我的iOS应用程序中有UITableView，我想在单元格中添加一些子视图。我是通过使用
来做到的 [cell.contentView addSubview:someView];
并且效果很好，但是...当我向下滚动时，子视图开始隐藏在顶部的单元格中，当我滚动回顶部时，它们不会再出现......我在做什么错误？请问有什么解决方案吗？
修改
主要是，我正在谈论＆＃34; detailtext＆＃34;标签，但在更多情况下我有这些问题......
这是完整的代码：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell;
switch (indexPath.row) {
case 0:
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
break;
default:
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
break;
}
UIView *separatorLine = [[UIView alloc] init];
separatorLine.frame = CGRectMake(15.0f, 60 - 0.5f, cell.frame.size.width-15.0f, 0.5f);
separatorLine.tag = 4;
separatorLine.backgroundColor = [UIColor lightGrayColor];
cell.layer.masksToBounds = NO;
tableView.backgroundColor = [UIColor colorWithRed:33.0 / 255.0 green:157.0 / 255.0 blue:147.0 / 255.0 alpha:1.0];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
UIView *row2 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 200)];
UIView *profileBorder = [[UIView alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2-50, 50, 102, 102)];
profileBorder.layer.borderColor = [UIColor whiteColor].CGColor;
profileBorder.layer.borderWidth = 5; //2
profileBorder.layer.cornerRadius = 50;
NZCircularImageView *profileImage = [[NZCircularImageView alloc] initWithFrame:CGRectMake(1,1, 100, 100)];
profileImage.image = profilePhoto;
profileImage.contentMode = UIViewContentModeScaleAspectFill;
UITapGestureRecognizer *showBigProfilePhoto = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showImage:)];
profileImage.userInteractionEnabled = YES;
[profileImage addGestureRecognizer:showBigProfilePhoto];
[profileBorder addSubview:profileImage];
UILabel *numberFeelings = [[UILabel alloc] initWithFrame:CGRectMake(10, 100-25, 100, 50)];
numberFeelings.text = [NSString stringWithFormat:@"%@\nFeelings", feelings];
numberFeelings.font = [UIFont boldSystemFontOfSize:16];
numberFeelings.textAlignment = NSTextAlignmentCenter;
numberFeelings.textColor = [UIColor whiteColor];
numberFeelings.numberOfLines = 0;
UILabel *numberFriends = [[UILabel alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2+60, 100-25, 100, 50)];
numberFriends.text = [NSString stringWithFormat:@"%@\nFollowers", friends];
numberFriends.font = [UIFont boldSystemFontOfSize:16];
numberFriends.textColor = [UIColor whiteColor];
numberFriends.numberOfLines = 0;
numberFriends.textAlignment = NSTextAlignmentCenter;
[row2 addSubview:profileBorder];
[row2 addSubview:numberFriends];
[row2 addSubview:numberFeelings];
int rectButtons = cell.frame.size.width-246;
UIImageView *graph = [[UIImageView alloc] initWithFrame:CGRectMake(rectButtons/2, -20, 82, 82)];
UIImageView *badgets = [[UIImageView alloc] initWithFrame:CGRectMake(rectButtons/2+82, -20, 82, 82)];
UIImageView *photos = [[UIImageView alloc] initWithFrame:CGRectMake(rectButtons/2+164, -20, 82, 82)];
graph.image = [UIImage imageNamed:@"graph.jpg"];
badgets.image = [UIImage imageNamed:@"badgets.jpg"];
photos.image = [UIImage imageNamed:@"photos.jpg"];
graph.userInteractionEnabled = YES;
badgets.userInteractionEnabled = YES;
photos.userInteractionEnabled = YES;
UITapGestureRecognizer *graphTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showGraph:)];
[graph addGestureRecognizer:graphTap];
NSArray *jmenoCasti = [name componentsSeparatedByString:@" "];
krestni = [jmenoCasti objectAtIndex:0];
int indexOfPost = indexPath.row-3;
NSMutableAttributedString *str;
int countFeeling;
int countString;
int countBeforeFeeling;
if (indexPath.row >=3) {
str = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@ was %@", krestni, [naladyHim objectAtIndex:[[[posts objectAtIndex:indexOfPost] objectForKey:@"_feel"] integerValue]]]];
