像在iPhone设置中看到的那样以编程方式向UITableView添加标签/字符串

Question

我有一个应用程序，其中几个表分开，就像在iPhone上的设置中看到的一样。我想在此标签中添加一个值，就像在设置Wi-Fi或蓝牙中看到的那样，右边有项目，左边会显示一个值。我怎么能这样做？

Setting.h

@interface Setting : NSObject {

NSString *_settingsID;
NSString *_catalogID;
NSString *_category;
NSString *_facings;
NSString *_quantity;
}

@property (nonatomic, retain) NSString *settingsID;
@property (nonatomic, retain) NSString *catalogID;
@property (nonatomic, retain) NSString *category;
@property (nonatomic, retain) NSString *facings;
@property (nonatomic, retain) NSString *quanity;

- (Setting *)initWithName:(NSString *)settingsID desc:(NSString *)category CategoryID:(NSString *)catalogID Facings:(NSString *)facings Quantity:(NSString *)quantity;

@end

Setting.m

@implementation Setting

@synthesize settingsID = _settingsID;
@synthesize catalogID = _catalogID;
@synthesize category = _category;
@synthesize facings = _facings;
@synthesize quanity = _quantity;

- (Setting *)initWithName:(NSString *)settingsID desc:(NSString *)category CategoryID:(NSString *)catalogID Facings:(NSString *)facings Quantity:(NSString *)quantity {

if ((self = [super init])) {

    self.settingsID = settingsID;
    self.catalogID = catalogID;
    self.category = category;
    self.facings = facings;
    self.quanity = quantity;
}

return self;

}

@end

接下来在我的connectionDidFinishLoading中，我将JSON调用的结果带到了我的WebAPI，并填充了这个Setting对象....

-(void) connectionDidFinishLoading:(NSURLConnection *)connection {

self.settings = [NSMutableArray array];

NSError *error = nil;

id result = [NSJSONSerialization JSONObjectWithData:receivedData options:kNilOptions error:&error];

if ([result isKindOfClass:[NSArray class]]) {

    for (NSDictionary *item in result) {

        NSString *settingsID = [item objectForKey:@"ID"];
        NSString *category = [item objectForKey:@"Category"];
        NSString *categoryID = [item objectForKey:@"CatalogID"];
        NSString *facings = [item objectForKey:@"Facings"];
        NSString *quantity = [item objectForKey:@"Quantity"];

        Setting *setting = [[Setting alloc] initWithName:settingsID desc:category CategoryID:categoryID Facings:facings Quantity:quantity];

        [self.settings addObject:setting];

    }
}

for (Setting *item in self.settings) {

    NSString *frozen = @"Frozen";
    BOOL res = [frozen isEqualToString:item.category];

    if (res == TRUE) {

        **NSLog(@"Original Value: %@, Bool Value: %@", item.facings, item.facings.boolValue == false ? @"No" : @"Yes");
        NSLog(@"Original Value: %@, Bool Value: %@", item.quantity, item.quantity.boolValue == false ? @"No" : @"Yes");
        // Frozen
        appDelegate.frozen_facing_value = item.facings.boolValue == false ? @"No" : @"Yes";
        appDelegate.frozen_quantity_value = item.quantity.boolValue == false ? @"No" : @"Yes";**
    }

    NSString *fruit = @"Fruit";
    res = [fruit isEqualToString:item.category];

    if (res == TRUE) {

        // Fruit
    }

    NSString *salads = @"Salads";
    res = [salads isEqualToString:item.category];

    if (res == TRUE) {

        // Salads
    }

    NSString *vegetables = @"Vegetables";
    res = [vegetables isEqualToString:item.category];

    if (res == TRUE) {

        // Vegetables
    }
}

NSLog(@"Finished..");
finished = TRUE;
}

我在AppDelegate.h中合成了我的selected_value，并使用它来存储用户点击的单元格的值。

@interface AppDelegate : UIResponder <UIApplicationDelegate> {    
NSString *_selected_value;
**NSString *_frozen_facing_value;**
}

@property (strong, nonatomic) UIWindow *window;

@property (strong, nonatomic) UINavigationController *navigationController;

@property (nonatomic, retain) NSString *selected_value;

**@property (nonatomic, retain) NSString *frozen_facing_value;**

@end

AppDelegate.m

这是我的cellForRowAtIndexPath

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *result = nil;

if ([tableView isEqual:self.myTableView]){

    static NSString *CellIdentifier = @"CellIdentifier";

    result = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (result == nil){
        result = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
    }

    NSMutableArray *sectionArray = [self.arrayOfSections objectAtIndex:indexPath.section];

    result.textLabel.text = [sectionArray objectAtIndex:indexPath.row];

    NSString *res = (NSString *)result.textLabel.text;

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    if ([[self tableView:tableView titleForHeaderInSection:indexPath.section] isEqualToString:@"Frozen"]) {

        if ([res isEqualToString:FACINGS]) {

           **result.detailTextLabel.text = appDelegate.frozen_facing_value;**

        } else if ([res isEqualToString:QUANTITY]) {

           result.detailTextLabel.text = @"Yes 2";
        }

    } else if ([[self tableView:tableView titleForHeaderInSection:indexPath.section] isEqualToString:@"Fruit"]) {

        if ([res isEqualToString:FACINGS]) {

            result.detailTextLabel.text = @"No 3";

        } else if ([res isEqualToString:QUANTITY]) {

            result.detailTextLabel.text = @"Yes 4";
        }

    } else if ([[self tableView:tableView titleForHeaderInSection:indexPath.section] isEqualToString:@"Salads"]) {

        if ([res isEqualToString:FACINGS]) {

            result.detailTextLabel.text = @"No 5";

        } else if ([res isEqualToString:QUANTITY]) {

            result.detailTextLabel.text = @"Yes 6";
        }

    } else if ([[self tableView:tableView titleForHeaderInSection:indexPath.section] isEqualToString:@"Vegetables"]) {

        if ([res isEqualToString:FACINGS]) {

            result.detailTextLabel.text = @"No 7";

        } else if ([res isEqualToString:QUANTITY]) {

            result.detailTextLabel.text = @"Yes 8";
        }
    }

    appDelegate.selected_value = result.detailTextLabel.text;

    result.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}

return result;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

NSMutableArray *sectionArray = [self.arrayOfSections objectAtIndex:indexPath.section];

NSLog(@"Select value: %@", appDelegate.selected_value);

appDelegate.selectedSetting = [[NSString alloc] initWithFormat:@"Select value: %@ for %@, in section: %@", @"Test", [sectionArray objectAtIndex:indexPath.row], [self tableView:tableView titleForHeaderInSection:indexPath.section]];

[tableView deselectRowAtIndexPath:indexPath animated:YES];

SettingsViewController *settings = [[SettingsViewController alloc] initWithNibName:@"Settings" bundle:[NSBundle mainBundle]];

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

在我的日志窗口中，我看到“选择值：是6”，除非我向下滚动。呈现给表的最后一个值是我最终看到的。我知道有更好的方法可以做到这一点，我只是不知道如何做到这一点。想法/建议？

Answer 1

您需要使用UITableViewCellStyleValue1样式设置表格视图单元格。这是“设置”应用中用于显示黑色标题和蓝色值的类型。

使用titleLabel为单元格设置标题，使用单元格的detailTextLabel属性设置右侧的值。

查看UITableViewCell的文档和initWithStyle：reuseIdentifier：方法。