How to copy sqlite database when application is launched in iOS?

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.

use below code for coping database when application launch

in your appdelegate.m

in

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{  [self getdatabase];  return YES;}

and add below function in to your appdelegate.m

-(void)getdatabase{    BOOL success;    NSFileManager *filemanager = [NSFileManager defaultManager];    NSError *error;    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *DBPath = [pathArray objectAtIndex:0];    NSString *writableDBPath = @"";    writableDBPath = [DBPath stringByAppendingPathComponent:@"xyz.sqlite"];    NSLog(@"writableDBPath:%@",writableDBPath);    success = [filemanager fileExistsAtPath:writableDBPath];    if (!success) {        NSString *defaultDBpath = [[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:@"xyz.sqlite"];       success = [filemanager copyItemAtPath:defaultDBpath toPath:writableDBPath error:&error];       if (!success) {            NSAssert(0, @"failed to copy database at path with message '%@'.",[error localizedDescription]);         }    }         NSLog(@"111writableDBPath:%@",writableDBPath);    }

Here it is in Swift 4/5

    func copyDatabaseIfNeeded(sourcePath : String) -> Bool {      var destPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first!      destPath = destPath + "/foo.db3"      let databaseExistsWhereNeeded = FileManager.default.fileExists(atPath: destPath)      if (!databaseExistsWhereNeeded) {        do {            try FileManager.default.copyItem(atPath: sourcePath, toPath: destPath)            print("db copied")        }        catch {            print("error during file copy: \(error)")        }    }    return true}