Objective-C: Change UIImageView in Custom Cell change different cell images - ios

Question

I am using a custom cell on UITableView with multi Section and i’m added a UITapGestureRecognizer to a UIImageView for change it when the image is selected but When I select the image other's images in different cell are selected as well.
This is the code for the TableView datasource method cellForRowAtIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"FilterCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
UILabel *text = (UILabel *)[cell viewWithTag:ROW_TITLE];
UIImageView *image = (UIImageView *)[cell viewWithTag:ROW_IMAGE];
NSDictionary *item = [results objectAtIndex:indexPath.section];
NSString *string = [item objectForKey:JSONResp_common_name];
[text setText:((string != [NSNull null])? string : #"")];
if ([[item objectForKey:JSONResp_common_status] isEqualToNumber:[NSNumber numberWithBool:YES]])
[image setImage:[UIImage imageNamed:#"checked"]];
else
[image setImage:[UIImage imageNamed:#"unchecked"]];
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
[image setTag:indexPath.row];
[image setUserInteractionEnabled:YES]; action:#selector(handleTapFrom:)];
if([self tableView:tableView
canCollapseSection:indexPath.section]){ // EXPANDABLE ROW
if(!indexPath.row){// HEADER
// SET ACCESORIES
if([expandedSections containsIndex:indexPath.section])
[cell setAccessoryView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"menos"]]];
else
[cell setAccessoryView:[[UIImageView alloc] initWithImage:[UIImage imageNamed:#"mas"]]];
[image setUserInteractionEnabled:NO];
//Remove checked option from a cell
for(UITapGestureRecognizer *tapGesture in cell.gestureRecognizers)
[cell removeGestureRecognizer:tapGesture];
}else{// SUB ROWS
NSArray *subValues = [item objectForKey:PARAM_STRUCT_SUBELEMENTS];
NSDictionary *detail = [subValues objectAtIndex:indexPath.row -1];
//REASING VALUES TO SUB VALUES
if(detail && [detail isKindOfClass:[City class]]){
City *currentCity = (City *)detail;
[text setText:[currentCity name]];
}
[cell setAccessoryView:nil];
[tapGestureRecognizer setDelegate:self];
[cell addGestureRecognizer:tapGestureRecognizer];
}
}else{//ROWS CHECKED OPTION
[cell setAccessoryView:nil];
[tapGestureRecognizer setDelegate:self];
[cell addGestureRecognizer:tapGestureRecognizer];
}
return cell;
}
</code>
</pre>
This is the code for the TableView datasource method didSelectRowAtIndexPath:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSDictionary *data = [self.results objectAtIndex:indexPath.section];
if([self tableView:tableView
canCollapseSection:indexPath.section]){
if(!indexPath.row){// EXPANDABLE
// only first row toggles expandaed/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 = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"mas"]];
}else{
[tableView insertRowsAtIndexPaths:tmpArray
withRowAnimation:UITableViewRowAnimationTop];
cell.accessoryView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"menos"]];
}
}else{// Detail
}
}else{ // Normal Row
//[]
}}
This is the code for the TableView datasource method fro the UITapGestureRecognizer
- (void)handleTapFrom:(UITapGestureRecognizer *)recognizer {
UITableViewCell *cellView = (UITableViewCell *)[recognizer view];
UIImageView *switchImageView = nil;
for (UIView *item in [[[cellView subviews] firstObject] subviews]) {
if ([item isKindOfClass:[UIImageView class]] && ((UIImageView *)item).image != nil) {
switchImageView = (UIImageView *)item;
break;
}
}
if (switchImageView == nil) {
for (UIView *item in [[[[[cellView subviews] firstObject] subviews] objectAtIndex:1] subviews]) {
if ([item isKindOfClass:[UIImageView class]] && ((UIImageView *)item).image != nil) {
switchImageView = (UIImageView *)item;
break;
}
}
}
NSDictionary *item = [results objectAtIndex:switchImageView.tag];
if ([Utility image:switchImageView.image
isEqualTo:[UIImage imageNamed:IMAGE_UNCHECKED]]) {
if ([[item objectForKey:JSONResp_common_action] isEqualToString:JSONResp_sortings]) {
[delegate didCheckFilter:item
withStatus:YES];
} else if ([[item objectForKey:JSONResp_common_action] isEqualToString:JSONResp_filters]) {
[switchImageView setImage:[UIImage imageNamed:IMAGE_CHECKED]]; //change to a selected image
[delegate didCheckFilter:[item objectForKey:JSONResp_common_type]
withStatus:YES];
}
} else {
if ([[item objectForKey:JSONResp_common_action] isEqualToString:JSONResp_filters]) {
[switchImageView setImage:[UIImage imageNamed:IMAGE_UNCHECKED]];
[delegate didCheckFilter:[item objectForKey:JSONResp_common_type]
withStatus:NO];
}
}}

Answer 1

While declaring the UITapGestureRecognizer on particular cell assign the tag as
cell.tag = indexPath.row;
[cell addGestureRecognizer:tapGestureRecognizer];
and in your handler do like this
- (void)handleTapFrom:(UITapGestureRecognizer *)recognizer {
UITableViewCell *cellView = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:recognizer.tag inSection:0]];
// your stuff
}
Hope this Helps!