create sqlite db programmatically in iphone sdk - iphone

Question

hai i a'm trying to create a sqlite database programmatically at the run time. can anybody say how to create it in iphone sdk.

Answer 1

Just call the sqlite3_open function it will create a database if no database exist on the path.
// generate databasePath programmatically
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK)
{
// your code here
}
post a comment if you need more code example on this

Answer 2

-(void)viewDidLoad
{
[super viewDidLoad];
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"contacts.sqlite"]];
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: databasePath ] == NO)
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
char *errMsg;
const char *sql_stmt = "CREATE TABLE IF NOT EXISTS CONTACTS (ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT, ADDRESS TEXT, PHONE TEXT)";
if (sqlite3_exec(contactDB, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
{
NSLog(#"if");
}
sqlite3_close(contactDB);
} else
{
NSLog(#"else");
}
}
[filemgr release];
}
-(IBAction)table
{
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"contacts.sqlite"]];
NSFileManager *filemgr = [NSFileManager defaultManager];
// if ([filemgr fileExistsAtPath: databasePath ] == NO)
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
char *errMsg;
const char *sql_stmt = "CREATE TABLE LIST (ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT, ADDRESS TEXT, PHONE TEXT)";
if (sqlite3_exec(contactDB, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
{
NSLog(#"tables failed");
// status.text = #"Failed to create table";
}
sqlite3_close(contactDB);
}
else
{
NSLog(#"tables failed");
//status.text = #"Failed to open/create database";
}
}
[filemgr release];
}

Answer 3

import in .m file #import sqlite3.h and add framework in ur project libsqlite3.0.dylib
firstly create NSObject class and named it Database.
in .h class
#interface database : NSObject
{
NSString *databasePath;
NSString *databaseName;
sqlite3 *myDatabase;
NSArray *documentPaths;
NSString *documentsDir;
}
//---initial methods-------
-(void)createDatabaseIfNeeded;
//-----------------path find method---------------------//
-(void)pathFind;
//-----------------write value----------------------//
-(void)writeValueInSettings:(NSMutableArray *)arrayvalue;
//-------------------fetch value from setting table------------//
-(NSMutableArray *)fetchValue;
//-------------------update value---------------------//
-(void)updateSetting:(NSArray *)arr;
.m class write
-(id)init
{
if((self=[super init]))
{
[self createDatabaseIfNeeded];
}
return self;
}
//-----------create database if needed method--------------//
-(void)createDatabaseIfNeeded
{
[self pathFind];
BOOL success;
NSFileManager *filemgr = [NSFileManager defaultManager];
success=[filemgr fileExistsAtPath:databasePath];
if (success)return;
NSLog(#"not success");
//Get the path to the database in the application package
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];
// Copy the database from the package to the users filesystem
[filemgr copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
}
//----------------path find-----------------//
-(void)pathFind
{
databaseName = #"accDataBase.DB";
// Get the path to the documents directory and append the databaseName
documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
documentsDir = [documentPaths objectAtIndex:0];
databasePath = [documentsDir stringByAppendingPathComponent:databaseName];
}
//------------------write value in setting----------------//
-(void)writeValueInSettings:(NSMutableArray *)arrayvalue
{
NSLog(#"%#",arrayvalue);
if(sqlite3_open([databasePath UTF8String],&myDatabase)==SQLITE_OK)
{
database *objectDatabase=[[database alloc]init];
NSString *stringvalue2=[objectDatabase countValue];
[objectDatabase release];
int intvalue1=[stringvalue2 intValue];
intvalue1=intvalue1+1;
NSLog(#"opened");
NSString *sql1;
sql1=[[NSString alloc] initWithFormat:#"insert into setting values('%i','%i','%i','%#','%i','%i','%#','%i','%i','%i','%i','%i','%i','%#');",intvalue1,
[[arrayvalue objectAtIndex:0] intValue],[[arrayvalue objectAtIndex:1] intValue],[arrayvalue objectAtIndex:2],[[arrayvalue objectAtIndex:3] intValue],[[arrayvalue objectAtIndex:4]intValue ],[arrayvalue objectAtIndex:5],[[arrayvalue objectAtIndex:6]intValue],[[arrayvalue objectAtIndex:7]intValue ],[[arrayvalue objectAtIndex:8] intValue],[[arrayvalue objectAtIndex:9] intValue],[[arrayvalue objectAtIndex:10]intValue ],[[arrayvalue objectAtIndex:11]intValue],[arrayvalue objectAtIndex:12]];
char *err1;
if (sqlite3_exec(myDatabase,[sql1 UTF8String],NULL,NULL,&err1)==SQLITE_OK)
{
NSLog(#"value inserted:");
}
[sql1 release];
sqlite3_close(myDatabase);
}
}
//------------fetch all value-------------//
-(NSMutableArray *)fetchValue
{
NSMutableArray *list=nil;
list=[[[NSMutableArray alloc]init] autorelease];
if(sqlite3_open([databasePath UTF8String],&myDatabase)==SQLITE_OK)
{
NSString *sql=[NSString stringWithFormat: #"select * from setting where primaryKey=1"];
sqlite3_stmt *statement;
if(sqlite3_prepare_v2(myDatabase, [sql UTF8String], -1,&statement, NULL)==SQLITE_OK)
{
if(sqlite3_step(statement)==SQLITE_ROW)
{
for(int i=0;i<=13;i++)
{
char *pass=(char*)sqlite3_column_text(statement,i);
NSString *msg=[[NSString alloc]initWithUTF8String:pass];
[list addObject:msg];
[msg release];
}
}
sqlite3_finalize(statement);
}
sqlite3_close(myDatabase);
}
return list;
}
//----------------update setting table method---------------//
-(void)updateSetting:(NSArray *)arr
{
if(sqlite3_open([databasePath UTF8String],&myDatabase)==SQLITE_OK)
{
NSLog(#"opened");
sqlite3_stmt *compiledStmt;
// NSLog(#"%#",arr);
NSString *sqlStmt=[NSString stringWithFormat:#"UPDATE setting SET ragular=%i,cycle=%i, flow='%#', hour=%i,minute=%i,formate='%#' ,tenminute=%i ,thirtyminute=%i,sixtymin=%i, twentymin=%i, fourtyfivemin=%i ,other='%#',formatemessage ='%#' WHERE primaryKey=%i;",[[arr objectAtIndex:0]intValue],[[arr objectAtIndex:1]intValue],[arr objectAtIndex:2],[[arr objectAtIndex:3]intValue],[[arr objectAtIndex:4]intValue],[arr objectAtIndex:5],[[arr objectAtIndex:6]intValue],[[arr objectAtIndex:7]intValue],[[arr objectAtIndex:8]intValue],[[arr objectAtIndex:9]intValue],[[arr objectAtIndex:10]intValue],[arr objectAtIndex:11],[arr objectAtIndex:12],1];
// NSLog(#"%#",sqlStmt);
if(sqlite3_prepare_v2(myDatabase, [sqlStmt UTF8String],-1,&compiledStmt, NULL)==SQLITE_OK)
{
NSLog(#"updateding......cycle");
}
sqlite3_step(compiledStmt);
sqlite3_close(myDatabase);
}
}