UITableView单元格重叠
我实现了一个带有节索引的tableView。每当任何特定部分中的行多于一行时，我的tableViewCells就会重叠。
这是我的代码。
![- (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;
}
5 个答案:
答案 0 :(得分：7)
他们没有重叠。每次使用单元格时都会添加一个附加标签。
您只需要向单元格添加一个标签，然后重复使用该标签，而不是每次都添加新标签。
图像视图等同样如此......
您最好的解决方案是使用自定义UITableViewCell子类... http://www.appcoda.com/customize-table-view-cells-for-uitableview/
可能的解决方案
注意：由于使用了tag属性，我不喜欢这样，但是如果没有子类化UITableviewCell就可以完成...
- (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，然后重新使用它。
答案 1 :(得分：0)
使用UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier: CellIdentifier];
修改
- (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;
}
答案 2 :(得分：0)
这只是因为你在每个单元数据源方法上创建新标签只需更改
只需在
中分配和添加标签即可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];
同样在条件内添加imageview并在外面设置图像
答案 3 :(得分：0)
由于此行[cell addSubview:user_name];它已添加多次。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];
答案 4 :(得分：0)
您要添加cell.TextLabel和另一个标签（命名为：user_name）。如果您想要一个带有imageview和标签的自定义表格单元格，您可以看到this。
正如您在输出中看到的那样，标签重叠。它们不是同一个标签，它们是单元格中的不同标签。希望这有助于.. :)）
编辑：试试这个：
- (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;
}
相关问题
最新问题
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？