Hide unhide UITableViewCell background - ios

Question

I have UITableView in which i want to add Background image on first cell in viewDidLoad method, after adding image on first cell, when user selects any other row i want to hide my background image.
Is it possible to do ?
Please help and thanks in advance.
Edit:
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath*)indexPath{
if(indexPath.row==0){
cell.backgroundView = [ [UIImageView alloc] initWithImage:[[UIImage imageNamed:#"active-tab.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
flag=true;
NSLog(#"willDisplayCell");
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (flag==true) {
cell.backgroundView = nil; //How to get `cell` here ?
//How to remove BGImage from first cell ???
}
}

Answer 1

Take a look at this question and the second answer gives a great description.
In short you should not be using the viewDiLoad callback but instead the
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { ... }
From here you can customise each cell's background as you wish, just reload the row when the user clicks.
How to customize the background color of a UITableViewCell?
EDIT
Now because you added your code I can clearly see the problem:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"BTSTicketsCellIdentifier";
CRHomeCategCell *cell = (CRHomeCategCell *)[_tblCateg dequeueReusableCellWithIdentifier:CellIdentifier];
cell.backgroundView = nil;
}
This does not do what you think it does. dequeueReusableCellWithIdentifier:CellIdentifier gives you a NEW instance of a cell based off the one identified by the identifier.
You are not getting a reference to the row here, you are creating a new row and settings its background to nil.
Your code should be something more like this:
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath*)indexPath{
if(indexPath.row==0){
if(cell.backgroundView == nil)
{
cell.backgroundView = [ [UIImageView alloc] initWithImage:[ [UIImage imageNamed:#"active-tab.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
NSLog(#"willDisplayCell");
}
else
{
cell.backgroundView = nil;
NSLog(#"willHideCell");
}
}
}
This is not a great solution, I personally would do something more like having this custom cell hold a boolean and switch its state and check that. But this is up to you to develop, this is the general idea of how it should work.
EDIT 2:
Since you are determined to run it inside didSelectRowAtIndexPath and also completely incapable of doing any level of research or putting any effort into your work might I suggest the method:
tableView cellForRowAtIndexPath:<#(NSIndexPath *)#>

Answer 2

it works add table view delegates in your class
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath
*)indexPath
{
if((indexPath.row)==0) {
cell.backgroundView = [ [UIImageView alloc] initWithImage:[ [UIImage imageNamed:#"normal.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
yourcustomcell *cell = [tableView cellForRowAtIndexPath:indexPath];
cell.backgroundView = [ [UIImageView alloc] initWithImage:[ [UIImage imageNamed:#"pressed.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
or
cell.backgroundView = nil;
[tableview reloadData];
}