我正在使用 tableview 和显示数据。在表中查看所有已发送邮件的 checkMark 项目。但是当滚动表格时，复选标记未被选中。我不想在滚动表格时取消选中。请帮我。我正在开发以下代码
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CustomCellIdentifier = @"CustomCellIdentifier ";
CaptureCell *cell = (CaptureCell *)[tableView dequeueReusableCellWithIdentifier: CustomCellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CaptureCell"
owner:self options:nil];
for (id oneObject in nib) if ([oneObject isKindOfClass:[CaptureCell class]])
cell = (CaptureCell *)oneObject;
}
if ([[[dataArray objectAtIndex:indexPath.row] objectForKey:@"CaptureId"]isEqualToString:[dict objectForKey:[[dataArray objectAtIndex:indexPath.row] objectForKey:@"CaptureId"]]])
{
cell.confirmMail.image = [UIImage imageNamed:@"mailConfirm.png"];
}
NSString *input;
input = [[dataArray objectAtIndex:indexPath.row]objectForKey:@"amount"];
[input stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
//NSLog(@"after removing white spaces %@",input);
double price;
NSString *numberAsString = nil;
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
NSLocale *gbLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
[numberFormatter setLocale:gbLocale];
[gbLocale release];
[numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle];
if ([[input stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]length]!=0)
{
NSLog(@"the input is***** %@",input);
price=[[input stringByReplacingOccurrencesOfString:@"$" withString:@""] doubleValue];
NSLog(@"the price is %f",price);
numberAsString = [numberFormatter stringFromNumber:[NSNumber numberWithDouble:price]];
NSLog(@"the numberAsString...... %@",numberAsString);
}
[numberFormatter release];
cell.eventNameLbl.text = [[dataArray objectAtIndex:indexPath.row]objectForKey:@"expenseType"];
cell.expenTypeLbl.text = [[dataArray objectAtIndex:indexPath.row]objectForKey:@"empName"];
cell.dataLbl.text = [[dataArray objectAtIndex:indexPath.row]objectForKey:@"Date"];
cell.amountLbl.text = numberAsString;
cell.billImage.image = [UIImage imageWithData:[[dataArray objectAtIndex:indexPath.row]objectForKey:@"image"]];
//[cell.textLabel setText:[NSString stringWithFormat:@"Row %d", indexPath.row]];
cell.selectionStyle=UITableViewCellSelectionStyleNone;
NSIndexPath* selection = [tableView indexPathForSelectedRow];
if (selection && selection.row == indexPath.row) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
// if([[[captureArray objectAtIndex:indexPath.row]objectForKey:@"eventName"]isEqualToString:[[selectedData objectAtIndex:indexPath.row]objectForKey:@"eventName"]])
// NSLog(@"Equal");
//[cell setEditing:YES animated:YES];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSString *selected = [dataArray objectAtIndex:indexPath.row];
if([tableView isEditing] == YES)
{
AppDelegate *sharedDelegate = [[UIApplication sharedApplication]delegate];
sharedDelegate.isEditCapture = YES;
sharedDelegate.findDate = YES;
NSString *imgDataStr = [[NSString alloc]initWithData:[[dataArray objectAtIndex:indexPath.row]objectForKey:@"image"] encoding:NSUTF8StringEncoding];
NSLog(@"imageStr%@",imgDataStr);
ExpensesCaptureViewController_iPhone *nextController = [[ExpensesCaptureViewController_iPhone alloc] initWithNibName:@"ExpensesCaptureViewController_iPhone" bundle:nil];
nextController.captureId = [[dataArray objectAtIndex:indexPath.row] objectForKey:@"CaptureId"];
[self.navigationController pushViewController:nextController animated:YES];
[imgDataStr release];
[nextController release];
if([selectedData count]>0)
{
[selectedData removeObject:selected];
}
}
else {
if ([[[dataArray objectAtIndex:indexPath.row] objectForKey:@"CaptureId"]isEqualToString:[dict objectForKey:[[dataArray objectAtIndex:indexPath.row] objectForKey:@"CaptureId"]]])
{
NSLog(@"sent items");
}
else {
if (cell.accessoryType == UITableViewCellAccessoryNone)
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[selectedData addObject:selected];
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
[selectedData removeObject:selected];
}
}
}
NSLog(@"DataObjects %d %@",[selectedData count] ,[[dataArray objectAtIndex:indexPath.row] objectForKey:@"eventName"]);
//[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone];
}
最佳答案
当调用 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 方法并设置时滚动 tableView 的问题
NSIndexPath* selection = [tableView indexPathForSelectedRow];
if (selection && selection.row == indexPath.row) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
这意味着当您滚动时，indexPath 将仅针对当前行，因此当前行的复选标记仍将被选中，但所有其他行将进入 else 条件并且复选标记将被删除。
要修复它，您应该执行以下操作:
定义以下属性:
@property (nonatomic)BOOL isViewIsLoadedForTheFirstTime;
-(void)viewDidLoad
{
self.isViewIsLoadedForTheFirstTime = YES;
}
然后在 (cellForRow) 方法中替换这些行
if (selection && selection.row == indexPath.row) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
到以下几行:
if (self.isViewIsLoadedForTheFirstTime) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
self.isViewIsLoadedForTheFirstTime = NO;
}
这将使您仅在第一次加载 View 时设置复选标记，当您滚动时它不会改变。
希望对你有帮助
关于objective-c - 滚动表格 View 时未选中复选标记，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13395306/