我创建了UITableView并添加了标签和按钮。在上下滚动桌子时，自动标记＆amp;按钮是重复的和相同的标签＆amp;按钮出现超过两到三个。怎么避免这个？
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"SimpleTableItem";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
// [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
// Set up the cell...
if(indexPath.section == 0)
{
cell.textLabel.text = [propertyDetails objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
if (indexPath.row==0)
{
UIView *myAmount = [[UIView alloc]initWithFrame:CGRectMake(200, 10, 90, 30)];
myAmount.backgroundColor = [UIColor blueColor];
[cell addSubview:myAmount];
//cell.accessoryView = myAmount;
UILabel *dollarSymbol = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 20, 30)];
[dollarSymbol setText:@"$"];
dollarSymbol.backgroundColor = [UIColor greenColor];
[myAmount addSubview:dollarSymbol];
UITextField *amountEntered = [[UITextField alloc]initWithFrame:CGRectMake(20, 0, 70, 30)];
amountEntered.placeholder = @"Amount";
amountEntered.backgroundColor = [UIColor redColor];
[myAmount addSubview:amountEntered];
}
if (indexPath.row==1)
{
UIView *myDeposit = [[UIView alloc]initWithFrame:CGRectMake(200, 10, 90, 30)];
myDeposit.backgroundColor = [UIColor blueColor];
[cell addSubview:myDeposit];
UILabel *percentageSymbol = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 20, 30)];
[percentageSymbol setText:@"%"];
percentageSymbol.backgroundColor = [UIColor greenColor];
[myDeposit addSubview:percentageSymbol];
UITextField *depositPer = [[UITextField alloc]initWithFrame:CGRectMake(20, 0, 70, 30)];
depositPer.placeholder = @"Amount";
depositPer.backgroundColor = [UIColor redColor];
[myDeposit addSubview:depositPer];
}
}
else if(indexPath.section == 1)
{
cell.textLabel.text = [suburbSelect objectAtIndex:indexPath.row];
if (indexPath.row==0)
{
UIView *enterSuburb = [[UIView alloc]initWithFrame:CGRectMake(150, 10, 140, 30)];
enterSuburb.backgroundColor = [UIColor blueColor];
[cell addSubview:enterSuburb];
UITextField *suburbField = [[UITextField alloc] initWithFrame:CGRectMake(0,0,140,30)];
suburbField.placeholder = @"Enter Suburb";
suburbField.backgroundColor = [UIColor redColor];
[enterSuburb addSubview:suburbField];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
if (indexPath.row==1) {
UIButton *homeBtn = [[UIButton alloc]initWithFrame:CGRectMake(50, 10, 50, 30)];
homeBtn.backgroundColor = [UIColor redColor];
[homeBtn setTitle:@"Home" forState:UIControlStateNormal];
UIButton *unitBtn = [[UIButton alloc] initWithFrame:CGRectMake(150, 10, 50, 30)];
unitBtn.backgroundColor = [UIColor greenColor];
[unitBtn setTitle:@"Unit" forState:UIControlStateNormal];
[cell addSubview:homeBtn];
[cell addSubview:unitBtn];
}
if (indexPath.row==2) {
UIView *myYear = [[UIView alloc]initWithFrame:CGRectMake(200, 10, 90, 30)];
myYear.backgroundColor = [UIColor blueColor];
[cell addSubview:myYear];
UITextField *enterYear = [[UITextField alloc]initWithFrame:CGRectMake(0, 0, 90, 30)];
enterYear.placeholder = @"Years";
enterYear.backgroundColor = [UIColor redColor];
[myYear addSubview:enterYear];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
}
else if(indexPath.section == 2)
{
cell.textLabel.text = [result objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.accessoryView = nil;
}
else if(indexPath.section == 3)
{
cell.textLabel.text = [compareSuburb objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.accessoryView = nil;
}
else if(indexPath.section == 4)
{
cell.textLabel.text = [SuburbTwoCompare objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.accessoryView = nil;
}
else if(indexPath.section == 5)
{
cell.textLabel.text = [resultCompare objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.accessoryView = nil;
}
else if(indexPath.section == 6)
{
