I am trying to insert row at the top of the table. Firstly insert into the data:
[self.myDataArray insertObject:scannedItem atIndex:0];
Then I call reloadData for the table. Item inserted but table scrolls up, item doesn't visible and it is possible to scroll all items out of the top bound. I have no dynamic cells and also have estimatedRowHeight set as const integer(60).
Here is screens for tableview
[self.tableView beginUpdates];
[self.myDataArray insertObject:scannedItem atIndex:0];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:#[[NSIndexPath indexPathForRow:indexPath inSection:0]]
withRowAnimation:UITableViewRowAnimationRight];
[self.tableView endUpdates];
Related
I am doing very usual stuff.
First modifying the data model and then updating the TableView. But sometimes app crashes.
And throws error something like that (depends on insertion or deletion).
Fatal Exception: NSInternalInconsistencyException
Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (10) must be equal to the number of rows contained in that section before the update (10), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).
Here is my insertion code.
[self.tableView beginUpdates];
[self.stories insertObject:story atIndex:0];
NSArray *indexPaths = #[[NSIndexPath indexPathForRow:0 inSection:0]];
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
and Deletion code.
[tableview beginUpdates];
[stories removeObject:story];
NSIndexPath *indexpath = [tableview indexPathForCell:cell];
if(indexpath) {
[tableview deleteRowsAtIndexPaths:#[indexpath] withRowAnimation:UITableViewRowAnimationTop];
}
[tableview endUpdates];
Insertion Code:
[self.stories insertObject:story atIndex:0];
[self.tableView beginUpdates];
NSArray *indexPaths = #[[NSIndexPath indexPathForRow:0 inSection:0]];
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
Deletion Code:
[stories removeObject:story];
[tableview beginUpdates];
NSIndexPath *indexpath = [tableview indexPathForCell:cell];
[tableview deleteRowsAtIndexPaths:#[indexpath] withRowAnimation:UITableViewRowAnimationTop];
[tableview endUpdates];
Note: You should not add/remove object to an array inside updating your tableview's rows.
Either do [tableview reloadData]; or [self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
Also you are doing database operation in-between [self.tableView beginUpdates];
and [self.tableView endUpdates];. It's not proper.
As per the error suggests, there is a mismatch in table view rows and data source of that table view.
I have a swift table view/collection view. Is there anyway I could append items to the end of the container ? Like an upside down stack or something ?
You need insert rows at in UITableView and collection view for that first need to insert in you data source.
For TableView
//Update data source with the object that you need to add
[tableDataSource addObject:newObject];
NSInteger row = [tableDataSource count]-1 ;//specify a row where you need to add new row in your case last
NSInteger section = //specify the section where the new row to be added,
//section = 0 here since you need to add row at first section
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationRight];
[self.tableView endUpdates];
For CollectionView
[self.myCollectionView performBatchUpdates:^{
[collectionDataSource addObject:newObject];
NSInteger row = [collectionDataSource count]-1 ;//specify a row where you need to add new row in your case last
to add new row in your case last
NSInteger section = //specify the section where the new row to be added,
//section = 0 here since you need to add row at first section
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
[self.myCollectionView insertItemsAtIndexPath: indexPath];
} completion:nil];
I have an issue where I have a UITableViewController and when the view appears I do some calculations asynchronously which should result in the updating of specific rows in the table.
Inside the cellStartEditing function I calculate the necessary rows that need to be updated as follows:
-(void) cellStartEditing:(templateRow *) row{
int Cellowid= row.rowId;
[arrQuestions removeObjectAtIndex:CellRowid];
[arrQuestions insertObject:row atIndex:CellRowid];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow: inSection:0];
[tvQuestion reloadRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationNone];
}
At that time reloadRowsAtIndexPaths Animation gain to 50% CPU Memory ?
Notify about tableview updates before reloading the rows as below:
[tvQuestion beginUpdates];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow: inSection:0];
[tvQuestion reloadRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationNone]
[tvQuestion endUpdates];
I need to add a new row under the selected row. I'm using this code in didSelectRowAtIndexPath:
[_dataSource insertObject:newDataObject atIndex:indexPath.row + 1];
NSMutableArray *indexPaths = [NSMutableArray array];
NSInteger currentCount = indexPath.row;
[indexPaths addObject:[NSIndexPath indexPathForRow:currentCount+1 inSection:0]];
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
[self.tableView endUpdates];
It adds the new row in the correct position, but it also deletes the upper cell separator of the selected row. What am I doing wrong?
Seems like UITableViewCell has no separator in selected state. UITableViewCellSelectionStyleNone just disables highlighting, but cell is selected anyway. adding
[tableView beginUpdates];
// insert/delete manipulations
[tableView deselectRowAtIndexPath:indexPath animated:NO];
[tableView endUpdates];
fixes the problem
i have a menu that contain 6 cells 1st one contain UIViewController the second contain UITableView
when i click the first cell a new page appear,and it contain a button
when i click this button i want access to the second cell from the Menu, that contain a tableView
// use this code for to Refresh or delete or insert TableviewCell
// reloading cell
NSIndexPath *tmpIndexpath=[NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:tmpIndexpath, nil] withRowAnimation:UITableViewRowAnimationTop];
// inserting cell
NSIndexPath *tmpIndexpath=[NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObjects:tmpIndexpath, nil] withRowAnimation:UITableViewRowAnimationTop];
// deleting cell
NSIndexPath *tmpIndexpath=[NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:tmpIndexpath, nil] withRowAnimation:UITableViewRowAnimationBottom];
As much i understand your question you want to move from a tableview to other view on click..So,you have to use code similar to this..
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
Detail *img1=[[Detail alloc]initWithNibName:#"Detail" bundle:Nil];
img1.labelString = [titleArray objectAtIndex:indexPath.row];
[self presentViewController:img1 animated:YES completion:nil];
}
Write following coed in your UIButton Tapped Method.
-(void) ButtonTapped:(UIButton *) sender
{
NSIndexPath *indexpathNew = [self.tblView indexPathForCell:(UITableViewCell *)[sender superview]];
NSLog(#"%#",indexpathNew.row);
}
indexpathNew is return indextPath of selected button of cell.
Try my code i might be helpful to you.