Need help on update and delete sqlite on the tableview - xcode

Question

I'm a beginner on xcode and I have very little knowledge about it. Here is my code. I'm doing a simple account management program for iOS 6.0. I need to select the row from where i'm going to edit/delete my data from the table view and then be able to update/delete it. I don't know how to code those and I need help from experienced programmers.
My project: http://www.mediafire.com/?95l8pwzu3c62ts0
#import "FlipsideViewController.h"
#interface FlipsideViewController ()
#end
#implementation FlipsideViewController
#synthesize entries;
- (void)viewDidLoad
{
self.label.text=self.strUsername;
entries = [[NSMutableArray alloc]init];
[self openDB];
NSString *sql = [NSString stringWithFormat:#"SELECT * FROM SUMMARY8 WHERE theuser = '%s'",[self.label.text UTF8String]];
sqlite3_stmt *statement;
if (sqlite3_prepare(account, [sql UTF8String], -1, &statement, nil)==SQLITE_OK)
{
while (sqlite3_step(statement)==SQLITE_ROW){
char *field1=(char *) sqlite3_column_text(statement, 0 );
NSString *field1Str = [[NSString alloc]initWithUTF8String:field1];
char *field2=(char *) sqlite3_column_text(statement, 1 );
NSString *field2Str = [[NSString alloc]initWithUTF8String:field2];
char *field3=(char *) sqlite3_column_text(statement, 2 );
NSString *field3Str = [[NSString alloc]initWithUTF8String:field3];
char *field4=(char *) sqlite3_column_text(statement, 3 );
NSString *field4Str = [[NSString alloc]initWithUTF8String:field4];
NSString *str = [[NSString alloc]initWithFormat:#"%# - %# - %#", field1Str,field3Str,field4Str];
[entries addObject:str];
}
}
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSString *) filePath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [[paths objectAtIndex:0]stringByAppendingPathComponent:#"account.sql"];
}
-(void) openDB
{
if (sqlite3_open([[self filePath] UTF8String], &account) !=SQLITE_OK){
sqlite3_close(account);
NSAssert(0,#"Database failed to open");
}
else
{
NSLog(#"database opened");
}
}
- (IBAction)addaccount:(id)sender {
MainViewController *FVC = [self.storyboard instantiateViewControllerWithIdentifier:#"MainViewController"];
FVC.strUsername=self.strUsername;
[self presentViewController:FVC animated:YES completion:nil];
// FVC.label.text=self.label.text;
}
- (IBAction)btnEdit:(id)sender {
}
- (IBAction)btnDelete:(id)sender {
[self tableView:<#(UITableView *)#> cellForRowAtIndexPath:<#(NSIndexPath *)#>];
}
#pragma mark - Actions
- (IBAction)done:(id)sender
{
[self.delegate flipsideViewControllerDidFinish:self];
}
-(NSInteger) numberOfSectionsInTableView: (UITableView *)tableView
{
return 1;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *myTitle = [[NSString alloc]initWithFormat:#"Name - Username - Password"];
return myTitle;
}
-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(#"%d", [entries count]);
return [entries count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{//NSLog(#"test");
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
cell.textLabel.text = [self.entries objectAtIndex:indexPath.row];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *selectedRow = [entries objectAtIndex:indexPath.row];
NSString *sql = [NSString stringWithFormat:#"DELETE FROM SUMMARY8 WHERE name = '%#'",selectedRow];
char *err;
if (sqlite3_exec(account, [sql UTF8String], NULL, NULL, &err)!=SQLITE_OK){
sqlite3_close(account);
NSAssert(0, #"Could not delete row");
}
else {
NSLog(#"row deleted");
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Done" message:#"Account was deleted successfully!" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
}
}
#end
is this correct? sorry I absolutely have no background on Xcode. So sorry for the bother..

Answer 1

Delete use this:
Example:strUpdate = [NSString stringWithFormat:#"DELETE FROM SUMMARY8 WHERE theuser = '%s'",[self.label.text UTF8String]];
Update use this:
Example(updating the status):strQuery = [NSString stringWithFormat:#"UPDATE SUMMARY8 SET STATUS='1' WHERE theuser = '%s'",[self.label.text UTF8String]];
Hope this helps.
EDIT:
use this method:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
Example: NSString *selectedRow = [entries objectAtIndex:indexPath.row];
}
This method basically shows the data for that row of table. manipulate with that data. Given examples.. Tweak it according to your situation...
EDIT 2:
For example:
UITableView *table = [[UITableView alloc] init];
[self tableView:table didSelectRowAtIndexPath:index];
where index is your item number.