iphone - can't create sqlite3 database in ios -

create database code

this code correct. used code create database it's successful run , created database test application remove or delete simulator app , again run application see database not created.

please tell me actual problem face.

clsupdatenetworkviewcontroller.h

#import <uikit/uikit.h> #import "person.h" #import <sqlite3.h>  @interface clsupdatenetworkviewcontroller : uiviewcontroller{     uitextfield *name;    uitextfield *phone;    nsstring *databasepath;    sqlite3 *contactdb;    int rowcount;  }  @property (nonatomic, strong) person *person; @property (nonatomic, strong) nsstring *firstname; @property (nonatomic, strong) nsstring *lastname; @property (nonatomic, strong) nsstring *fullname; @property (nonatomic, strong) nsstring *phonenumber; @property (nonatomic, strong) nsstring *workemail;  @end 

clsupdatenetworkviewcontroller.m

 #import "clsupdatenetworkviewcontroller.h"  #import "clsmainpageappdelegate.h"  #import "clsaddressbookviewcontroller.h"   @interface clsupdatenetworkviewcontroller ()  @end  @implementation clsupdatenetworkviewcontroller  @synthesize  person,firstname,lastname,fullname,phonenumber,workemail; @synthesize name,phone;  - (void)viewdidload {    [super viewdidload]; // additional setup after loading view.     [self createdatabase]; }    -(void) createdatabase {    nsstring *docsdir;    nsarray *dirpaths;     // documents directory    dirpaths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     docsdir = [dirpaths objectatindex:0];     // build path database file    databasepath = [[nsstring alloc] initwithstring: [docsdir stringbyappendingpathcomponent: @"contacts.db"]];     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, phone text)";             if (sqlite3_exec(contactdb, sql_stmt, null, null, &errmsg) != sqlite_ok)            {                nslog(@"failed create table");             }             sqlite3_close(contactdb);         }        else        {            nslog(@"failed open/create database");         }    }  } 

i test or debug application

code not going inside condition. if ([filemgr fileexistsatpath: databasepath ] == no) {     // inside code not executed. } 

call function @ didfinishlaunchingwithoptions:

-(void)createdb { nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes); nsstring *documentsdirectory = [paths objectatindex:0]; nsstring *dbpath = [documentsdirectory stringbyappendingpathcomponent:@"emp.sqlite"];  nsurl *dburl = [nsurl fileurlwithpath:dbpath];  // copy database bundle if not present // on disk nsfilemanager *fm = [nsfilemanager defaultmanager]; if (![fm fileexistsatpath:dbpath]) {     nsurl *bundlepath = [[nsbundle mainbundle] urlforresource:@"emp" withextension:@"sqlite"];     nserror *error = nil;     if (!bundlepath || ![fm copyitematurl:bundlepath tourl:dburl error:&error]) {         nslog(@"error copying database bundle: %@", error);     } } else {     nslog(@"success in copy file"); } }