Question

所以我一直试图从前天开始解决这个问题，但没有运气。我有一个有九个单元格的UITableView，问题是当我的表格视图显示时，它只显示前6个单元格的数据，这些数据在屏幕上可见，经过一些阅读后我知道我应该重新加载该部分而不是只是[tableview reload]，因为它只重新加载屏幕上可见的单元格，我尝试过，但它没有解决问题。这就是我的UITableView的样子：

滚动后，

如果我快速向上滚动，第一个单元格变空，即没有开始和结束日期，但现在最后一个单元格有开始和结束日期。

最后一个单元格现在有开始日期和结束日期。

此外，如果我滚动到最后，然后单击取消并再次使此视图显示所有单元格具有开始和结束值。我不知道为什么会这样。任何帮助将不胜感激。我的cellForRowAtIndexPath如下：

- (UITableViewCell *)tableView:(UITableView *)tableView1  cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *Cell;

if(indexPath.section == 1)
{
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"StageCloseCell" owner:self options:nil];
    if(indexPath.row == 0)
    {
        Cell = [tableView1 dequeueReusableCellWithIdentifier:@"CloseCell"];

        if (readOnly || [dealStagesFeature isEqualToString:@"VIEW"])
        {
            [closedNoDecisionBtn setHidden:YES];
            [closedLostBtn setHidden:YES];
            [closedWonBtn setHidden:YES];
        }

        if ([dealSelected.stage isEqualToString:@"Closed Won"] ||
            [dealSelected.stage isEqualToString:@"Closed Lost"] ||
            [dealSelected.stage isEqualToString:@"Closed-NoDecision"])
        {
            [closedNoDecisionBtn setHidden:YES];
            [closedLostBtn setHidden:YES];
            [closedWonBtn setHidden:YES];
        }

        if (Cell == nil)
        {
            Cell = (UITableViewCell *)[nib objectAtIndex:0];
            closeDateTxtFld.text = [formatterForDisplay stringFromDate:dealCloseDt];
            //[self enableCloseButtons];
            if([dealSelected.import_source_type isEqualToString:@"SALESFORCE"])
                [closedNoDecisionBtn setHidden:YES];
            [closeLbl setHidden:YES];
        }
    }
 return Cell;
}

StageCell *cell = (StageCell*)[tableView1 dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [[StageCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}

if(indexPath.row == 9)
    [cell.contentView addSubview:cell.mClosedSegCtrl];

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

A2OTemplateStage *stage = [stages objectAtIndex:[indexPath row]];

NSLog(@"Deal Stage  = %@",stage);

[[cell mStageNameLbl] setText:[NSString stringWithFormat:@"%@",stage.stage_name]];

[[cell mStartDateTextField] setTag:START_DATE_TEXTFIELD_CELL_TAG*([indexPath row]+1)];
[cell mStartDateTextField].delegate = self;
[[cell mEndDateTextField] setTag:END_DATE_TEXTFIELD_CELL_TAG*([indexPath row]+1)];
[cell mEndDateTextField].delegate = self;
[[cell mSatusLbl] setTag:COMPLETE_BTN_TAG*([indexPath row]+1)];
[[cell mCompleteBtn] setTag:COMPLETE_BTN_TAG*([indexPath row]+1)];
[[cell mCompleteBtn] addTarget:self action:@selector(satgeComplete:) forControlEvents:UIControlEventTouchUpInside];
[[cell mSkipBtn] setTag:SKIP_BTN_TAG*([indexPath row]+1)];
[[cell mSkipBtn] addTarget:self action:@selector(stageSkip:) forControlEvents:UIControlEventTouchUpInside];

cell.selectionStyle=UITableViewCellSelectionStyleNone;
//cell.accessoryType=UITableViewCellAccessoryCheckmark;

return cell;
}

**编辑**

-(void) reloadControls :(BOOL) disableAll
{
// int noOfStages = validStageCount;
if(!mStagesArr || [mStagesArr count]==0 || [mStagesArr count] < validStageCount)
    return;

for(int i=0; i<validStageCount; i++)
{
    StageData *stageData = mStagesArr[i];
    StageCell *cell = (StageCell*)[self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]];
    UITextField *startField = [cell mStartDateTextField];
    UITextField *endField = [cell mEndDateTextField];

    [startField setBackgroundColor:[UIColor whiteColor]];
    [endField setBackgroundColor:[UIColor whiteColor]];
    [startField setTextColor:[UIColor blackColor]];
    [endField setTextColor:[UIColor blackColor]];

    if(stageData.state == stageSkip)
    {
        cell.accessoryType = UITableViewCellAccessoryNone;
        [cell.mCompleteBtn setHidden:YES];
        [cell.mSkipBtn setHidden:YES];
        [cell.mSatusLbl setHidden:NO];
        [cell.mSatusLbl setText:@"Skipped"];
        [startField setText:@""];
        [startField setBackgroundColor:[UIColor whiteColor]];
//      [startField setPlaceholder:@"Start Date"];
        [startField setPlaceholder:[formatterForDisplay stringFromDate:stageData.startDate]];
//          [endField setPlaceholder:@"End Date"];
        [endField setText:@""];
        [endField setBackgroundColor:[UIColor whiteColor]];
        continue;
    }
    if(stageData.state == stageInProgress)
    {
        if(readOnly)
        {
            [cell.mSatusLbl setHidden:NO];
            [cell.mSatusLbl setText:@"In Progress"];
            [cell.mCompleteBtn setHidden:YES];
            [cell.mSkipBtn setHidden:YES];
        }
        else
        {
            [cell.mCompleteBtn setHidden:NO];
            [cell.mSkipBtn setHidden:NO];

