Update field value of Sqlite database using Xcode - sqlite

Question

I have an application with a save button. When I click on the save button, the application should automatically update the value of a row and set it to YES.
Till now I have the following code, but it isn't actually working. Keep in mind, my application is a tab menu application. In the first view I have the table cells, and on click I go to another view controller, a details view controller, where the button is present.
When I click on the button, the value of 'Fav' field in the database should change from NO to YES.
This is my code:
- (IBAction)AddButClick:(UIButton *)sender {
[AddBut setImage:[UIImage imageNamed:#"apple-logo copy.png"] forState:UIControlStateSelected];
[AddBut setImage:[UIImage imageNamed:#"apple-logo copy.png"] forState:UIControlStateHighlighted];
Favo = [[NSMutableArray alloc] initWithCapacity:1000000];
// NSLog(authorNAme);
#try {
NSFileManager *fileMgr = [NSFileManager defaultManager];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:#"dictionary.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:#"authorsDb2.sqlite"];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:#"FinalDb.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:#"xxJuridique-FINAL-OK.sqlite"];
NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:#"data.sqlite"];
BOOL success = [fileMgr fileExistsAtPath:dbPath];
if(!success)
{
NSLog(#"Cannot locate database file '%#'.", dbPath);
}
if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
{
NSLog(#"An error has occured: %#", sqlite3_errmsg(db));
}
sqlite3_stmt *compiled_statement1;
if(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK) {
//const char *sqlStatement =
NSString *formatedSql = [NSString stringWithFormat:#"UPDATE Sheet1 SET Fav = 'YES' WHERE field3 = '%#' " , authorNAme2];
NSLog(#"This is the query %#",formatedSql);
const char *sql = [formatedSql UTF8String];
NSLog(#" !!!!!!!! In the middle of it !!!!!!!!!!!!");
if (sqlite3_prepare_v2(db, sql, -1, &compiled_statement1, NULL) != SQLITE_OK) {
NSLog(#"!!!!!!!!!!!!!!!!!!!ERRRRROOOOOOORRRRRRRRR!!!!!!!!!!!!!!!!!!!!!!!!!");
NSAssert1(0, #"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(db));
}
// sqlite3_exec(db, [compiled_statement1 UTF8String], NULL, NULL, NULL);
//sqlite3_bind_text(compiled_statement1, 1, [formatedSql UTF8String], -1, SQLITE_TRANSIENT);
int success = sqlite3_step(compiled_statement1);
sqlite3_reset(compiled_statement1);
if (success != SQLITE_ERROR) {
NSLog(#"Successfully inserted");
sqlite3_last_insert_rowid(db);
}
sqlite3_finalize(compiled_statement1);
}
//
// BOOL success = [fileMgr fileExistsAtPath:dbPath];
//
// if(!success)
// {
// NSLog(#"Cannot locate database file '%#'.", dbPath);
// }
// if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
// {
// NSLog(#"An error has occured: %#", sqlite3_errmsg(db));
//
// }
// const char *sql = "SELECT F_Keyword FROM wordss";
const char *sql = "SELECT * FROM Sheet1";
NSLog(#"Successfully selected from database");
sqlite3_stmt *sqlStatement;
if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
{
NSLog(#"Problem with prepare statement: %#", sqlite3_errmsg(db));
}else{
NSLog(#"Got in the else tag");
while (sqlite3_step(sqlStatement)==SQLITE_ROW /*&& PAss == NO*/) {
NSLog(#"Got in the while tag");
Author * author = [[Author alloc] init];
NSLog(#"Author initialized");
author.name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,10)];
NSLog(#"Initialization ok");
// NSLog(author.name);
if(/*author.name == #"NO" &&*/ HighLighted == NO){
//const char *sql2 = "INSERT INTO Sheet1 ";
[AddBut setImage:[UIImage imageNamed:#"apple-logo copy.png"] forState:UIControlStateNormal];
NSLog(#"We have not selected it as fav yet");
// [AddBut setSelected:NO]; //btn changes to normal state
NSLog(#"The button was NOt highlighted and now is");
HighLighted = YES;
// PAss = YES;
// [self release];
break;
}
else
{
NSLog(#"We have selected it as fav");
[AddBut setImage:[UIImage imageNamed:#"apple-logo.png"] forState:UIControlStateNormal];
[AddBut setSelected:NO]; //btn changes to normal state
NSLog(#"The button was highlighted and now is NOt");
HighLighted = NO;
break;
// [self viewDidLoad];
// PAss = YES;
}
// [Favo release];
// NSLog(Favo);
// author.name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
// author.title = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
// author.genre = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement, 4)];
// [theauthors addObject:author];
}
}
}
#catch (NSException *exception) {
NSLog(#"Problem with prepare statement: %#", sqlite3_errmsg(db));
}
#finally {
// sqlite3_finalize(sqlStatement);
sqlite3_close(db);
return Favo;
}

Answer 1

The problem was not in the add but click, it was actually in the viewWillAppear, in which i should have done :
[self authorList2];
[self.tableView reloadData] ;
In order to load the mutable array and then reload data