"how to copy sqlite database when application is launched in ios?" Code Answer

you can add following methods to your appdelegate

- (void) copydatabaseifneeded {

    //using nsfilemanager we can perform many file system operations.
    nsfilemanager *filemanager = [nsfilemanager defaultmanager];
    nserror *error;

    nsstring *dbpath = [self getdbpath];
    bool success = [filemanager fileexistsatpath:dbpath];

    if(!success) {

       nsstring *defaultdbpath = [[[nsbundle mainbundle] resourcepath] stringbyappendingpathcomponent:@"database.sqlite"];
       success = [filemanager copyitematpath:defaultdbpath topath:dbpath error:&error];

       if (!success)
          nsassert1(0, @"failed to create writable database file with message '%@'.", [error localizeddescription]);
    }
}

- (nsstring *) getdbpath
{   
    //search for standard documents using nssearchpathfordirectoriesindomains
    //first param = searching the documents directory
    //second param = searching the users directory and not the system
    //expand any tildes and identify home directories.

    nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory , nsuserdomainmask, yes);
    nsstring *documentsdir = [paths objectatindex:0];
    //nslog(@"dbpath : %@",documentsdir);
    return [documentsdir stringbyappendingpathcomponent:@"database.sqlite"];
}

and call this method in your did finish with launching method [self copydatabaseifneeded]; hope this will help.

By Vitorlui on May 20 2022