Insert rows in sqlite database - ios

Question

I have a sqlite db and i want to insert row in it . I used this code for inserting rows and make a query.
-(void)InsertRecords{
querySQL1 = #"select category from notes where id=5";
const char * query_stmt = [querySQL1 UTF8String];
sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL);
NSString *insertSQL = [NSString stringWithFormat:
#"INSERT INTO notes (id, title, content,dataAdd,category) VALUES (\"%#\", \"%#\", \"%#\" ,\"%#\",\"%#\")",
#"5",
#"georgiana",
#"20",
#"12.09.2019",
#"public"];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_stmt *updateStmt = nil;
sqlite3_prepare_v2(contactDB, insert_stmt, -1, &statement, NULL);
if(sqlite3_prepare_v2(contactDB, insert_stmt, -1, &statement, NULL) == SQLITE_OK){
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(#"data inserted");
}
else{
NSLog(#"Error while creating update statement. '%s'", sqlite3_errmsg(contactDB));
}
}
else
NSLog(#"Error while creating update statement. '%s'", sqlite3_errmsg(contactDB));
querySQL1 = #"select id from notes where category LIKE 'public'";
query_stmt = [querySQL1 UTF8String];
sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL);
NSString *idNr=#"";
while (sqlite3_step(statement) == SQLITE_ROW)
{
idNr =[NSString stringWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
}
NSLog(#"%#",idNr);
sqlite3_finalize(statement);
sqlite3_close(contactDB);
}
Everything is ok, but when I open the app again, I don't find any value for idNr.
Any useful help will be appreciated.

Answer 1

The NSString allocation is wrong statement, There is no need to alloc NSString object here.
The method stringWithUTF8String: is class method. This will do the allocation for NSString.
Replace your code like below:
NSString *idNr = #"";
while (sqlite3_step(statement) == SQLITE_ROW) {
idNr = [NSString stringWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
}