cell.textLabel.text = [gainLoss objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.accessoryView = nil;
}
else
{
return 0;
}
return cell;
}
答案 0 :(得分：1)
UILabel *lblFirst=nil;
UILabel *lblSecond=nil;
UILabel *lblThird=nil;
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:style reuseIdentifier:MyIdentifier] autorelease];
if([[[UIDevice currentDevice] systemVersion] floatValue]>=7.0)
{
lblFirst = [[UILabel alloc] initWithFrame:CGRectMake(45, 0, 400,
40)] ;
}
else
{
lblFirst = [[UILabel alloc] initWithFrame:CGRectMake(40, 0, 400,
40)] ;
}
lblFirst.tag=1;
[self labelCommonSettingsLeftAlign:lblFirst];
[cell.contentView addSubview:lblFirst];
//----------------------------------------
//start time
if([[[UIDevice currentDevice] systemVersion] floatValue]>=7.0)
{
lblSecond = [[UILabel alloc] initWithFrame:CGRectMake(45, 25, 250,
40)] ;
}
else
{
lblSecond = [[UILabel alloc] initWithFrame:CGRectMake(40, 25, 250,
40)] ;
}
lblSecond.tag=2;
[self labelCommonSettingsLeftAlign:lblSecond];
[cell.contentView addSubview:lblSecond];
//end time
if([[[UIDevice currentDevice] systemVersion] floatValue]>=7.0)
{
lblThird = [[UILabel alloc] initWithFrame:CGRectMake(260, 25, 250.0,
40)] ;
}
else
{
lblThird = [[UILabel alloc] initWithFrame:CGRectMake(260, 25, 250.0,
40)] ;
}
lblThird.tag=3;
[self labelCommonSettingsLeftAlign:lblThird];
[cell.contentView addSubview:lblThird];
[lblFirst release];
lblFirst=nil;
[lblSecond release];
lblSecond=nil;
[lblThird release];
lblThird=nil;
}
lblFirst = (UILabel *)[cell.contentView viewWithTag:1];
lblSecond = (UILabel *)[cell.contentView viewWithTag:2];
lblThird = (UILabel *)[cell.contentView viewWithTag:3];
然后使用标签设置文本或其他内容。 简而言之，只有在您创建单元格对象时才分配标签。下次重复使用它。
我希望这对你有用：）
答案 1 :(得分：0)
在重复使用单元格期间多次添加标签和按钮，这就是为什么会导致重复。错误在此行[cell addSubview:myAmount];中。在添加视图之前，请检查它是否已在可重复使用的单元格中添加。只需执行以下步骤即可。
首先想一想，我注意到，你使用了两种类型的细胞，所以使用两种类型 用于创建和检索单元格的可重用标识符。
UIView *myAmount = [cell viewWithTag:AMOUNTTAG];
if (!myAmount)
{
myAmount = [[UIView alloc]initWithFrame:CGRectMake(150, 10, 140, 30)];
myAmount.backgroundColor = [UIColor blueColor];
myAmount.tag = AMOUNTTAG;
[cell addSubview:myAmount];
}
为了保持添加的视图，请执行此操作。
答案 2 :(得分：0)
如果您的单元格有多种类型，则应创建许多标识符。 像这样：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifierRow0 = @"CellRow0";
static NSString *identifierRow1 = @"CellRow1";
static NSString *identifierRow2 = @"CellRow2";
UITableViewCell *cell = nil;
if (indexPath.row == 0) {
cell = [tableView dequeueReusableWithIdentifier:identifierRow0];
} else if (indexPath.row == 1) {
cell = [tableView dequeueReusableWithIdentifier:identifierRow1];
} eles if (indexPath.row == 2) {
cell = [tableView dequeueReusableWithIdentifier:identifierRow2];
}
if (cell == nil) {
if (indexPath.row == 0) {
UIView *enterSuburb = [[UIView alloc]initWithFrame:CGRectMake(150, 10, 140, 30)];
enterSuburb.backgroundColor = [UIColor blueColor];
[cell addSubview:enterSuburb];
UITextField *suburbField = [[UITextField alloc] initWithFrame:CGRectMake(0,0,140,30)];
suburbField.placeholder = @"Enter Suburb";
suburbField.backgroundColor = [UIColor redColor];
[enterSuburb addSubview:suburbField];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else if (indexPath.row == 1) {
UIButton *homeBtn = [[UIButton alloc]initWithFrame:CGRectMake(50, 10, 50, 30)];
homeBtn.backgroundColor = [UIColor redColor];
[homeBtn setTitle:@"Home" forState:UIControlStateNormal];
UIButton *unitBtn = [[UIButton alloc] initWithFrame:CGRectMake(150, 10, 50, 30)];
unitBtn.backgroundColor = [UIColor greenColor];
[unitBtn setTitle:@"Unit" forState:UIControlStateNormal];
[cell addSubview:homeBtn];
[cell addSubview:unitBtn];
} else if (indexPath.row == 2) {
UIView *myYear = [[UIView alloc]initWithFrame:CGRectMake(200, 10, 90, 30)];
myYear.backgroundColor = [UIColor blueColor];
[cell addSubview:myYear];
}
// code for updating cell
return cell;
}