Is it possible to get IndexPath currently inserting new row into a table. The table data is loaded through the Core Data. The datas are sorted through the sections.
I would like to make a new added row to the table to be animated as shown in the following picture link.
http://i45.tinypic.com/2ykjj7n.png
You can use following method:
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
The code is tested, and will definitely work for you...
What about this? Is this what you want to gather? I am not sure.
[yourTableView beginUpdates];
[yourTableView moveRowAtIndex:firstStateIndex toIndex:endStateIndex];
[yourTableView endUpdates];
Of course you have to insert the specific row at first so that you can move it afterwards. The animation could happen like this.
[tblMainView beginUpdates];
[tblMainView reloadRowsAtIndexPaths:<#(NSArray *)#> withRowAnimation:UITableViewRowAnimationLeft];
[tblMainView endUpdates];
Related
I have a tableview where I want to reload (and change the height of) just the sectionHeader but not the cells inside this section. The reason I want to do this is because I use the fade animation on the header, like so:
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:0]
withRowAnimation:UITableViewRowAnimationFade];
But at the same time I am adding a cell in that section with
[self.tableView insertRowsAtIndexPaths:
#[[NSIndexPath indexPathForRow:0 inSection:0]]
withRowAnimation:UITableViewRowAnimationRight];
I'd like to be able to keep the UITableViewRowAnimationRight for the cell that is being added, but when I reload the Section, the fade animation gets applied to the whole section. Is there any way to just reload the sectionHeader, and not the cells in the section?
Just create 2 separate brackets of
[tableView beginUpdates];
[tableView endUpdates];
for the two insertions / changes.
I am adding a new item to the bottom of a UITableView and after inserting the item, I want the UITableView to scroll to the very bottom to display the newly inserted item. New items are saved to Core Data and the UITableView is automatically updated using NSFetchedResultsController.
- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
atIndexPath:(NSIndexPath *)indexPath
forChangeType:(NSFetchedResultsChangeType)type
newIndexPath:(NSIndexPath *)newIndexPath
{
switch (type) {
case NSFetchedResultsChangeInsert:
NSLog(#"*** controllerDidChangeObject - NSFetchedResultsChangeInsert");
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
//THIS IS THE CODE THAT DOESN'T WORK
[self.tableView scrollToRowAtIndexPath:newIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
break;
....
}
This leads to an out of bounds error, I can't seem to make it work. I can scroll to the second to last comment by adjusting the row of the index path, but I can't get to the very last item.
Basically, I'm adding a comment to a table of comments and after a comment is added, I want the table to scroll to the most recent comment.
You need to call endUpdates so that the tableView can calculate its new sections and rows. A simple case would look like this:
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:insertedIndexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
[self.tableView scrollToRowAtIndexPath:insertedIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
As you use NSFetchedResultsController, it is a bit more complicated, as the calls do beginUpdates, insertRowsAtIndexPaths:withRowAnimation:, and endUpdates are typically in different delegate methods. What you could do then is
add a property insertedIndexPath to store the inserted index path
after the -insertRowsAtIndexPaths:withRowAnimation: call in -controller:didChangeObject:atIndexPath:, add
self.insertedIndexPath = insertedIndexPath;
after [self.tableView endUpdates] in -controllerDidChangeContent:, add
if (self.insertedIndexPath) {
[self.tableView scrollToRowAtIndexPath:self.insertedIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
self.insertedIndexPath = nil;
}
See if this helps...
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
[self.tableView scrollToRowAtIndexPath:newIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
I have a UITableView. I'm population it from a NSDictionary with arrays for each set of items on the table: labels, footers, Headers, UIViews, etc.
In section 0, I want a row #2 appear when a switch in row #1 is switched to on.
What I have done and it works is, in numberOfRowsInSection I added this code:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (interruptor.isOn==NO && section==0) {
return [[[infoTableContentArray objectAtIndex: section] objectForKey:kLabelKey] count]-1;
}else{
return [[[infoTableContentArray objectAtIndex: section] objectForKey:kLabelKey] count];
}
}
and the action linked to the switch (interruptor) is:
-(IBAction)accioInterruptor:(id)sender{
[infoAndSettingsTable reloadData];
}
so when the switch is switched, the table reloads and the cell appears or disappears.
it actually works, but there is no animation, which makes it, mhh... well, you know.
I've tried to implement the reloadRowsAtIndexPaths:withRowAnimation, adding it to the code called by the switch:
-(IBAction)accioInterruptor:(id)sender{
[infoAndSettingsTable beginUpdates];
[infoAndSettingsTable reloadRowsAtIndexPaths:[[infoTableContentArray objectAtIndex: 0] objectForKey:kLabelKey] withRowAnimation:UITableViewRowAnimationBottom];
[infoAndSettingsTable endUpdates];
}
But, it dowsn't work. It crashed on the line [infoAndSettingsTable endsUpdates];
BTW, in all the cases the following:
[[infoTableContentArray objectAtIndex: 0]
is the array which contains the labels for that section.
Am I doing it right or I'm Epic-Failing alltogether?
Thanks in advance!
simple way to do this......
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView deleteRowsAtIndexPaths:deleteIndexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
insertIndexPaths is an array of NSIndexPaths to be inserted to your table.
deleteIndexPaths is a array of NSIndexPaths to be deleted from your table.
Example array format for index paths :
NSArray *insertIndexPaths = [[NSArray alloc] initWithObjects:
[NSIndexPath indexPathForRow:0 inSection:0],
[NSIndexPath indexPathForRow:1 inSection:0],
[NSIndexPath indexPathForRow:2 inSection:0],
nil];
got it from this question
the argument to reloadRowsAtIndexPaths: should be an array of NSIndexPath objects identifying the rows you want to reload, not the labels for that section. Also, looks like you want to reload a section so I would try the following:
-(IBAction)accioInterruptor:(id)sender {
[self reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationBottom];
}
Why don't you just use UITableView's insertRowsAtIndexPaths:withRowAnimation:? It has been built exactly for this purpose, the UITableView class reference has the exact description and usage examples.
Apart from being cleaner it is also more performant since you don't have to reload the entire table (only really matters if you have lots of cells in it though)
I sometimes reload table data and I need to redraw the table so that I see the data from the first row again. What I do now is the following:
NSIndexPath *ip = [NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView selectRowAtIndexPath:ip animated:NO scrollPosition:UITableViewScrollPositionTop ];
[self.tableView deselectRowAtIndexPath:ip animated:NO];
This is not ideal because there is an annoying flash when row 0 is selected and immediately deselected.
How can I fix this?
You can use UITableView's scrollToRowAtIndexPath:atScrollPosition:animated: method.
[tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES];
If you have a header that is in view by default, and want to compensate if the action is called when the list is in motion use:
[tableview setContentOffset:CGPointMake(0.0, 0.0) animated:NO];
Short, simple, effective.
You can set contentoffset of tableview to (0.,0.).
I have a tableview on a nib file with the interaction setting turned off. I'm animating a section change like this:
[myTableView beginUpdates];
[myTableView deleteSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:YES];
[myTableView insertSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:YES];
[myTableView endUpdates];
The problem is that, when I do this, the rows become selectable. How do I keep the interaction disabled while keeping the animation?
use this
self.tableView.userInteractionEnabled=NO;