copy row to another section in UITableView - ios

Question

I have a tableView with with some sections and each section with some rows.Every row has a favorite button.If the button is clicked the row should get added to the favourites section.
(which is initially empty).
I have written some code.but the problem is it is working in iOS 5 simulator and getting crashed in iOS 6 simulator with Invalid tableView update error.
Can someone tell me where the problem is.?
-(void)moveRowToFavourites:(id)sender{
UIButton *button = (UIButton *)sender;
UITableViewCell *cell = (UITableViewCell *)button.superview.superview;
NSMutableArray *tempArray = [[NSMutableArray alloc] init];
[tempArray addObject:[NSIndexPath indexPathForRow:favouritesArray.count inSection:0]];
[favouritesArray insertObject:cell.textLabel.text atIndex:favouritesArray.count];
[[self tableView] beginUpdates];
[[self tableView] insertRowsAtIndexPaths:(NSArray *)tempArray withRowAnimation:UITableViewRowAnimationFade];
[[self tableView] endUpdates];
}
EDIT
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(searching){
return [self.searchResults count];
}
else{
if ([[arrayForBool objectAtIndex:section] boolValue]) {
if(section == 0){
return favouritesArray.count;
}else{
NSString* key = [self.proCategoriesArray objectAtIndex:section - 1];
NSArray *aArray = [sectionContentDict valueForKey:key];
return aArray.count;
}
}
return 1;
}
}

Answer 1

You just should call the following:
[favouritesArray addObject:cell.textLabel.text];
[tableView reloadData];
Make sure you implemented this function:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
switch(section){
case 0:
return favouritesArray.count;
//Your other sections have to placed here, too
default:
return 0;
}
}
Then your tableView should update itself. The problem is that you insert whole cells, but you just have to insert data in your array. Hope it helps!

Answer 2

It seems like your data source is returning 0 as number of sections and rows. You are not correctly inserting/deleting rows, when you insert a new row, data source methods get called again, and if for instance you try to insert an object in a way that the row count will be 4, and data source tableView:numberOfRowsInSection: returns 3, you get an exception because you're trying yo add more objects that what data source promises.
When you try to update a table view all these data source methods get called again:
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
- (NSInteger) numberOfSectionsInTableView:(UITableView *)tableView;
- (UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath*) indexPath;
You must ensure that they return correct values. I suspect that you aren't even implementing them.
Edit
The problem is that you are just inserting a new object in favouritesArray, but this doesn't affect the number of rows returned by tableView:numberOfRowsInSection:. There you aren't returning favouritesArray.count, the exception is due to the fact that tableView:numberOfRowsInSection: returns a lower number than the rows that the table view should have.
In your case I think that you don't even need to call insertRowsAtIndexPaths:, you can do everything with your data source:
-(void)moveRowToFavourites:(id)sender {
UIButton *button = (UIButton *)sender;
UITableViewCell *cell = (UITableViewCell *)button.superview.superview;
[favouritesArray insertObject:cell.textLabel.text atIndex:favouritesArray.count];
[[self tableView]reloadData];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return favouritesArray.count;
}
In tableView:cellForRowAtIndexPath: you should return a cell that has an object fetched form favouritesArray as text.