如何将indexPath.row绑定到iphone sqlite中的主键

- (void)updateStatus:(id)sender { // called when a user presses the button to alter the status

NSIndexPath *indexPath = [self.tableView indexPathForCell:(UITableViewCell *)[sender superview]];
NSLog(@\"The row id is %d\",  indexPath.row); // This works

todoAppDelegate *appDelegate = (todoAppDelegate *)[[UIApplication sharedApplication] delegate];
Todo *td = [appDelegate.todos objectAtIndex:indexPath.row];

self.selectedIndexPath = indexPath;
NSLog(@\"Selected index path is %i\", self.selectedIndexPath); 

if (td.status == 0) {       
    [td updateStatus:1];
    NSLog(@\"Status is %i\",td.status);
}
else {
    [td updateStatus:0];
    NSLog(@\"Status is %i\",td.status);
}

[appDelegate.todos makeObjectsPerformSelector:@selector(dehydrate)];
} 

- (void) dehydrate {
if (dirty) { // If the todo is “dirty” meaning the dirty property was set to YES, we will need to save the new data to the database.
if (dehydrate_statment == nil) {
    const char *sql = \"update todo set complete = ? where pk= ?\"; // PK needs to correspond to indexpath in RootViewController

    if (sqlite3_prepare_v2(database, sql, -1, &dehydrate_statment, NULL) != SQLITE_OK) {
        NSAssert1(0, @\"Error: failed to prepare statement with message \'%s\'.\", sqlite3_errmsg(database));
    }
}

sqlite3_bind_int(dehydrate_statment, 2, self.primaryKey);
sqlite3_bind_int(dehydrate_statment, 1, self.status);
int success = sqlite3_step(dehydrate_statment);

if (success != SQLITE_DONE) {
    NSAssert1(0, @\"Error: failed to save priority with message \'%s\'.\", sqlite3_errmsg(database));
}
sqlite3_reset(dehydrate_statment);
dirty = NO;
NSLog(@\"Dehydrate called\");
}       
}