How Do I Change a Table View Cell's Subtitle?

[JoeRCruso]

Hello. I have a problem that is making me go crazy. Everything I try doesn't work, and I'm not sure what I'm doing wrong. Basically, I'm trying to let the user change the subtitle in all of the table view cells. They just press a button and it would change them. So I tried to do this by setting the NSMutableArray to have different objects. I've tried addObject, replaceObjectAtIndex, and even removeAllObjects. None of them seem to have any effect. So... What should I try?

[BrianSlick]

You aren't really expecting a good answer from this, are you?

[JoeRCruso]

Originally Posted by BrianSlick

You aren't really expecting a good answer from this, are you?

I dunno. You want some sample code or something? I thought this was somewhat easy to understand. Could be wrong though.

[BrianSlick]

Need to know what you are doing in order to provide a correction.

[JoeRCruso]

Originally Posted by BrianSlick

Need to know what you are doing in order to provide a correction.

When the user taps a button, I want to change the all of the table view cells' subtitles. The table view only has 4 cells.

In the .h I have:

#import <UIKit/UIKit.h>

@interface MyViewController : UIViewController <UIActionSheetDelegate> {
    
    IBOutlet UINavigationController *mainNavCont;
    
    IBOutlet UITableView *tableView;
    NSMutableArray *data;
    NSMutableArray *subTitleData;
}

- (IBAction)button:(id)sender;

@end

In the .m, I have:

#import "MyViewController.h"

@implementation MyViewController

- (IBAction)button:(id)sender {
    [subTitleData removeObject:@"5 mins"];
    [subTitleData removeObject:@"10 mins"];
    [subTitleData removeObject:@"15 mins"];
    [subTitleData removeObject:@"20 mins"];
    [subTitleData addObject:@"10 mins"];
    [subTitleData addObject:@"15 mins"];
    [subTitleData addObject:@"20 mins"];
    [subTitleData addObject:@"25 mins"];
    [tableView reloadData];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
        return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
        return [data count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        static NSString *cellID = @"Cell";
        
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
        if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"Cell"] autorelease];
        }
        cell.textLabel.text = [data objectAtIndex:indexPath.row];
        cell.detailTextLabel.text = [subTitleData objectAtIndex:indexPath.row];
        
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        
        return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
        [tableView deselectRowAtIndexPath:indexPath animated:YES];
        
        if (indexPath.row == 0) {
           //haven't gotten to these yet
        }
        if (indexPath.row == 1) {
            
        }
        if (indexPath.row == 2) {
            
        }
        if (indexPath.row == 3) {
            
        }
    }

- (void)dealloc {
    [mainNavCont release];
    [tableView release];
    [super dealloc];
}

- (void)viewDidLoad {
    [super viewDidLoad];
        
    data = [[NSMutableArray alloc] initWithObjects:@"First", @"Second", @"Third", @"Fourth", nil];
    subTitleData = [[NSMutableArray alloc] initWithObjects:@"5 mins", @"10 mins", @"15 mins", @"20 mins", nil];
}

- (void)viewDidUnload {
    [mainNavCont release];
    mainNavCont = nil;
    [tableView release];
    tableView = nil;
    [super viewDidUnload];
}

@end

Not sure what I'm doing wrong. The subtitles don't change when I tap the button.

[Domele]

Put an NSLog in the method to make sure it's firing and check the connection on your tableview outlet.

[BrianSlick]

Also (probably not related), having a navigation controller in your view controller is probably the wrong thing to be doing.

Since this isn't the best way to set up your data, you should perhaps consider replacing the objects, rather than removing-and-then-adding.

[JoeRCruso]

Originally Posted by BrianSlick

Also (probably not related), having a navigation controller in your view controller is probably the wrong thing to be doing.

Since this isn't the best way to set up your data, you should perhaps consider replacing the objects, rather than removing-and-then-adding.

I have tried replacing them using replaceObjectAtIndex, but I cannot use indexPath as the index. I tried just throwing a random number (0) in there, and that didn't work either.

[JoeRCruso]

Originally Posted by Domele

Put an NSLog in the method to make sure it's firing and check the connection on your tableview outlet.

I have used NSLog and it is firing. I just check the connection and it's connected too.

[Domele]

Put this at the end of your IBAction method:

NSLog(@"%@", subTitleData);

and paste the result here.

[JoeRCruso]

Originally Posted by Domele

Put this at the end of your IBAction method:

NSLog(@"%@", subTitleData);

and paste the result here.

I figured out the issue. It was a simple typo. I spelt subTitleData wrong. I copied it correct though haha. Sorry for wasting your time :/

[Domele]

Wouldn't that cause a compiler error that would say something like undefined pointer?

[BrianSlick]

Originally Posted by JoeRCruso

I have tried replacing them using replaceObjectAtIndex, but I cannot use indexPath as the index. I tried just throwing a random number (0) in there, and that didn't work either.

You only have 1 section, so use the row as the index.