在iPhone中动态更改UITableviewCell高度？ [英] Change UITableviewCell height dynamically in iPhone?

问题描述

我在UITableViewCell中有三个定制的UILabel。这样的单元格设计

 日期（12.1.2012）时间（12.00pm）
费用：$ 20.00 
详细信息
  

我已经在 - （CGFloat）中指定了行高度100 tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath; 。但是，现在的细节有些时候从服务器返回空（Null）。那时候，我需要从单元格中删除详细信息标签，并将特定的单元格（行）高度更改为70.我该怎么做？我在Google中最好地搜索了我的水平。但是，我还是很困惑地做到这一点。你能帮我么？谢谢。我从这个链接中得到了一些想法 - http://www.cimgf.com/2009/09/23/uitableviewcell-dynamic-height/ 。他们只使用一个标签来调整行高。请帮助我。

   - （CGFloat）tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 return 90; 
} 
 
  - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath :( NSIndexPath *）indexPath 
 {
 static NSString * CellIdentifier = @Cell ; 
 
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：CellIdentifier]; 
 if（cell == nil）
 {
 cell = [[[UITableViewCell alloc] initWithStyle：UITableViewCellStyleDefault reuseIdentifier：CellIdentifier] autorelease]; 
 
 
 UILabel * dateLabel = [[UILabel alloc] initWithFrame：CGRectMake（10，0，100，30）]; 
 dateLabel.tag = 100; 
 dateLabel.backgroundColor = [UIColor clearColor]; 
 dateLabel.font = [UIFont fontWithName：@Helveticasize：16]; 
 dateLabel.font = [UIFont boldSystemFontOfSize：16]; 
 dateLabel.highlightedTextColor = [UIColor whiteColor]; 
 [cell.contentView addSubview：dateLabel]; 
 
 UILabel * timeLabel = [[UILabel alloc] initWithFrame：CGRectMake（120，0，200，25）]; 
 timeLabel.tag = 101; 
 timeLabel.backgroundColor = [UIColor clearColor]; 
 timeLabel.font = [UIFont fontWithName：@Helveticasize：14]; 
 timeLabel.highlightedTextColor = [UIColor whiteColor]; 
 [cell.contentView addSubview：timeLabel]; 
 
 UILabel * costLabel = [[UILabel alloc] initWithFrame：CGRectMake（10，30，300，25）]; 
 costLabel.tag = 102; 
 costLabel.backgroundColor = [UIColor clearColor]; 
 costLabel.font = [UIFont fontWithName：@Helveticasize：14]; 
 costLabel.font = [UIFont boldSystemFontOfSize：14]; 
 costLabel.highlightedTextColor = [UIColor whiteColor]; 
 [cell.contentView addSubview：costLabel]; 
 
 UILabel * eventLabel = [[UILabel alloc] initWithFrame：CGRectMake（10，60，300，25）]; 
 eventLabel.tag = 103; 
 eventLabel.backgroundColor = [UIColor clearColor]; 
 eventLabel.font = [UIFont fontWithName：@Helveticasize：14]; 
 eventLabel.font = [UIFont boldSystemFontOfSize：14]; 
 eventLabel.highlightedTextColor = [UIColor whiteColor]; 
 [cell.contentView addSubview：eventLabel]; 
} 
 
 UILabel * dateLabel =（UILabel *）[cell.contentView viewWithTag：100]; 
 dateLabel.text = [DateArray objectAtIndex：indexPath.row]; 
 
 UILabel * timeLabel =（UILabel *）[cell.contentView viewWithTag：101]; 
 timeLabel.text = [timeArray objectAtIndex：indexPath.row]; 
 
 UILabel * costLabel =（UILabel *）[cell.contentView viewWithTag：102]; 
 costLabel.text = [costArray objectAtIndex：indexPath.row]; 
 
 UILabel * eventLabel =（UILabel *）[cell.contentView viewWithTag：103]; 
 NSString * description = [eventArray objectAtIndex：indexPath.row]; 
 if（[description isEqualToString：@]）
 {
 eventLabel.text = @; //这里我不想显示此标签并将行高调整为（60）; 
} 
 else 
 {
 eventLabel.text = description; 
} 
返回单元格; 
} 
  

