IPhone database storage

Question

Hi
My application have two databases. One that's static and one created by the user that should survive an appstore update of the application.
Where should I put the user created database?
Code sample?

Answer 1

You get bundle paths using the NSBundle class. To build document folder paths, you first retrieve the path to the Documents directory using the NSSearchPathForDirectoriesInDomains() function, then construct the rest of the path using NSString's stringByAppendingPathComponent: method.
My own code includes a little helper class to make this all simpler. You should be able to work out how to use both bundle paths and document folder paths by studying it.
* ArchUtils.h
* ArchUtils (C) 2008 Brent Royal-Gordon.
* You may use this in your own code as you wish, provided you leave this
* copyright notice intact.
#import <Foundation/Foundation.h>
typedef enum ArchUtilsDirectory {
ArchUtilsDocumentDirectory, /* Documents folder */
ArchUtilsResourceDirectory, /* Application bundle */
ArchUtilsTemporaryDirectory /* Temporary folder */
} ArchUtilsDirectory;
@interface ArchUtils : NSObject
+ (NSString*)pathForDirectory:(ArchUtilsDirectory)dir;
+ (NSString)pathForFile:(NSString)filename
inDirectory:(ArchUtilsDirectory)dir;
+ (NSString)pathForFile:(NSString)filename
ofType:(NSString*)type
inDirectory:(ArchUtilsDirectory)dir;
@end
* ArchUtils.m
* ArchUtils (C) 2008 Brent Royal-Gordon.
* You may use this in your own code as you wish, provided you leave this
* copyright notice intact.
#import "ArchUtils.h"
@implementation ArchUtils
+ (NSString*)pathForDirectory:(ArchUtilsDirectory)dir {
NSArray * paths;
NSString * path;
switch(dir) {
case ArchUtilsDocumentDirectory:
paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
path = [[[paths objectAtIndex:0] retain] autorelease];
break;
case ArchUtilsResourceDirectory:
path = [[NSBundle mainBundle] resourcePath];
break;
case ArchUtilsTemporaryDirectory:
path = NSTemporaryDirectory();
break;
return path;
+ (NSString)pathForFile:(NSString)filename
inDirectory:(ArchUtilsDirectory)dir {
if(dir == ArchUtilsResourceDirectory) {
return [[NSBundle mainBundle] pathForResource:filename ofType:nil];
else {
return [[self pathForDirectory:dir] stringByAppendingPathComponent:filename];
+ (NSString)pathForFile:(NSString)filename
ofType:(NSString*)type
inDirectory:(ArchUtilsDirectory)dir {
if(dir == ArchUtilsResourceDirectory) {
return [[NSBundle mainBundle] pathForResource:filename ofType:type];
else {
return [self pathForFile:[filename stringByAppendingPathExtension:type] inDirectory:dir];
@end