objective-c - 如何向 UITableView 显示空值？如果在 iphone sdk 中的 web 服务响应中找不到标签

Question

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
{
    if( [elementName isEqualToString:@"PublicBusinessName"])
    {
    boolListofareasdata=YES;
    }
    else if( [elementName isEqualToString:@"ProfessionName"])
    {
        boolListofareasdata1=YES;
    }
    else if( [elementName isEqualToString:@"PublicContactEmail"])
    {
        boolListofareasdata2=YES;
    }
    else if( [elementName isEqualToString:@"PublicBusinessURL"])
    {
        boolListofareasdata3=YES;
    }
    else if( [elementName isEqualToString:@"BrandLogoName"])
    {
        boolListofareasdata4=YES;
    }
}


- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    if (boolListofareasdata)
    {
        [arrareasdata addObject:string];

        NSLog(@"NAME...............%@",arrareasdata);
    }
    else if (boolListofareasdata1)
    {
        [arrareasdata1 addObject:string];

        NSLog(@"DESIGN..............%@",arrareasdata1);
    }
    else if (boolListofareasdata2)
    {
        [arrareasdata2 addObject:string];

        NSLog(@"DESIGN..............%@",arrareasdata1);
    }
    else if (boolListofareasdata3)
    {
        [arrareasdata3 addObject:string];

        NSLog(@"WEB....................%@",arrareasdata3);
    }
    else if (boolListofareasdata4)
    {
        [arrareasdata4 addObject:str];

        NSLog(@"WEB....................%@",arrareasdata4);
    }
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:   (NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if ([elementName isEqualToString:@"PublicBusinessName"])
    {
        boolListofareasdata=NO; 
    }
    else if ([elementName isEqualToString:@"ProfessionName"])
    {
        boolListofareasdata1=NO; 
    }
    else if( [elementName isEqualToString:@"PublicContactEmail"])
    {
        boolListofareasdata2=NO;
    }
    else if ([elementName isEqualToString:@"PublicBusinessURL"])
    {
        boolListofareasdata3=NO; 
    }
    else if ([elementName isEqualToString:@"BrandLogoName"])
    {
        boolListofareasdata4=NO; 
    }
}

- (void)parserDidEndDocument:(NSXMLParser *)parser{
    [tableView reloadData];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{   
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [arrareasdata3 count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath  *)indexPath
{

    static NSString *CellIdentifier = @"CustomCell";

    CustomCell *cell = (CustomCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {        
        NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:self options:nil];

        for (id currentObject in topLevelObjects)
        {
            if ([currentObject isKindOfClass:[UITableViewCell class]])
            {
                cell =  (CustomCell *) currentObject;
                break;
            }
        }
    }

    NSLog(@"TABLE VIEW CONTROLLER........................");
    cell.nameLabel.text = [arrareasdata objectAtIndex:indexPath.row];
    cell.designLabel.text = [arrareasdata1 objectAtIndex:indexPath.row];
    cell.emailLabel.text = [arrareasdata2 objectAtIndex:indexPath.row];
    cell.webLabel.text = [arrareasdata3 objectAtIndex:indexPath.row];

    return cell;
}

Answer 1

在 uitableviewcell 中添加空值，如下所示：

 NSString *strName = [arrareasdata objectAtIndex:indexPath.row];
 if((strName.length > 0)  
 {
   cell.nameLabel.text = strName;
 }
 else
 {
    cell.nameLabel.text = @"";
 }
 //same logic for designLabel,emailLabel,webLabel in which u will fill your data