Ios UITableView单元格重叠

我正在实现一个带有节索引的tableView。当任何特定部分中的行多于一行时，我的tableViewCells都会重叠

这是我的密码

![- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return \[self.keys count\];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
//    return \[\[\[UILocalizedIndexedCollation currentCollation\] sectionTitles\] objectAtIndex:section\];
    return \[keys objectAtIndex:section\];
}

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
//    return \[\[UILocalizedIndexedCollation currentCollation\] sectionIndexTitles\];
    return keys;

}

- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index {
    return \[\[UILocalizedIndexedCollation currentCollation\] sectionForSectionIndexTitleAtIndex:index\];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = \[tableView dequeueReusableCellWithIdentifier:nil\];
    if (cell == nil) {
        cell = \[\[UITableViewCell alloc\] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier\];

    }
    \[self.exhibitorTableView setSeparatorInset:UIEdgeInsetsMake(0, 0, 0, 0)\];

    UIView* bgview = \[\[UIView alloc\] initWithFrame:CGRectMake(0, 0, 1, 1)\];
    bgview.opaque = YES;
    bgview.backgroundColor = \[UIColor colorWithRed:244.0f/255 green:245.0f/255 blue:246.0f/255 alpha:1.0\];
    \[cell setBackgroundView:bgview\];
    cell.textLabel.font = \[UIFont fontWithName:@"Roboto-Light" size:17\];
    cell.detailTextLabel.font = \[UIFont fontWithName:@"Roboto-Light" size:13\];
    cell.textLabel.backgroundColor = \[UIColor clearColor\];
    cell.detailTextLabel.backgroundColor = \[UIColor clearColor\];
    cell.textLabel.textColor = \[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0\];

    UIImageView *defaultImage = \[\[UIImageView alloc\]init\];
    \[defaultImage setFrame:CGRectMake(5.0f, 5.0f, 40.0f, 40.0f)\];
    \[cell addSubview:defaultImage\];

    for (int i=0; i<\[self.exhibitorArray count\]; i++) {
        NSString * string = \[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"name"\];
        NSString *firstLetter = \[string substringToIndex:1\];
    if (\[\[keys objectAtIndex:indexPath.section\] isEqualToString:firstLetter\] ) {

    NSString *urlString = \[\[NSString alloc\]init\];
    urlString = @"http://";
    urlString = \[urlString stringByAppendingString:\[NSString stringWithFormat:@"%@",\[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"image"\]\]\];
    NSLog(@"%@",urlString);

    AsyncImageView *asyncImageView = \[\[AsyncImageView alloc\] initWithFrame:CGRectMake(0.0f, 0.0f, 40.0f, 40.0f)\];
    \[asyncImageView setBackgroundColor:\[UIColor clearColor\]\];
    NSString *tmp_string = \[\[NSString alloc\]init\];
    tmp_string = urlString;
    \[asyncImageView loadImageFromURL:\[NSURL URLWithString:tmp_string\]\];
    \[defaultImage addSubview:asyncImageView\];
    defaultImage.contentMode = UIViewContentModeScaleAspectFit;
    tmp_string = nil;
    asyncImageView = nil;
    defaultImage = nil;

    NSString *name_string = \[\[NSString alloc\]init\];
    name_string = \[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"name"\];
    NSLog(@"%@",name_string);
    UILabel *user_name = \[\[ UILabel alloc\]init \];
    \[user_name setFrame:(CGRectMake(58, 5, 270, 25))\];
    \[user_name setBackgroundColor: \[UIColor clearColor\]\];
    \[user_name setText:name_string\];
    \[user_name setFont:\[UIFont fontWithName:@"Roboto-Light" size:14\]\];
    \[user_name setTextAlignment:NSTextAlignmentLeft\];
    \[user_name setTextColor:\[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0\]\];
    \[cell addSubview:user_name\];
    user_name = nil;
        }
    }

    \[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator\];

