Remove Rows From UITableView from Previous Selected Section - ios

Question

Currently I have a UITableView which is expands and collapses with the current code.
- (BOOL)tableView:(UITableView *)tableView canCollapseSection:(NSInteger)section{
if (section>=0) return YES;
return NO;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSInteger numberofRows = 0;
numberofRows = nameArray.count;
if (numberofRows != 0){
self.mainTableView.hidden = false;
}
return numberofRows;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if ([self tableView:tableView canCollapseSection:indexPath.section])
{
if (!indexPath.row)
{
// only first row toggles exapand/collapse
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSInteger section = indexPath.section;
BOOL currentlyExpanded = [expandedSections containsIndex:section];
NSInteger rows;
NSMutableArray *tmpArray = [NSMutableArray array];
if (currentlyExpanded)
{
rows = [self tableView:tableView numberOfRowsInSection:section];
[expandedSections removeIndex:section];
}
else
{
[expandedSections addIndex:section];
rows = [self tableView:tableView numberOfRowsInSection:section];
}
for (int i=1; i<rows; i++)
{
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:section];
[tmpArray addObject:tmpIndexPath];
}
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (currentlyExpanded)
{
[tableView deleteRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [ALCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:ALCustomColoredAccessoryTypeDown];
}
else
{
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [ALCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:ALCustomColoredAccessoryTypeUp];
}
}
else {
NSLog(#"Selected Section is %ld and subrow is %ld ",(long)indexPath.section ,(long)indexPath.row);
}
}
}
This works really well and upon selection of a UITableViews section the rows are expanded and populated with the correct data and when the same section is selected the rows are removed and appear collapsed.
However what i want to do is somehow automatically collapse the previous selected section and remove the rows within that previous section when the user selects a new indexpath.section.
I have tried storing the selected section index path to an array removing rows based on this value but I think I'm going about it the wrong way as I get assertion failures.
So my question is as follows :-
How can i automatically collapse (remove rows) from a uitableviews section upon selection of another section
Thanks for your help in advance
Thomas

Answer 1

i have faced this issue when i was writting code for my app and i founded this post that had no any single comment or answer...
You can use this code that i was written for me to colapse previous expanded rows of section when i clicked on other section and expand rows of that section, this code working for me try it...
`
- (BOOL)tableView:(UITableView *)tableView canCollapseSection:(NSInteger)section
{
if (section>=0) return YES;
return NO;
}
static NSInteger Value=0;
static NSInteger Value2=0;
static CFIndex indexPre=0;
static NSMutableArray *preArray;
static NSIndexPath *path;
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([self tableView:tableView canCollapseSection:indexPath.section])
{
if (!indexPath.row)
{
TableViewCell *cell = (TableViewCell *)[tableView cellForRowAtIndexPath:indexPath];
cell.hideButton.hidden=NO;
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSUInteger index=[expandedSections firstIndex];
if ([expandedSections indexGreaterThanIndex:index])
{
NSLog(#"%lu hhhwww", index);
}
NSInteger section = indexPath.section;
static NSInteger rows;
static NSInteger PreRows;
NSLog(#"%lu MY INDEXES1",(unsigned long)[expandedSections count]);
NSMutableArray *tmpArray = [NSMutableArray array];
preArray = [NSMutableArray array];
BOOL currentlyExpanded = [expandedSections containsIndex:section];
if (currentlyExpanded)
{
rows = [self tableView:tableView numberOfRowsInSection:section];
[expandedSections removeIndex:section];
Value=0;
Value2=0;
cell.hideButton.hidden=YES;
}
else
{
if (Value==0)
{
[expandedSections addIndex:section];
rows = [self tableView:tableView numberOfRowsInSection:section];
PreRows = [self tableView:tableView numberOfRowsInSection:section];
indexPre=indexPath.section;
Value=1;
}
else if (Value==1)
{
Value2=1;
NSLog(#"indexPre == %ld %# my indexxxxx", indexPre, expandedSections);
[expandedSections removeIndex:indexPre];
NSLog(#"indexPre == %ld %# my indexxxxx", indexPre, expandedSections);
[self.tableView reloadData];
[expandedSections addIndex:section];
NSLog(#"indexPre == %ld %# my indexxxxx", indexPre, expandedSections);
rows=[self tableView:tableView numberOfRowsInSection:section];
}
}
NSLog(#"%# MY INDEXES",expandedSections);
if (Value2==1)
{
for (int i=1; i<PreRows; i++)
{
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:indexPre];
[preArray addObject:tmpIndexPath];
}
NSLog(#"my arrray %#", preArray);
for (int i=1; i<rows; i++)
{
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:section];
[tmpArray addObject:tmpIndexPath];
}
NSLog(#"my arrray tmparray%#", preArray);
}
else
{
for (int i=1; i<rows; i++)
{
NSIndexPath *tmpIndexPath = [NSIndexPath indexPathForRow:i
inSection:section];
[tmpArray addObject:tmpIndexPath];
}
}
if (currentlyExpanded )
{
[tableView deleteRowsAtIndexPaths:tmpArray
withRowAnimation:NO];
cell.accessoryView = [DTCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:DTCustomColoredAccessoryTypeDown];
}
else if(Value==1)
{
if (Value2==1)
{
[tableView beginUpdates];
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:NO];
cell.accessoryView = [DTCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:DTCustomColoredAccessoryTypeUp];
[tableView endUpdates];
[tableView beginUpdates];
[tableView endUpdates];
indexPre=indexPath.section;
}
else
{
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [DTCustomColoredAccessory accessoryWithColor:[UIColor grayColor] type:DTCustomColoredAccessoryTypeUp];
}
}
}
}
}
`