Question

I am trying to create a generic UITableView in my iPhone app.
I have a UITableView which populates the data using an array via a SELECT query loop.
I add the data into my array and populate the array in cellForRowAtIndexPath:.
I get the section header using that array and by using a sort method, I put the section headers in Array1.

I would like to have titleForHeaderInSection: work by having section 0 be a static header name and sections 1 and later become generic, meaning the header name will come from Array1.

I am not sure how can I create that logic since the app always throws EXC_BAD_ACCESS with the code below.

My logic: I keep the count of the array in an int and see if the value is greater than 0. If it is, I add the section header for and objectAtIndex:0, otherwise I use the static one. But when the count gets to 2, for section 2 and objectAtIndex:1, it breaks and throws EXC_BAD_ACCESS.

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    int value = [[self Array1] count];
    if(section == 0)
        return @"Countries";

    if (value > 0) {
        if (section == value){
        return [[self Array1] objectAtIndex:section - 1];
    }
    }   
}


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    int count = [[self Array1] count];
    return count + 1;
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section      
{
    int value = [[self Array1] count];
    if (section == 0) {
    return [self.Array count];
    }

    if (value > 0) {
        if (section == [[self Array1] count])  {
            NSString *initialLetter = [[self Array1] objectAtIndex:section - 1];

            // get the array of elements that begin with that letter
            NSArray *elementsWithInitialLetter = [self elementsWithInitialLetter:initialLetter];

            // return the count
            return [elementsWithInitialLetter count];
        }
    }

}

Answer 1

Looks like you’re just missing a retain on the iVar backing the Array1 method. declare the array as a property:

@property (nonatomic, retain) NSArray* datastore;

Then cache the value you’re referring to in the Array1 method in this method (probably in viewDidLoad).

self.datastore = [self Array1];

Then replace all remaining references to [self Array1] with self.datastore. Build run and see if it still crashes. (Don’t forget to set self.datastore = nil in your dealloc!