Copying data to the Application Data folder on the iPhone

Question

I am in the process of (finally) loading my App onto an iPhone device for testing. So far I have only tested the App in the simulator. The application is data-centric and us

Answer 1

here how i done this create a class called DBManagement and in m file implement these methods.also put this line in implementation file above @implementation line

static sqlite3 *CHManagement = nil;

-(NSString *) getDBPath
{
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *MyDatabasePath = [documentsDirectory stringByAppendingString:@"/CHManagement.sqlite"];
  return MyDatabasePath;

 }

-(void) checkDataBase
{
NSLog(@"CheckDatabase Called");
NSFileManager *fileManager=[NSFileManager defaultManager];
NSError *error=[[[NSError alloc]init] autorelease]; 
NSString *dbPath = [self getDBPath];
BOOL success=[fileManager fileExistsAtPath:dbPath];
if(!success)
{
 NSString *defaultDBPath=nil;
 defaultDBPath=[[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:@"CHManagement.sqlite"];
 success=[fileManager copyItemAtPath:defaultDBPath  toPath:dbPath error:&error];
 if(!success)
 {
   NSAssert1(0,@"failed to create database with message '%@'.",[error localizedDescription]); 
  }
 }
 else
 {
 sqlite3 *MyDatabase;
 NSInteger VersionNumber=0;
 sqlite3_stmt *CompiledStatement=nil;
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *MyDatabasePath = [documentsDirectory stringByAppendingString:@"/CHManagement.sqlite"];
 if(sqlite3_open([MyDatabasePath UTF8String],&MyDatabase) == SQLITE_OK)
 {
  sqlite3_prepare_v2(MyDatabase, "select appVersionNo from VersionInfo", -1, &CompiledStatement, NULL);
  while(sqlite3_step(CompiledStatement) == SQLITE_ROW)
  {
   VersionNumber=sqlite3_column_int(CompiledStatement,0);
  }
  sqlite3_reset(CompiledStatement);
  sqlite3_finalize(CompiledStatement);
  sqlite3_close(MyDatabase);
 }
 if (VersionNumber!=1)
 {
  [self deleteDatabase];
  NSString *defaultDBPath=[[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:@"CHManagement.sqlite"];
  success=[fileManager copyItemAtPath:defaultDBPath  toPath:dbPath error:&error];
  if(!success)
  {
   NSAssert1(0,@"failed to create database with message '%@'.",[error localizedDescription]); 
   }
  }
 }
 }

- (void)deleteDatabase
{
NSLog(@"Delete Database Called");
NSError **error=nil;
NSFileManager *FileManager = [NSFileManager defaultManager];
NSString *databasepath = [self getDBPath];
  BOOL success = [FileManager fileExistsAtPath:databasepath];
if(success) {
[FileManager removeItemAtPath:databasepath error:error];
}
 }

with these methods you can easily load database into iphone document folder of the app. Sorry about the formatting. and appVersionNo is a field in a tableCalled versionInfo the default value is 1