Change image inside of a single UITableViewCell when button tapped in DetailViewController - ios

Question

In my detail view controller (DetailViewController.m), a notification to change an image in a UITableViewCell type is fired. I have two types of UITableViewCells. That said, when acceptButton or declineButton is tapped, I ONLY want the image to change in 1 specific cell (specifically, an image in the tapped cell that opens the detail view - not in all cells of that type). How might I go about doing this? Here's my code so far:
DetailViewController.m
- (IBAction)acceptButton:(id)sender {
if (!checked1) {
[self.acceptCheck setImage:[UIImage imageNamed:#"checkedgreen.png"] forState:UIControlStateNormal];
checked1 = YES;
[[NSNotificationCenter defaultCenter] postNotificationName:#"ImageChangeNotification" object:nil];
AcceptedViewController *detailViewController = [[AcceptedViewController alloc]
initWithNibName:#"AcceptedViewController" bundle:nil];
[self presentViewController:detailViewController animated:YES completion:nil];
}
else if (checked1) {
[self.acceptCheck setImage:[UIImage imageNamed:#"uncheckedgray.png"] forState:UIControlStateNormal];
checked1 = NO;
}
}
- (IBAction)declineButton:(id)sender {
if (!checked2) {
[self.declineCheck setImage:[UIImage imageNamed:#"declinered.png"] forState:UIControlStateNormal];
checked2 = YES;
[[NSNotificationCenter defaultCenter] postNotificationName:#"Declined" object:nil];
DeniedViewController *detailViewController = [[DeniedViewController alloc]
initWithNibName:#"DeniedViewController" bundle:nil];
[self presentViewController:detailViewController animated:YES completion:nil];
}
else if (checked2) {
[self.declineCheck setImage:[UIImage imageNamed:#"declinegray.png"] forState:UIControlStateNormal];
checked2 = NO;
}
}
TableViewCellB.m
- (void)awakeFromNib {
[super awakeFromNib];
// Initialization code
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(changeImage)
name:#"ImageChangeNotification"
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(declineImage)
name:#"Declined"
object:nil];
}
-(void)changeImage
{
[self.displayedBar setImage:[UIImage imageNamed:#"greenbar.png"]];
self.Title.text = #"Accepted!";
}
-(void)declineImage
{
[self.displayedBar setImage:[UIImage imageNamed:#"redbar.png"]];
self.Title.text = #"Declined!";
}
TableViewController.m (incase it's needed)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *data = self.messages[indexPath.row];
id swaptime = data[#"swaptime"];
if ([swaptime isKindOfClass:[NSString class]]) {
static NSString *ChatTableIdentifier2 = #"SwapDetailTableViewCell";
SwapDetailTableViewCell *cell = (SwapDetailTableViewCell *)[tableView dequeueReusableCellWithIdentifier:ChatTableIdentifier2 forIndexPath:indexPath];
NSString *time = data[#"swaptime"];
cell.startTime.text = time;
NSString *timeEnd = data[#"endswaptime"];
cell.endTime.text = timeEnd;
NSString *costofSwap = data[#"swapvalue"];
cell.swapValue.text = costofSwap;
return cell;
} else {
static NSString *ChatTableIdentifier = #"ChatTableViewCell";
ChatTableViewCell *cell = (ChatTableViewCell *)[tableView dequeueReusableCellWithIdentifier:ChatTableIdentifier forIndexPath:indexPath];
NSString *userName = data[#"name"];
cell.sendingUser.text = userName;
NSString *messageBody = data[#"body"];
cell.messageDisplayed.text = messageBody;
NSString *timeReceived = data[#"published at"];
cell.timeStamp.text = timeReceived;
NSString *userInfo = [self.userid objectForKey:#"name"];
if ([cell.sendingUser.text isEqual: userInfo]) {
cell.messageDisplayed.textAlignment = NSTextAlignmentLeft;
cell.sendingUser.textAlignment = NSTextAlignmentLeft;
[cell.chatBubble setImage:[UIImage imageNamed:#"bubblegrey2.png"]];
} else {
cell.messageDisplayed.textAlignment = NSTextAlignmentRight;
cell.sendingUser.textAlignment = NSTextAlignmentRight;
[cell.chatBubble setImage:[UIImage imageNamed:#"bubbleorange2.png"]];
}
return cell;
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *data = self.messages[indexPath.row];
id swaptime = data[#"swaptime"];
if ([swaptime isKindOfClass:[NSString class]]) {
SwapDetailsViewController *detailViewController = [[SwapDetailsViewController alloc]
initWithNibName:#"SwapDetailsViewController" bundle:nil];
detailViewController.indexPath = [self.tableView indexPathForSelectedRow];
detailViewController.delegate = self;
detailViewController.swapDetails = [self.messages objectAtIndex:indexPath.row];
[self presentViewController:detailViewController animated:YES completion:nil];
} else {
}
}

Answer 1

#interface DetailViewController ()
{
UIImage *_yourImage;
}
Then change it how u need it in declineButton or acceptButton and do [tableView reloadData].

Answer 2

In DetailViewController.h create protocol and create a property of it as below.
#protocol DetailViewControllerDelegate <NSObject>
- (void)acceptButton:(BOOL)accepted withIndexPath:(NSIndexPath*)indexPath;
#end
#interface DetailViewController : UIViewController
#property (strong, nonatomic) NSIndexPath *indexPath;
#property (weak, nonatomic) id<DetailViewControllerDelegate> delegate;
// other properites and methods ....
#end
IN MasterViewController
While pushing detailViewController pass the indexpath and set the delegete to self and confirm, implement delegate method, as below
#interface MasterViewController () <DetailViewControllerDelegate>
// other properties....
#end
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:#"showDetail"]) {
DetailViewController *controller = (DetailViewController *)[[segue destinationViewController] topViewController];
controller.indexPath = [self.tableView indexPathForSelectedRow];
controller.delegate = self;
// Other code...
}
}
- (void)acceptButton:(BOOL)accepted withIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:indexPath];
if (accepted) {
// do accepted stuff
} else {
// do decline stuff
}
}
IN DetailViewController.m
Implement the accept and decline button action
- (IBAction)acceptButton:(id)sender {
if (!checked1) {
[self.acceptCheck setImage:[UIImage imageNamed:#"checkedgreen.png"] forState:UIControlStateNormal];
checked1 = YES;
/// calling delegate method
[self.delegate acceptButton:YES withIndexPath:self.indexPath];
AcceptedViewController *detailViewController = [[AcceptedViewController alloc]
initWithNibName:#"AcceptedViewController" bundle:nil];
[self presentViewController:detailViewController animated:YES completion:nil];
} else if (checked1) {
[self.acceptCheck setImage:[UIImage imageNamed:#"uncheckedgray.png"] forState:UIControlStateNormal];
checked1 = NO;
}
}
- (IBAction)declineButton:(id)sender {
if (!checked2) {
[self.declineCheck setImage:[UIImage imageNamed:#"declinered.png"] forState:UIControlStateNormal];
checked2 = YES;
/// calling delegate method
[self.delegate acceptButton:NO withIndexPath:self.indexPath];
DeniedViewController *detailViewController = [[DeniedViewController alloc]
initWithNibName:#"DeniedViewController" bundle:nil];
[self presentViewController:detailViewController animated:YES completion:nil];
} else if (checked2) {
[self.declineCheck setImage:[UIImage imageNamed:#"declinegray.png"] forState:UIControlStateNormal];
checked2 = NO;
}
}