    return cell;
}

！[-（NSInteger）节数表视图：（UITableView*）表视图
{
返回\[self.keys count\]；
}
-（NSString*）表格视图：（UITableView*）表格视图标题标题标题部分：（NSInteger）部分{
//返回\[\[\[UILocalizedIndexedCollation currentCollation\]sectionTitles\]对象索引：section\]；
返回\[键对象索引：节\]；
}
-（NSArray*）sectionIndexTitlesForTableView:（UITableView*）表格视图{
//返回\[\[UILocalizedIndexedCollation currentCollation\]节索引\]；
返回键；
}
-（NSInteger）tableView:（UITableView*）分区索引的tableView部分exttitle:（NSString*）标题索引：（NSInteger）索引{
返回\[\[UILocalizedIndexedCollation currentCollation\]Section for SectionIndexTextitLeatIndex:index\]；
}
-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath
{
静态NSString*CellIdentifier=@“Cell”；
UITableViewCell*单元格=\[tableView dequeueReusableCellWithIdentifier:nil\]；
如果（单元格==nil）{
cell=\[\[UITableViewCell alloc\]initWithStyle:UITableViewCellStyleSubtitle重用标识符：CellIdentifier\]；
}
\[self.exhibitorTableView setSeparatorInset:UIEdgeInsetsMake（0,0,0,0）\]；
UIView*bgview=\[\[UIView alloc\]initWithFrame:CGRectMake（0,0,1,1）\]；
bgview.opaque=是；
bgview.backgroundColor=\[UIColor color withred:244.0f/255 green:245.0f/255 blue:246.0f/255 alpha:1.0\]；
\[单元格设置背景视图：bgview\]；
cell.textlab.font=\[UIFont fontWithName:@“Roboto Light”大小：17\]；
cell.detailTextLabel.font=\[UIFont fontWithName:@“Roboto Light”大小：13\]；
cell.textLabel.backgroundColor=\[UIColor clearColor\]；
cell.detailTextLabel.backgroundColor=\[UIColor clearColor\]；
cell.textlab.textColor=\[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0\]；
UIImageView*defaultImage=\[\[UIImageView alloc\]init\]；
\[defaultImage setFrame:CGRectMake（5.0f、5.0f、40.0f、40.0f）\]；
\[单元格添加子视图：默认图像\]；
对于（int i=0；i更改行
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:nil]；
with
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:CellIdentifier]；

编辑

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];


        UIView* bgview = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
        bgview.opaque = YES;
        bgview.tag = 8888;
        bgview.backgroundColor = [UIColor colorWithRed:244.0f/255 green:245.0f/255 blue:246.0f/255 alpha:1.0];
        [cell setBackgroundView:bgview];

        cell.textLabel.font = [UIFont fontWithName:@"Roboto-Light" size:17];
        cell.detailTextLabel.font = [UIFont fontWithName:@"Roboto-Light" size:13];
        cell.textLabel.backgroundColor = [UIColor clearColor];
        cell.detailTextLabel.backgroundColor = [UIColor clearColor];
        cell.textLabel.textColor = [UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0];

        UIImageView *defaultImage = [[UIImageView alloc]init];
        [defaultImage setFrame:CGRectMake(5.0f, 5.0f, 40.0f, 40.0f)];
        defaultImage.contentMode = UIViewContentModeScaleAspectFit;
        defaultImage.tag = 7777;
        [cell.contentView addSubview:defaultImage];

        UILabel *user_name = [[ UILabel alloc]init ];
        user_name.tag = 9999;
        [user_name setFrame:(CGRectMake(58, 5, 270, 25))];
        [user_name setBackgroundColor: [UIColor clearColor]];

        [user_name setFont:[UIFont fontWithName:@"Roboto-Light" size:14]];
        [user_name setTextAlignment:NSTextAlignmentLeft];
        [user_name setTextColor:[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0]];
        [cell.contentView addSubview:user_name];

        AsyncImageView *asyncImageView = [[AsyncImageView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 40.0f, 40.0f)];
        asyncImageView.tag = 6666;
        [asyncImageView setBackgroundColor:[UIColor clearColor]];
        [defaultImage addSubview:asyncImageView];
    }
    [self.exhibitorTableView setSeparatorInset:UIEdgeInsetsMake(0, 0, 0, 0)];
    UIImageView *defaultImage = (UIImageView*)[cell.contentView viewWithTag:7777];
    UILabel *user_name = (UILabel*)[cell.contentView viewWithTag:9999];
    AsyncImageView *asyncImageView = (AsyncImageView*)[defaultImage viewWithTag:6666];
    for (int i=0; i<[self.exhibitorArray count]; i++) {
        NSString * string = [[self.exhibitorArray objectAtIndex:i]valueForKey:@"name"];
        NSString *firstLetter = [string substringToIndex:1];
        if ([[keys objectAtIndex:indexPath.section] isEqualToString:firstLetter] ) {

