Question

I have made a table containing an array editable (you can delete rows) by swiping and clicking delete. However, I am trying to make it so you click the edit button in the navbar and the red minus sign comes up next to each cell.

I am using the code from my book but the tableView variable is not working. I can’t figure out how it is working in the book but not in my project.

I think it is because the book’s class is a subclass of UITableViewController while mine is a UIViewController with a UITableViewController Object in it. So how can I get this to work?

I have an IBOutlet for tableView in my interface file too.

Here is the relevant code:

#import "RoutineTableViewController.h"
#import "AlertPrompt.h"

@implementation RoutineTableViewController

@synthesize myArray;
@synthesize myData;

- (void)viewDidLoad
{
    myArray = [[NSMutableArray alloc] init]; 
    myData = [[NSMutableArray arrayWithContentsOfFile:@"mydata"] retain]; 

    if (myData == nil)
    {
        myData = [NSMutableArray array];  
    }

    UIBarButtonItem * addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(showPrompt)];
    [self.navigationItem setLeftBarButtonItem:addButton];
    [addButton release];

    UIBarButtonItem *editButton = [[UIBarButtonItem alloc]initWithTitle:@"Edit" style:UIBarButtonItemStyleBordered target:self action:@selector(toggleEdit)];
    self.navigationItem.rightBarButtonItem = editButton;
    [editButton release];

    [super viewDidLoad];
}

-(IBAction)toggleEdit:(id)sender
{
    [self.tableView setEditing: !=self.tableView.editing animated:YES];

    if (self.tableView.editing)
        [self.navigationItem.rightBarButtonItem setTitle:@"Done"];
    else
        [self.navigationItem.rightBarButtonItem setTitle:@"Edit"];
}

Answer 1

This might look like I am assuming you are a total newbie, but trust me, many people forget this (I’m not saying I’m an expert either), but you should check if your edit button is connected to the corresponding IBOutlet in Interface Builder.

EDIT: Forgot to ask, is your button an IBOutlet (IB element)? Or is it created programmatically? If the second is true, then you should NOT use IBActions for programmatically created objects (hence Interface Builder Action = IBAction)