Ios TableView--->；详细视图

我想查看

TableView

上的组织名称，并在

DetailView

上查找更多信息。但我不知道哪里出错，

DetailView

找不到我的信息。以下是

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];
}

- (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;
}

DetailView

：

- (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];
}

- (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;
}

---

至少

DetailView

中的代码有两个嵌套的switch语句，它们在同一变量

Wine

上切换。例如，这导致“双手精明的屠夫巴罗萨谷”无法到达，因为

葡萄酒

不能同时为零和一。也许您打算使用两个变量并存储节和行，以便在

DetailView

中使用

在任何情况下，我都建议删除重复数据并将所有内容存储在一个位置。例如，如果您将所有葡萄酒信息存储在

NSArray

中，则可以使用此数组检索数据，而无需使用大型case语句。这还允许将固定列表交换为从本地数据库甚至稍后从web检索的内容

---

例如，如果您创建了自己的类

WineInformation

，该类包含葡萄酒各个方面的属性（名称、酒精含量、推荐食物），您只需将所选行的

WineInformation

对象传递给

DetailView

，然后该视图将显示详细信息。通过这种方式，您不必在

DetailView

中处理索引路径或任何类似内容，只需集中显示递过来的葡萄酒。

为什么要编写两个相同的嵌套

switch

块（在viewDidLoad中）？这段代码的一半永远不会被调用。为什么会发生这种情况？看起来您有内存泄漏（您分配了

DetailViewController

，但从未

释放它）。