change cell content view when custome view added to cell - iphone

Question

I have created one uiviewcontroller with xib to adding in the uitableview cell. here is the code for that.
#interface CustomeCellHome : UIViewController{
IBOutlet UIImageView *imgViewBack;
// will have number of labels and imageviews.
}
#property (nonatomic, retain) UIImageView *imgViewBack;
#implementation CustomeCellHome
#synthesize imgViewBack;
all this IBOutlet connected to xib.
now i am adding this to my uitableview cell. here is code for that.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 150;
}
- (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] autorelease];
// }
CustomeCellHome *objCell = [[CustomeCellHome alloc] init];
[objCell.view setTag:indexPath.row];
[cell.contentView addSubview:objCell.view];
objCell.imgViewBack.image = [UIImage imageNamed:#"unsel.png"];
[objCell release];
return cell;
}
now i want to change this imgViewBack image on selection of row. here is code for that.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
CustomeCellHome *objCCell = [[CustomeCellHome alloc] init];
objCCell.view = [cell viewWithTag:indexPath.row];
objCCell.imgViewBack.image = [UIImage imageNamed:#"sel.png"];
}
but my imgViewBack is not changing its image. don't getting what is wrong with this. any suggestion for that ? any suggestion will be appreciated .

Answer 1

If you must use a viewController like u do (again probably this is not what u need), I can see few problems with your code.
1) Instead of [objCell.view setTag:indexPath.row]; use [objCell.view setTag:indexPath.row+1]; otherwise u will have a problem when indexPath.row=0 (I think 0 is also the tag of the superview).
2) Don't release the viewController, if u need one keep it around.
(but u will need to save it in some data structure so later u can release it...)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CellIdentifier";
UITableViewCell *cell = nil;
// u will have problems reusing those cells...
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// if(cell == nil)
// {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
CustomeCellHome *objCell = [[CustomeCellHome alloc] init];
[objCell.view setTag:indexPath.row+1];
[cell.contentView addSubview:objCell.view];
objCell.imgViewBack.image = [UIImage imageNamed:#"image1.png"];
//[objCell release]; // don't release now, add it to some data structure so u can release later
// }
return cell;
}
2) Then in didSelectRowAtIndexPath retrieve the cell's viewController and change his imgViewBack property.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// get the cell
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
// get the cell's viewController
UIView *aView = [cell.contentView viewWithTag:indexPath.row+1];
CustomeCellHome *objCCell = (CustomeCellHome *)[aView nextResponder];
// update the image
objCCell.imgViewBack.image = [UIImage imageNamed:#"image2.png"];
}
This will change the image, but this is not a perfect solution, u will have problems if u r reusing cells... Try rethink if u really need to use the viewController.