How to reset array in multiview iphone app - iphone

Question

I am trying to have a tableview that leads to another tableview whose list items depend on the first view. I have the database set up properly and my problem is that when I select one item on the first page and go to the second view for the first time it works fine but when I return to the first page and go back to the second view again the list still has the old values loaded with new ones. Is there a way to destroy the array and recreate it every time the second view is loaded? Where would I do this?
Here is where my array is initialized in the delegate:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self copyDatabaseIfNeeded];
organArray = [[NSMutableArray alloc] init];
procedureArray = [[NSMutableArray alloc] init];
[Organ getInitialDataToDisplay:[self getDBPath]];
[window addSubview:navigationController.view];
[window makeKeyAndVisible];
return YES;
}
Here is where the data is added to the array in my custom class:
+ (void) getDatabase:(NSString *)dbPath WithOrganID:(NSNumber *)organID
{
RadiologyAppAppDelegate *appDelegate = (RadiologyAppAppDelegate *)[[UIApplication sharedApplication] delegate];
if(sqlite3_open([dbPath UTF8String],&database) == SQLITE_OK){
const char *sql = "select * from Organ";
sqlite3_stmt *selectstmt;
if(sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL) == SQLITE_OK){
while (sqlite3_step(selectstmt) == SQLITE_ROW) {
NSInteger primaryKey = sqlite3_column_int(selectstmt, 0);
Procedure *procedureObj = [[Procedure alloc] initWithPrimaryKey:primaryKey];
procedureObj.procedureName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt,1)];
procedureObj.procedureID = sqlite3_column_int(selectstmt,0);
[appDelegate.procedureArray addObject: procedureObj];
[procedureObj release];
}
}
}
else
sqlite3_close(database);
}
Finally, here is my view controller:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
Procedure *procedureObj = [appDelegate.procedureArray objectAtIndex:indexPath.row];
PVCprocedureObj = appDelegate.procedureArray;
cell.textLabel.text = procedureObj.procedureName;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
Thanks for the help!

Answer 1

I would pass the data-object (data to be shown in the second table) to the 2nd controller. I think this is the easiest approach and you are not showing that part.
Pass the object when clicking the cell, inside: – tableView:didSelectRowAtIndexPath: and not when making the cell: -tableView:cellForRowAtIndexPath:
Hope this helps