Iphone：UITableView标题行在6行后重复

Question

我正在开发一款通用应用。 在这个应用程序中有一个UITableView。 问题是TableView中的标题行在iphone中的6行和iPad中的9行之后重复。

我用谷歌搜索但没有找到解决这个标题问题的解决方案。 请帮忙。

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    // Return the number of rows in the section.

    return [tripList count];
}

UiTableview cellForRowAtIndexPath代码：

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

    static NSString *CellIdentifier = @"Cell";

    UILabel *lblTripNumber = nil;
    UILabel *lblTripState = nil;
    UIImageView *imgTripState = nil;
    UILabel *lblStateTitleText = nil;
    UILabel *lblTripNUmberTitleValue = nil;

    static NSUInteger const kTripNumberLabelTag = 2;
    static NSUInteger const kTripStateLabelTag = 3;
    static NSUInteger const kTripImageTag = 4;


    BOOL isiPhone = UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone;
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if(indexPath.row == 0)
    {
        if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

            if (!isiPhone) // 1=Ipad        
            {
                lblStateTitleText = [[[UILabel alloc] initWithFrame:CGRectMake(205, 27, 250, (cell.contentView.frame.size.height))] autorelease];
                lblStateTitleText.font = [UIFont boldSystemFontOfSize:32];
            }
            else
            {
                lblStateTitleText = [[[UILabel alloc] initWithFrame:CGRectMake(65, 10, 130, (cell.contentView.frame.size.height))] autorelease];
                lblStateTitleText.font = [UIFont boldSystemFontOfSize:16];
            }
            lblStateTitleText.textAlignment = UITextAlignmentLeft;
            lblStateTitleText.backgroundColor = [UIColor clearColor];
            lblStateTitleText.tag = 11;     
            lblStateTitleText.text = @"Trip State"; 
            lblStateTitleText.textColor = [UIColor cyanColor];
            [cell.contentView addSubview:lblStateTitleText];

            if (!isiPhone) // 1=Ipad        
            {
                lblTripNUmberTitleValue = [[[UILabel alloc] initWithFrame:CGRectMake(445, 27, 290, (cell.contentView.frame.size.height))] autorelease];
                lblTripNUmberTitleValue.font = [UIFont boldSystemFontOfSize:32];
            }
            else
            {
                lblTripNUmberTitleValue = [[[UILabel alloc] initWithFrame:CGRectMake(180, 10, 250, (cell.contentView.frame.size.height))] autorelease];
                lblTripNUmberTitleValue.font = [UIFont boldSystemFontOfSize:16];
            }
            lblTripNUmberTitleValue.textAlignment = UITextAlignmentLeft;
            lblTripNUmberTitleValue.backgroundColor = [UIColor clearColor];
            lblTripNUmberTitleValue.tag = 12;       
            lblTripNUmberTitleValue.text = @"Confirmation#";    
            lblTripNUmberTitleValue.textColor = [UIColor greenColor];
            [cell.contentView addSubview:lblTripNUmberTitleValue];  

        }

    }
    else 
    {   
        if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

            CGFloat xIndex = 6.0;       
            CGFloat xIpadIndex = 6.0;

            CGFloat TripNumberLabelWidth = 130.0;

            if (!isiPhone) // 1=Ipad        
            {
                imgTripState = [[[UIImageView alloc] initWithFrame:CGRectMake(xIndex, 18, 50, 64)] autorelease];
            }
            else
            {
                imgTripState = [[[UIImageView alloc] initWithFrame:CGRectMake(xIndex, 8, 32, 32)] autorelease];
            }

            imgTripState.tag = kTripImageTag;
            [cell.contentView addSubview:imgTripState];

            xIndex +=73;
            xIpadIndex +=85;

            if (!isiPhone) // 1=Ipad        
            {
                lblTripState = [[[UILabel alloc] initWithFrame:CGRectMake(xIpadIndex, 25, TripNumberLabelWidth, (cell.contentView.frame.size.height))] autorelease];
                lblTripState.font = [UIFont boldSystemFontOfSize:38];
            }
            else
            {
                lblTripState = [[[UILabel alloc] initWithFrame:CGRectMake(xIndex, 1, TripNumberLabelWidth, (cell.contentView.frame.size.height))] autorelease];
                lblTripState.font = [UIFont boldSystemFontOfSize:20];
            }
            lblTripState.textAlignment = UITextAlignmentLeft;
            lblTripState.backgroundColor = [UIColor clearColor];
            lblTripState.tag = kTripStateLabelTag;      
            lblTripState.textColor = [UIColor colorWithRed:(0.0/255) green:(241.0/255) blue:(216.0/255) alpha:1.0f];
            [cell.contentView addSubview:lblTripState];

            xIndex +=132;
            xIpadIndex +=120;

            if (!isiPhone) // 1=Ipad
            {
                lblTripNumber = [[[UILabel alloc] initWithFrame:CGRectMake(xIpadIndex, 25, TripNumberLabelWidth, (cell.contentView.frame.size.height))] autorelease];
                lblTripNumber.font = [UIFont boldSystemFontOfSize:35];
            }
            else
            {
                lblTripNumber = [[[UILabel alloc] initWithFrame:CGRectMake(xIndex, 0, TripNumberLabelWidth, (cell.contentView.frame.size.height))] autorelease];
                lblTripNumber.font = [UIFont boldSystemFontOfSize:18];
            }

            lblTripNumber.textAlignment = UITextAlignmentLeft;
            lblTripNumber.backgroundColor = [UIColor clearColor];
            lblTripNumber.tag = kTripNumberLabelTag;        
            lblTripNumber.textColor = [UIColor greenColor];
            [cell.contentView addSubview:lblTripNumber];

        }else
        {
            // A reusable cell was available, so we just need to get a reference to the subviews using their tags.
            lblTripNumber = (UILabel *)[cell.contentView viewWithTag:kTripNumberLabelTag];
            lblTripState = (UILabel *)[cell.contentView viewWithTag:kTripStateLabelTag];
        //  imgTripState = (UILabel *)[cell.contentView viewWithTag:kTripImageTag];
        }

        lblTripNumber.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
        lblTripState.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;


        int indCount = indexPath.row -1;
        TripDetails *trip = [tripList objectAtIndex:indCount];
        lblTripNumber.text = trip.tripNumber;
        lblTripState.text = trip.tripState;


    // Configure the cell...

    return cell;
}

Answer 1

您的TableData中可能只有6个项目。

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

   return [TableData count];

}

在你的情况下，'TableData'是'tripList'。

Answer 2

我知道了，我删除了

if (cell == nil) 

它工作得很好。 实际上它在第一个标题行中寻找它的标签并且无法替换它的值，因此产生了问题。

Answer 3

检查你的viewFor标题部分。 如果您使用数组作为标题视图，则此数组对象未正确分配内存。 它使用最后一个对象来解决所有问题，并替换旧的。 在向其添加对象之前，为数组创建内存分配对象。 告诉我这是否是解决方案

Answer 4

您的代码尝试重用单元格，但您编码的方式是错误的。 请参阅我的答案，了解适当的模式。 在坚果壳中，您应该只在if (cell == nil)部分中定义共享单元属性，行特定属性（如标签文本等）应在此部分之外定义。 对于索引为0的行，情况并非如此。