Expansion of cell when cell is tapped - ios

Question

I am working with the tableview and working well with that. But i stuck at one place where i want to tap the cell and on the tap the cell should expand its height and and the cell below it should move down according to the expanded height.
The code which i am using is as follows.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
[cell.textLabel setNumberOfLines:0]; // unlimited number of lines
gratitude *grat = [gratitude_list objectAtIndex:indexPath.row];
cell.textLabel.text=grat.gratitude;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
[cell.textLabel setFont:[UIFont fontWithName:#"Lucida Sans" size:20]];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
gratindex > -1;
if (gratindex == indexPath.row) {
[self collapseSubItemsAtIndex:indexPath];
gratindex = -1;
}
else {
BOOL shouldCollapse = gratindex > -1;
if (shouldCollapse) {
[self collapseSubItemsAtIndex:gratindex];
}
gratindex = (shouldCollapse && indexPath.row > gratindex) ? indexPath.row - [[gratitude_list objectAtIndex:gratitude_list] count] : indexPath.row;
[self expandItemAtIndex:gratitude_list];
}
[self.gratitude_tableview endUpdates];
}
- (void)expandItemAtIndex:(int)index
{
NSMutableArray *indexPaths = [NSMutableArray new];
int insertPos = index + 1;
for (int i = 0; i < [gratitude_list count]; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:insertPos++ inSection:0]];
}
[self.gratitude_tableview insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.gratitude_tableview scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:index inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES];
}
- (void)collapseSubItemsAtIndex:(int)index {
NSMutableArray *indexPaths = [NSMutableArray new];
for (int i = index + 1; i <= index + [[gratitude_list objectAtIndex:index] count]; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:i inSection:0]];
}
[self.gratitude_tableview deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
}
Please help me out if i am using wrong approch please help me out.

Answer 1

Please check my answer. If you need any more detailing then you can ask me in comment.
UPDATED:
ANd in .h file
#interface tableViewDemoViewController : UITableViewController
{
NSIndexPath *selectedCellIndexPath;
BOOL clickedAgain;
int heights;
}
And in .m file
#import "tableViewDemoViewController.h"
#interface tableViewDemoViewController ()
#end
#implementation tableViewDemoViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
clickedAgain = YES;
heights =0;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return 15;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
cell.textLabel.text = [NSString stringWithFormat:#"This is cell %d",indexPath.row ];
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:NO];
if ([selectedCellIndexPath compare:indexPath] == NSOrderedSame && !clickedAgain)
{
heights =40;
clickedAgain =YES;
}
else
{
heights =80;
clickedAgain = NO;
}
[tableView beginUpdates];
selectedCellIndexPath = indexPath;
[tableView endUpdates];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if(selectedCellIndexPath != nil
&& [selectedCellIndexPath compare:indexPath] == NSOrderedSame )
{
return heights;
}
return 40;
} #end