Barossa Valley, South Australia.";
                    break;
            }
            break;
        case 1: 
            switch (indexPath.row) {
                case 0:
                    cell.textLabel.text = @"Amberton Lizard Sauvignon Blanc Semillon 2011";
                    cell.detailTextLabel.text = @"South Eastern Australia.";
                    break;
                case 1:
                    cell.textLabel.text = @"Vasse Felix Margaret River Chardonnay Margaret River";
                    cell.detailTextLabel.text = @"Western Australia.";
                break;          }
            break;
        case 2: 
            switch (indexPath.row) {
                case 0:
                    cell.textLabel.text = @"Janisson Fils Brut Non Vintage Champagne";
                    cell.detailTextLabel.text = @"Champagne, France.";
                    break;
                case 3:
                    cell.textLabel.text = @"Francois Montand Brut Blanc De Blancs NV";
                    cell.detailTextLabel.text = @"Premium French sparkling vineyard areas.";
                    break;
            }
            break;
    }
    return cell;
}

-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    DetailViewController *ViewController = [[DetailViewController alloc] init];

    ViewController.Wine = [indexPath section];

    [self.navigationController pushViewController:ViewController animated:YES];
}

DetailView：

- (void)viewDidLoad{    
[super viewDidLoad];
switch (Wine) {
    case 0: 
        switch (Wine) {
            case 0:
                self.navigationItem.title = @"Black Wattle Mt Benson Merlot 2008";
                WineTextView.text = @"Alcohol: 14.5%\n"
                "\n"
                "Foods: Pan grilled fillet mignon with buttered mushrooms and silky mashed potatoes.\n";
                break;
            case 1:
                self.navigationItem.title = @"Two Hands Canny Butcher Barossa Valley Shiraz Grenache Mataro 2009";
                WineTextView.text =  @"Alcohol: 14.2%\n"
                "\n"
                "Foods: Enjoy with beef stew and winter vegetables.\n";
                break;

            default:
                break;
        }
        break;

    case 1: 
        switch (Wine) {
            case 0:
                self.navigationItem.title = @"Amberton Lizard Sauvignon Blanc Semillon 2011";
                WineTextView.text = @"Alcohol: 14.5%\n"
                "\n"
                "Foods: Pan grilled fillet mignon with buttered mushrooms and silky mashed potatoes.\n";
                break;
            case 1:
                self.navigationItem.title = @"Vasse Felix Margaret River Chardonnay Margaret River";
                WineTextView.text = @"Alcohol: 12%\n"
                "\n"
                "Foods: Enjoy with Chinese roast duck salad.\n";
                break;
            default:
                break;
        }
        break;

    case 2: 
        switch (Wine) {
            case 0:
                self.navigationItem.title = @"Janisson Fils Brut Non Vintage Champagne";
                WineTextView.text = @"Alcohol: 12%\n"
                "\n"
                "Foods: Ideal aperitif style, to accompany canapés and hors doeuvres.\n";
                break;
            case 1:
                self.navigationItem.title = @"Francois Montand Brut Blanc De Blancs NV";
                WineTextView.text = @"Alcohol: 12%\n"
                "\n"
                "Foods: Apéritif, fish, and creamy dishes..\n";
                break;
            default:
                break;
        }
    default:
        break;
}

Answer 1

至少DetailView中的代码有两个嵌套的switch语句，可以打开同一个变量Wine。例如，这导致“双手Canny Butcher Barossa Valley”无法到达，因为Wine不能同时为零和一个。也许您打算使用两个变量并存储部分和行，以便在DetailView中使用。

无论如何，我建议删除数据重复并将所有内容存储在一个地方。例如，如果您将所有葡萄酒信息存储在NSArray中，则可以使用此数组来检索数据，而无需使用大型case语句。这也允许将固定列表交换为从本地数据库甚至网络中检索的内容。

例如，如果您创建了自己的类WineInformation，其中包含葡萄酒各个方面的属性（名称，酒精含量，推荐食物），您可以简单地传递所选的WineInformation对象行DetailView行，然后显示详细信息。这样您就不必处理索引路径或DetailView中的任何内容，只需集中精力展示葡萄酒。

TableView ---＆gt;详细视图

1 个答案: