Unable to remove SQLite Database file - ios

Question

I am new to Xcode and ios. I am using Xcode 7.3 version and swift2.2
I have removed a per-populated SQlite Db from my project. Later, I used Add file menu in Xcode to add the same name SQLite Db with only modified the content of the field. Example , fieldname :addr , the content :123, 5th ave , now the same filedname :addr ,the content :12, Broadway
After added the modified content SQLite DB, the code STILL using the old content that is 123,5th ave!
let querySQL = "select Sid, location, Addr from tblPlaces where Sid =" + myId
let result: FMResultSet? = MyDB.executeQuery(querySQL, withArgumentsinArray:nil)
if result?.next() == true {
let strAddr = results!stringForColumn("Addr")
}else {
}
I have created a class to handle the creation of SQLite DB in AppDelegate:
Util.copyFile("SqliteDB filename")
here the code:
class func copyFile(fileName: NSString) {
var dbPath: NSString = getPath(fileName)
var fileManager = NSFileManager.defaultManager()
if !fileManager.fileExistsAtPath(dbPath) {
let documentsURL = NSBundle.mainBundle().resourceURL
let fromPath = documentsURL!.URLByAppendingPathComponent(filename as string)
var error : NSError?
do {
try filemanager.CopyItemAtPath(fromPath.path!, toPath: dbPath)
}catch let error1 as NSError {
error = error1
}
}
// GetPath of the SQLite file
class func getPath(filename : String) -> string {
let documentDirectory = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory,inDomain:
UserDomainMask, appropriateURLURL:nil, create: true)
return documentDirectory.URLbyAppendingPathComponent(filename).path!
}
What this happened? How to do the right way?
If I remove the SQlite Db file say MyDB.sqlite, and later I add in the same name Db file with content modified, I should get the new content. But this is not the case.

Answer 1

You are putting your file in the application bundle, i.e., to be distributed with your app. That file is read only. To update the file (including scheme restructuring) you would need to copy the the file to your documents folder, and update it there. Otherwise, your update will fail, leaving you with the same file as before.
I think this is what is happening.
For distribution it is also necessary that any such file be flagged NOT to backup to icloud or the app is rejected.
I use the following method (sorry, obj c) to copy the file from the bundle to the documents directory (sorry this code is sloppy but it may convey the basic idea).
+ (void)copyBundleFileToStoresDirectory:(NSString *)filename
{
NSError *error;
NSURL *fileURL = [NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:filename ofType:nil]];
NSURL *pathURL = [SVOFileSystemMethods documentsSubdirectory:#"Stores" skipBackup:YES];
if (fileURL)
{
if([[NSFileManager defaultManager] copyItemAtURL:fileURL toURL:pathURL error:&error])
{
// NSLog(#"File successfully copied");
}
else
{
[[[UIAlertView alloc]initWithTitle:NSLocalizedString(#"error", nil) message: NSLocalizedString(#"Failed to copy database from bundle.", nil)
delegate:nil cancelButtonTitle:NSLocalizedString(#"OK", nil) otherButtonTitles:nil] show];
NSLog(#"Error description-%# \n", [error localizedDescription]);
NSLog(#"Error reason-%#", [error localizedFailureReason]);
}
}
}
// // flags URL to exclude from backup //
+ (BOOL) addSkipBackupAttributeToItemAtURL:(NSURL *)URL {
NSError *error = nil;
BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES]
forKey: NSURLIsExcludedFromBackupKey error: &error];
if(!success)
{
NSLog(#"Error excluding %# from backup %#", [URL lastPathComponent], error);
}
return success; }