            NSString *urlString ;
            urlString = @"http://";
            urlString = [urlString stringByAppendingString:[NSString stringWithFormat:@"%@",[[self.exhibitorArray objectAtIndex:i]valueForKey:@"image"]]];
            NSLog(@"%@",urlString);
            NSString *tmp_string = urlString;
            [asyncImageView loadImageFromURL:[NSURL URLWithString:tmp_string]];
            NSString *name_string = [[self.exhibitorArray objectAtIndex:i]valueForKey:@"name"];
            NSLog(@"%@",name_string);
            [user_name setText:name_string];
        }
    }

    [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];

    return cell;
}

-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath
{
静态NSString*CellIdentifier=@“Cell”；
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:CellIdentifier]；
如果（单元格==nil）{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle重用标识符：CellIdentifier]；
UIView*bgview=[[UIView alloc]initWithFrame:CGRectMake（0,0,1,1）]；
bgview.opaque=是；
bgview.tag=8888；
bgview.backgroundColor=[UIColor color withred:244.0f/255 green:245.0f/255 blue:246.0f/255 alpha:1.0]；
[cell setBackgroundView:bgview]；
cell.textlab.font=[UIFont fontWithName:@“Roboto Light”大小：17]；
cell.detailTextLabel.font=[UIFont fontWithName:@“Roboto Light”大小：13]；
cell.textLabel.backgroundColor=[UIColor clearColor]；
cell.detailTextLabel.backgroundColor=[UIColor clearColor]；
cell.textlab.textColor=[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0]；
UIImageView*defaultImage=[[UIImageView alloc]init]；
[默认图像设置帧：CGRectMake（5.0f、5.0f、40.0f、40.0f）]；
defaultImage.contentMode=UIViewContentModeScaleAspectFit；
defaultImage.tag=7777；
[cell.contentView addSubview:defaultImage]；
UILabel*用户名=[[UILabel alloc]init]；
user_name.tag=9999；
[user_name setFrame:（CGRectMake（58,527025））；
[用户名setBackgroundColor:[UIColor clearColor]]；
[用户名setFont:[UIFont fontWithName:@“Roboto Light”大小：14]；
[用户名setTextAlignment:NSTextAlignmentLeft]；
[user_name setTextColor:[UIColor color with red:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0]；
[cell.contentView addSubview:user_name]；
AsyncImageView*AsyncImageView=[[AsyncImageView alloc]initWithFrame:CGRectMake（0.0f，0.0f，40.0f，40.0f）]；
asyncImageView.tag=6666；
[asyncImageView setBackgroundColor:[UIColor clearColor]]；
[defaultImage addSubview:asyncImageView]；
}
[self.exhibitorTableView setSeparatorInset:UIEdgeInsetsMake（0,0,0,0）]；
UIImageView*defaultImage=（UIImageView*）[cell.contentView视图带标记：7777]；
UILabel*用户名=（UILabel*）[cell.contentView视图带标记：9999]；
AsyncImageView*AsyncImageView=（AsyncImageView*）[defaultImage viewWithTag:6666]；
对于（int i=0；i它们没有重叠。每次使用单元格时，您都会添加一个额外的标签

只需向单元格添加一个标签，然后重新使用该标签，而不是每次添加一个新标签

这同样适用于图像视图等

最好的解决方案是使用自定义UITableViewCell子类

可能的解决方案

注意：我不喜欢这个，因为使用了tag属性，但它可以在不子类化UITableviewCell的情况下完成

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

    UIImageView *defaultImageView;
    UILabel *customLabel;

    if (cell == nil) {
        // create the cell and empty views ready to take the content.
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

        defaultImageView = //create the image view
        defaultImageView.tag = 3;
        [cell.contentView addSubview:defaultImageView];

        customLabel = //create custom label
        customLabel.tag = 4;
        [cell.contentView addSubview:customLabel];
    } else {
        // get the views that have already been created
        defaultImageView = [cell.contentView viewWithTag:3];
        customLabel = [cell.contentView viewWithTag:4];
    }

