2011-09-04 75 views
2

用自定义单元格加载tableview后,所有看起来很好,向下滚动都很好。 当我向上滚动上面的单元格显示空白。它们实际上功能完备,因为它们仍然可以被选中,然后进入细节页面。 代码cellForRowAtIndexPath为返回的行执行,并返回单元格,正如我所期望的正确的细节。它只是不显示。 任何想法/帮助,将不胜感激。当再次滚动tableview时,单元格显示为空白?

下面的代码是我一直在使用的。

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


    static NSString *CustomCellIdentifier = @"CustomCellIdentifier"; 

    CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CustomCellIdentifier]; 
    if (cell == nil) { 

     NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:self options:nil]; 
     for (id oneObject in nib) { 
      if ([oneObject isKindOfClass:[CustomCell class]]) { 
       cell = (CustomCell *)oneObject; 
      } 
     } 
    } 

    // Configure the cell. 


    Book *aBook = [appDelegate.sortedArray objectAtIndex:indexPath.row]; 


    //name 
    NSString *trimmedString = [aBook.Name stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 
    cell.nameLabel.text = trimmedString; 
    //catagory 
    NSString *trimmedExperience = [aBook.PrimaryExperience stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; 

    if ([trimmedExperience isEqualToString:@"1"]) { 
     cell.catagoryLabel.text = @"None"; 
    } 
    else if([trimmedExperience isEqualToString:@"2"]){ 
     cell.catagoryLabel.text = @"Limited"; 
    } 
    else if ([trimmedExperience isEqualToString:@"4"]) { 
     cell.catagoryLabel.text = @"Full"; 

    } 
    else { 
     cell.catagoryLabel.text = @""; 

    } 




    cell.distanceLabel.text = [NSString stringWithFormat:@"%1.1f",aBook.distance]; 


    cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton; 


    return cell; 
} 
+0

您究竟如何渲染细胞?您是使用Interface Builder还是从头开始? – medopal

+0

单元格从界面生成器中呈现,文本在cellForRowAtIndexPath中设置 - 奇怪的是,它们工作得很漂亮,直到他们滚出顶部。 – Davida

+1

你可以显示cellForRowAtIndexPath方法吗? – jrturton

回答

1

问题在于xib文件及其如何加载。为了解决问题并获得完全控制,以下代码替代了定制单元的IB版本。

static NSString *CellTableIdentifier = @"CellTableIdentifier"; 
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellTableIdentifier]; 
if (cell == nil) { 
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellTableIdentifier] autorelease]; 
    CGRect nameLabelRect = CGRectMake(15, 5, 200, 15); 
    UILabel *nameLabel = [[UILabel alloc] initWithFrame:nameLabelRect]; 
    nameLabel.textAlignment = UITextAlignmentLeft; 
    nameLabel.font = [UIFont boldSystemFontOfSize:14]; 
    nameLabel.tag = kNameTag; 
    [cell.contentView addSubview:nameLabel]; 
    [nameLabel release]; 

    CGRect catagoryLabelRect = CGRectMake(15, 26, 100, 15); 
    UILabel *catagoryLabel = [[UILabel alloc]initWithFrame:catagoryLabelRect]; 
    catagoryLabel.textAlignment = UITextAlignmentLeft; 
    catagoryLabel.font = [UIFont systemFontOfSize:12]; 
    catagoryLabel.tag = kExperienceTag; 
    [cell.contentView addSubview:catagoryLabel]; 
    [catagoryLabel release]; 

    CGRect distanceLabelRect = CGRectMake(210, 26, 70, 15); 
    UILabel *distanceLabel = [[UILabel alloc] initWithFrame:distanceLabelRect]; 
    distanceLabel.textAlignment = UITextAlignmentRight; 
    distanceLabel.font = [UIFont boldSystemFontOfSize:12]; 
    distanceLabel.tag = kDistanceTag; 
    [cell.contentView addSubview:distanceLabel]; 
    [distanceLabel release]; 
} 

感谢您帮助我们思考这一点。现在滚动效果很好。

+0

很高兴你得到它的工作......奇迹为什么xib不工作,但? – jrturton