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

Question

I want to copy my sqlite database from the database location with latest updates to my iOS application every time I launch the application.
Is there any way to do it?

Answer 1

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.

Answer 2

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);
}

Answer 3

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
}

Answer 4

try this one:
NSArray *docPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *strDocDirectory = [docPath objectAtIndex:0];
self.strDatabasePath = [strDocDirectory stringByAppendingPathComponent:YOUR_DB];
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: self.strDatabasePath ] == NO)
{
const char *dbpath = [self.strDatabasePath UTF8String];
sqlite3 *contactDB;
if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK)
{
char *errMsg;
const char *sql_stmt = "CREATE TABLE IF NOT EXISTS YOUR_Table (ID INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT)";
if (sqlite3_exec(contactDB, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
{
NSLog(#"Failed to create table");
}
sqlite3_close(contactDB);

Answer 5

Try this in AppDelegate Class
.h file
#property(nonatomic, retain) NSString *dbPath;
.m file
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self copyDatabaseIfNeeded];
}
- (void) copyDatabaseIfNeeded
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success)
{
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"sampleDB.sqlite3"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}
/********* Database Path *********/
- (NSString *) getDBPath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:#"sampleDB.sqlite3"];
}
It'll automatically copy, if it doesn't found any database in application.
Hopefully, it'll help you.
Thanks.

Answer 6

-(void)openDatase{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
self.databasePath = [documentsDirectory stringByAppendingPathComponent:#"weightCal.sqlite"];
if (sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {
NSLog(#"Database Successfully Opened ");
} else {
NSLog(#"Error in opening database ");
}
}
-(void)dealloc{
sqlite3_close(database);
[super dealloc];
}
-(void)copyDatabase {
BOOL success;
NSFileManager *fileManager=[NSFileManager defaultManager];
NSError *error;
NSArray *paths= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory=[paths objectAtIndex:0];
NSString *writablePath = [documentsDirectory stringByAppendingPathComponent:#"test.sqlite"];
success = [fileManager fileExistsAtPath:writablePath];
if(success) {
return;
}
NSString *defaultPath=[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"test.sqlite"];
success=[fileManager copyItemAtPath:defaultPath toPath:writablePath error:&error];
if(!success){
NSAssert1(0,#"Failed to create writable database file with message '%#' .",[error localizedDescription]);
}
}
Declare following teo variable in .h:
sqlite3 *database;
NSString *databasePath;