我该怎么做？谢谢。

解决方案

在返回高度时，检查详细信息描述是否为空。如果它是返回60。

   - （CGFloat）tableView：（UITableView *）tableView heightForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 NSString * description = [eventArray objectAtIndex：indexPath.row]; 
 if（[description isEqualToString：@]）
 return 60 
 else 
 {
 return 90; 
} 
} 
  

此外，您需要删除 @Details在 cellForRowAtIndexPath中的相同if语句中：。事先标记它，从子视图中识别它，并将其从单元格中删除。

I have three custom UILabel in UITableViewCell. The cell design like this,

Date(12.1.2012)  Time(12.00pm)
Cost: $20.00
Details

I have specified the row height 100 in - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;. But, now the details some times return empty(Null) from the server. On that time i need to remove the Details label from the cell and change the particular cell(row) height to 70. How can i do this? I searched my level best in Google. But, i still just confused to do this. Can you please help me? Thanks. I got some idea from this link - http://www.cimgf.com/2009/09/23/uitableviewcell-dynamic-height/. They used only one label to resize the row height. Please help me.

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{ 
  return 90;
}

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

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) 
        {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];


            UILabel *dateLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 100, 30)];
            dateLabel.tag = 100;
            dateLabel.backgroundColor = [UIColor clearColor];
            dateLabel.font = [UIFont fontWithName:@"Helvetica" size:16];
            dateLabel.font = [UIFont boldSystemFontOfSize:16];
            dateLabel.highlightedTextColor = [UIColor whiteColor];
            [cell.contentView addSubview: dateLabel]; 

            UILabel *timeLabel = [[UILabel alloc] initWithFrame:CGRectMake(120, 0, 200, 25)];
            timeLabel.tag = 101;
            timeLabel.backgroundColor = [UIColor clearColor];
            timeLabel.font = [UIFont fontWithName:@"Helvetica" size:14];
            timeLabel.highlightedTextColor = [UIColor whiteColor];
            [cell.contentView addSubview: timeLabel]; 

            UILabel *costLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 25)];
            costLabel.tag = 102;
            costLabel.backgroundColor = [UIColor clearColor];
            costLabel.font = [UIFont fontWithName:@"Helvetica" size:14];
            costLabel.font = [UIFont boldSystemFontOfSize:14];
            costLabel.highlightedTextColor = [UIColor whiteColor];
            [cell.contentView addSubview: costLabel];

            UILabel *eventLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 60, 300, 25)];
            eventLabel.tag = 103;
            eventLabel.backgroundColor = [UIColor clearColor];
            eventLabel.font = [UIFont fontWithName:@"Helvetica" size:14];
            eventLabel.font = [UIFont boldSystemFontOfSize:14];
            eventLabel.highlightedTextColor = [UIColor whiteColor];
            [cell.contentView addSubview: eventLabel];
         }

        UILabel *dateLabel = (UILabel *) [cell.contentView viewWithTag:100];
        dateLabel.text = [DateArray objectAtIndex:indexPath.row];

        UILabel * timeLabel = (UILabel *) [cell.contentView viewWithTag:101];
        timeLabel.text = [timeArray objectAtIndex:indexPath.row];

        UILabel * costLabel = (UILabel *) [cell.contentView viewWithTag:102];
        costLabel.text = [costArray objectAtIndex:indexPath.row];

        UILabel *eventLabel = (UILabel *) [cell.contentView viewWithTag:103];
        NSString *description = [eventArray objectAtIndex:indexPath.row];
        if([description isEqualToString:@""])
       {
         eventLabel.text = @""; // Here i don't want to show this label and resize(reduce) the row height to 60;
       }
       else
       {
         eventLabel.text = description;
       }
        return cell;
    }

How can i do this? Thanks.

解决方案

While returning the height,check if the detail description is empty. If it is return 60.

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{ 
NSString *description = [eventArray objectAtIndex:indexPath.row];
if([description isEqualToString:@""])
    return 60
else
{
    return 90;
}
}

Also, you need to remove the label with @"Details" in the same if statement in cellForRowAtIndexPath:. Tag it beforehand, identify it from the subviews and remove it from the cell.

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