I want to remove a specific cell from a UITableView
I found deleteRowsAtIndexPaths:withRowAnimation:
I tried to change the cell.frame to 0,0,0,0
I tried to .hidden = YES it
nothing works for me.
Any ideas?
Thank you!
Try adding the begin and end calls for editing:
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:deletePaths withRowAnimation:UITableViewRowAnimationFade];
[tableView endUpdates];
Alternatively, if you are working with an underlying data source, remove the object from the datasource and call [tableView reloadData];
Use this method to remove the cell from your table view and hand to hand remove the same objects from your array by which you are showing data on tableview.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[yourArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YES];
}
[tableView reloadData];
}
Hope this will help you..
Related
Can some one suggest what is the problem in my code.....
self.modleClass.foldersAray have one object and tableview have one section and one row
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[self.tableview setEditing:YES animated:YES];
[self.modleClass.foldersAray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YEs];
[tableView reloadData];
}
}
I am getting error as below.
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (1) must be equal to the number of rows contained in that section before the update (1), 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).'
Do like this,
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.modleClass.foldersAray removeObjectAtIndex:indexPath.row];
[tableView reloadData];
}
}
it is more enough.........
If your tableView is based on the foldersAray, then removing an object from this array and reloading the tableview will result in the deletion of this cell.
You could remove the line:
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:YEs];
This error means, that you must update you datasource (array with data, dictionary or whatever you use)
For example:
You have 5 cells before delete and 5 object in dataArray. Before call to deleteRowsAtIndexPaths: we must remove object from dataArray, that associated with this cell and only then call deleteRowsAtIndexPaths:. Also instead use [tableView reloadData], use
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[tableView endUpdates];
P.S. I see, that you remove object from your datasource, so check it carefully, maybe you miss something
If you want animation try this, if you dont want animation use #Mountain Lion's answer.
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[self.modleClass.foldersAray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]withRowAnimation:UITableViewRowAnimationFade];
}
}
And if you have edit button on navigation, you should call
[self.tableView setEditing:YES animated:YES];
inside of your method to start editting.
IF the memory it takes does not matter for you... then you can dramatically delete (hide) cell by setting height to 0.
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row%2) {
return 0;
}
return 100;
}
P.S: above dummy code will dramatically delete alternate cells.
I have a table view, data were retrieved from database and display in the table rows.
I have a remove button at the top navigation bar from removing table row.
When button is tapped, a red circle delete icon will appear.
After I select delete, it gave me and error call "Program received signal SIGABRT" at the [tableViewDelete rows......]
This is my code.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
Object = [array objectAtIndex:indexPath.row];
[ClassA ClassAMethod:[appDelegate getDBPath] :Object.ID];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
How do I remove a row from the table view?
Does anybody have any ideas or has anybody else achieved anything similar?
Thanks
I assume this line:
[ClassA ClassAMethod:[appDelegate getDBPath] :Object.ID];
deletes your object from database, while table is filled from some array instance - you need to delete an object from that array as well to maintain data integrity (array must be NSMutableArray instance):
Object = [array objectAtIndex:indexPath.row];
[ClassA ClassAMethod:[appDelegate getDBPath] :Object.ID];
// Add the following line
[array removeObjectAtIndex:indexPath:row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
try this code in editing delegate method of tableview:--
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[[self displayedObjects] removeObjectAtIndex:[indexPath row]];
// Animate deletion
NSArray *indexPaths = [NSArray arrayWithObject:indexPath];
[[self tableView] deleteRowsAtIndexPaths:indexPaths
withRowAnimation:UITableViewRowAnimationFade];
}
i hope this can solve your problem
I have lots of data and lots of rows in my tableView.
when data changes I want to update my visible cells on the screen, I really don't want to use reloadData because it's an expensive call.
Is it possible to somehow update the visible cells only?
I tried calling : beginUpdate & endUpdate on the table, but that doesn't work all the time?
Any suggestions?
You can:
[tableView reloadRowsAtIndexPaths:[tableView indexPathsForVisibleRows]
withRowAnimation:UITableViewRowAnimationNone];
For Swift 3:
tableView.reloadRows(at: tableView.indexPathsForVisibleRows!, with: .none)
Try calling 'deleteRowsAtIndexPaths', a method of UITableView, right after you delete the model from your data source. For example, if you are deleting a row in editing mode, you could write something like the code below. Note that the first line in the 'if' statement removes the object from the data source, and the second line cleans up the table:
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if ( editingStyle == UITableViewCellEditingStyleDelete ) {
[[[[[ItemsStore sharedStore] parameterArray] objectAtIndex:indexPath.section] objectForKey:#"data"] removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
i have one section table which contain the section and i want to delete the perticular cell swap and delete this cell and remove that cell from table and also remove from the array.
and how to animate that when the delete the cell.
for that i code below but which is not working please help to do this.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[self.reports removeObjectAtIndex:indexPath.row];
[tbl reloadData];
[tbl deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
}
}
After much more R&D then i build up new code and which is successfully Run
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[[[self.reports objectAtIndex:indexPath.section] valueForKey:#"events"] removeObjectAtIndex:indexPath.row];
[tbl deleteRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section]] withRowAnimation:UITableViewRowAnimationLeft];
[NSTimer scheduledTimerWithTimeInterval: 0.1 target: self selector: #selector(tableReload) userInfo: nil repeats: NO];
}
}
-(void)tableReload{
[tbl reloadData]; }
Firstly you should not Reload table before deleting row from table. Secondly, in your case you have multiple sections and multiple rows in that section, I guess. So, your
[tbl deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
won't work.
Deleting object from array will work. You don't have to delete row from your table. Just reload table :
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[self.reports removeObjectAtIndex:indexPath.row];
[tbl reloadData];
}
But do take care that you are putting the correct indexNumber.
You are not nil terminating your NSArray and that is why the row isn't being deleted from your Table View.
The following line:
[tbl deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
Should actually be:
[tbl deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil]
withRowAnimation:UITableViewRowAnimationFade];
Notice the nil after IndexPath. arrayWithObjects should be a nil terminated list of Objects
I have a problem when trying to delete rows from my UITableView:
The UITableView gets the number of rows from NSMutableArray:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [alertsArray count];
}
I add objects to the NSMutableArray in this way:
- (void)saveButton:(id)sender {
[alertsArray addObject:
[self.tableView reloadData];
}
With this code I allow to delete rows:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
[self.tableView deleteRowsAtIndexPaths:[NSMutableArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[alertsArray removeObjectAtIndex:indexPath.row];
[tableView reloadData];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
From some reason, when trying to delete rows, the application crashes.
Thanks!
You should only do
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
[alertsArray removeObjectAtIndex:indexPath.row];
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
That is, correct your model first, and then call deleteRowsAtIndexPaths:
You will find the appropriate error message in the console window, BTW.
Also, in general no need to use reloadData here, when you didn't change other things as well.