    // now populate the views...

    defaultImageView.image = someImage;
    customLabel.text = @"Hello, world";

    return cell;
}

这样，您只需在单元格中创建一个标签和一个图像视图，然后正确地重用它。
这只是因为您正在每个单元格上创建新标签数据源方法刚刚更改

只需alloc并添加标签即可

if (cell == nil) {
        cell = \[\[UITableViewCell alloc\] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier\];

 **//Allocate label here and set tag**

UILabel *nameLabel = [[UILabel alloc] initwithframe];
[nameLabel setTag:212];

}

 **get label here by tag and set text on it here.**

eg 

UILabel *nameLabel = [cell viewWithTag:212];

同样地，添加imageview内部条件并在外部设置图像，因为这一行已添加多次。要避免这种情况，请尝试以下操作：

UILabel *user_name  = [[ UILabel alloc]init ];
user_name.tag = SomeTagValue;
.
.
.
.
UILabel *preView = [cell viewWithTag:SomeTagValue];
[preView removeFromSuperview];
[cell addSubview:user_name];

您正在添加两个
cell.TextLabel
an
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = \[tableView dequeueReusableCellWithIdentifier:nil\];
    if (cell == nil) {
        cell = \[\[UITableViewCell alloc\] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier\];

    }
    \[self.exhibitorTableView setSeparatorInset:UIEdgeInsetsMake(0, 0, 0, 0)\];

    UIView* bgview = \[\[UIView alloc\] initWithFrame:CGRectMake(0, 0, 1, 1)\];
    bgview.opaque = YES;
    bgview.backgroundColor = \[UIColor colorWithRed:244.0f/255 green:245.0f/255 blue:246.0f/255 alpha:1.0\];
    \[cell setBackgroundView:bgview\];

    UIImageView *defaultImage = \[\[UIImageView alloc\]init\];
    \[defaultImage setFrame:CGRectMake(5.0f, 5.0f, 40.0f, 40.0f)\];
    \[cell addSubview:defaultImage\];

    for (int i=0; i<\[self.exhibitorArray count\]; i++) {
        NSString * string = \[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"name"\];
        NSString *firstLetter = \[string substringToIndex:1\];
    if (\[\[keys objectAtIndex:indexPath.section\] isEqualToString:firstLetter\] ) {

    NSString *urlString = \[\[NSString alloc\]init\];
    urlString = @"http://";
    urlString = \[urlString stringByAppendingString:\[NSString stringWithFormat:@"%@",\[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"image"\]\]\];
    NSLog(@"%@",urlString);

    AsyncImageView *asyncImageView = \[\[AsyncImageView alloc\] initWithFrame:CGRectMake(0.0f, 0.0f, 40.0f, 40.0f)\];
    \[asyncImageView setBackgroundColor:\[UIColor clearColor\]\];
    NSString *tmp_string = \[\[NSString alloc\]init\];
    tmp_string = urlString;
    \[asyncImageView loadImageFromURL:\[NSURL URLWithString:tmp_string\]\];
    \[defaultImage addSubview:asyncImageView\];
    defaultImage.contentMode = UIViewContentModeScaleAspectFit;
    tmp_string = nil;
    asyncImageView = nil;
    defaultImage = nil;

    NSString *name_string = \[\[NSString alloc\]init\];
    name_string = \[\[self.exhibitorArray objectAtIndex:i\]valueForKey:@"name"\];
    NSLog(@"%@",name_string);
    UILabel *user_name = \[\[ UILabel alloc\]init \];
    \[user_name setFrame:(CGRectMake(58, 5, 270, 25))\];
    \[user_name setBackgroundColor: \[UIColor clearColor\]\];
    \[user_name setText:name_string\];
    \[user_name setFont:\[UIFont fontWithName:@"Roboto-Light" size:14\]\];
    \[user_name setTextAlignment:NSTextAlignmentLeft\];
    \[user_name setTextColor:\[UIColor colorWithRed:93.0f/255 green:94.0f/255 blue:94.0f/255 alpha:1.0\]\];
    \[cell addSubview:user_name\];
    user_name = nil;
        }
    }

    \[cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator\];

    return cell;
}