countFeeling = [[naladyHim objectAtIndex:[[[posts objectAtIndex:indexOfPost] objectForKey:@"_feel"] integerValue]] length];
countString = krestni.length+5+countFeeling;
countBeforeFeeling = countString-countFeeling+1;
int rangeStart = countBeforeFeeling-1;
int rangeStop = str.length-rangeStart;
NSLog(@"%i ... %i", countBeforeFeeling-1, countString-1);
[str addAttribute:NSFontAttributeName value: [UIFont fontWithName:@"Helvetica-Bold" size:16.0f] range:NSMakeRange(rangeStart, rangeStop)];
[str addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:32.0 / 255.0 green:147.0 / 255.0 blue:138.0 / 255.0 alpha:1.0] range:NSMakeRange(rangeStart, rangeStop)];
}
UILabel *mainText = [[UILabel alloc] initWithFrame:CGRectMake(15, 70, cell.frame.size.width-10, 20)];
mainText.attributedText = str;
UILabel *detailText;
if (!detailText) {
detailText = [[UILabel alloc] initWithFrame:CGRectMake(15, 90, cell.frame.size.width-10, 30)];
}
detailText.textColor = [UIColor grayColor];
detailText.font = [UIFont systemFontOfSize:13];
switch (indexPath.row) {
case 0:
cell.textLabel.textAlignment = NSTextAlignmentCenter;
cell.textLabel.text = name;
cell.textLabel.textColor = [UIColor whiteColor];
cell.textLabel.font = [UIFont systemFontOfSize:20];
cell.backgroundColor = [UIColor clearColor];
break;
case 1:
[cell.contentView addSubview:row2];
cell.backgroundColor = [UIColor clearColor];
break;
case 2:
cell.backgroundColor = [UIColor colorWithRed:236.0 / 255.0 green:235.0 / 255.0 blue:210.0 / 255.0 alpha:1.0];
[cell.contentView addSubview:graph];
[cell.contentView addSubview:badgets];
[cell.contentView addSubview:photos];
break;
default:
detailText.text = [[posts objectAtIndex:indexPath.row-3] objectForKey:@"_text"];
[cell.contentView addSubview:detailText];
cell.textLabel.attributedText = str;
cell.backgroundColor = [UIColor colorWithRed:236.0 / 255.0 green:235.0 / 255.0 blue:210.0 / 255.0 alpha:1.0];
break;
}
return cell; }
答案 0 :(得分：2)
这对我很有用：
for(UIView *subview in cell.contentView.subviews)
{
if([subview isKindOfClass: [UIView class]])
{
[subview removeFromSuperview];
}
}
您可以在
的开头使用它答案 1 :(得分：1)
在你的tableView：cellForRowAtIndexPath：中，当你不希望它显示时隐藏信息，但是你没有明确取消隐藏它应该显示它的单元格。
查看该方法中的前两行：你是什么 - 正确 - 做的是重用你的单元格，所以当单元格滚出视图时，它们将从UITableView中删除并放入重用队列。然后，当单元格变得可见时，TableView将从该队列中获取单元格 - 如果没有可用单元格，则创建新单元格。
这一切都很顺利，但过了一会儿，带有隐藏信息按钮的单元格会被放入队列中。然后，一段时间之后，这些单元格被重用 - 有时候对于应该有信息可见的行。
有两种解决方案：您可以显式取消隐藏您希望显示的行的信息，也可以使用两种不同类型的单元格，一种具有隐藏信息，另一种具有可见信息。然后，为每个单元格提供不同的标识符，并根据单元格所在的行，在出列/创建单元格之前设置标识符。
答案 2 :(得分：1)
您应该为每个不同的单元格创建UITableViewCell的子类，并将根据数据不会更改的所有视图相关代码添加到初始化方法中。然后在每个单元格中创建一个名为configureWithData的方法，并传入与单元格相关的数据。在此配置方法中可以创建属性字符串和修改标签帧。
它将大大减少UITableViewController中的混乱，并且设计明智得多。您的视图控制器不需要知道您的表格单元格是什么样的。
以下是我所说的一个例子：
-(void)awakeFromNib
{
if( self.accessoryType == UITableViewCellAccessoryDisclosureIndicator )
{
DTCustomColoredAccessory *accessory = [DTCustomColoredAccessory accessoryWithColor:[UIColor whiteColor]];
accessory.highlightedColor = [UIColor blackColor];
self.accessoryView = accessory;
}
}
-(void)configureCellWithObject:(id)inObject
{
TableDataModel *dataObject = (TableDataModel *)inObject;
self.titleLabel.text = dataObject.titleString;
self.subtitleLabel.text = dataObject.subtitleString;
self.accessibilityIdentifier = dataObject.accessIdString;
if( dataObject.imageUrlString != nil )
{
UIImage *iconImage = [UIImage imageNamed:dataObject.imageUrlString];
if( iconImage != nil )
{
NSInteger yOffset = [StaticTools centerYOffset:self.frame.size objectFrameSize:iconImage.size];
self.iconImageView.image = iconImage;
CGRect frame = self.iconImageView.frame;
frame.origin.y = yOffset;
frame.size = iconImage.size;
[self.iconImageView setFrame:frame];
}
else
{
[self.iconImageView loadImageFromUrl:dataObject.imageUrlString];
}
}
}