            if([stageData.startDate compare:[NSDate date]] == NSOrderedDescending)
                [cell.mCompleteBtn setEnabled:NO];
            [cell.mSatusLbl setHidden:YES];
        }
    }
    if(stageData.state == stageComplete)
    {
        [cell.mCompleteBtn setHidden:YES];
        [cell.mSkipBtn setHidden:YES];
        [cell.mSatusLbl setHidden:NO];
        //[cell bringSubviewToFront:cell.mSatusLbl];
        [cell.mSatusLbl setText:@"Completed"];
        [startField setBackgroundColor:[UIColor colorWithRed:220/255.0f green:220/255.0f blue:220/255.0f alpha:1.0]];
        [endField setBackgroundColor:[UIColor colorWithRed:220/255.0f green:220/255.0f blue:220/255.0f alpha:1.0]];
        [startField setTextColor:[UIColor blackColor]];
        [endField setTextColor:[UIColor blackColor]];
    }
    if(stageData.state == stageFuture)
    {
        [cell.mCompleteBtn setHidden:YES];
        [cell.mSkipBtn setHidden:YES];
        [cell.mSatusLbl setHidden:YES];
    }
    [startField setPlaceholder:[formatterForDisplay stringFromDate:stageData.startDate]];
    [startField setBackgroundColor:[UIColor colorWithRed:220/255.0f green:220/255.0f blue:220/255.0f alpha:1.0]];
    if(stageData.state == stageComplete)
    {
        [endField setText:@""];
        [endField setPlaceholder:[formatterForDisplay stringFromDate:stageData.endDate]];
    }
    else
    {
        [endField setText:[formatterForDisplay stringFromDate:stageData.endDate]];
        [endField setPlaceholder:@""];
    }
    if(readOnly)
    {
        [cell.mCompleteBtn setHidden:YES];
        [cell.mSkipBtn setHidden:YES];
        [startField setEnabled:NO];
        [startField setTextColor:[UIColor blackColor]];
        [endField setEnabled:NO];
        [endField setTextColor:[UIColor blackColor]];
        [closedLostBtn setHidden:YES];
        [closedWonBtn setHidden:YES];
        [closedNoDecisionBtn setHidden:YES];
        [closeLbl setHidden:NO];
        [closeLbl setText:[self dealCloseStatus]];
        [closeDateTxtFld setTextColor:[UIColor grayColor]];
        [closeDateTxtFld setEnabled:NO];
    }
    if(disableAll)
    {
        [cell.mCompleteBtn setEnabled:NO];
        [cell.mSkipBtn setEnabled:NO];
        [cell.mSatusLbl setEnabled:NO];
        [startField setEnabled:NO];
        [endField setEnabled:NO];
        [closeDateTxtFld setEnabled:NO];
//      [closeDateTxtFld setTextColor:[UIColor grayColor]];
        [closeDateTxtFld setTextColor:[UIColor blackColor]];
        [closedLostBtn setEnabled:NO];
        [closedWonBtn setEnabled:NO];
        [closedNoDecisionBtn setEnabled:NO];

        continue;
    }

    if ([dealStagesFeature isEqualToString:@"VIEW"])
    {
        [cell.mCompleteBtn setHidden:YES];
        [cell.mSkipBtn setHidden:YES];
        [startField setEnabled:NO];
        [startField setTextColor:[UIColor blackColor]];
        [endField setEnabled:NO];
        [endField setTextColor:[UIColor blackColor]];
        [closedLostBtn setHidden:YES];
        [closedWonBtn setHidden:YES];
        [closedNoDecisionBtn setHidden:YES];
        [closeLbl setHidden:YES];
        [closeDateTxtFld setTextColor:[UIColor grayColor]];
        [closeDateTxtFld setEnabled:NO];
    }
}

closeDateTxtFld.text = [formatterForDisplay stringFromDate:dealCloseDt];
//[self enableCloseButtons];
}

编辑（答案） 通过调用reloadControls中的方法cellForRowAtIndexPath解决了该问题。谢谢ThXou。

Answer 1

我认为重点是，每次向下或向上滚动时，tableView都会重新加载并重新使用单元格。因此，您应该在cellForRowAtIndexPath:中为第0部分启用/禁用，隐藏/取消隐藏UI组件，以便告知重用的单元格必须显示哪些视图。就像你在第1部分中所做的那样。

但是，子类化UITableViewCell并在子类中实现这种行为，我认为这是一种最佳实践，可以帮助您更好地组织代码。

UITableView无法正确显示数据

1 个答案: