iOS8: Sharing common files between apps

Question

Two iOS: AppA and AppB

Both Apps are created by me and I would like to share one single file between both of the apps.

i.e. AppA launches on deviceA and the User saves data on fileA. Later the User launches AppB on the same (deviceA) and also saves data on fileA. Both apps are saving data on the same file.

I'm aware that I can use NSUserDefaults and share Keychain between apps, but that's not what I'm looking for.

I read up on document extensions provider and app groups, but I'm confused if I can use these for this scenario? Or is there any other way to accomplish this?

score 0 · Answer 1 · answered May 21 '15 at 16:29

0

You could just upload the files after saving to your server and make both apps request updates for the file whenever they are launched.

Hope that helps :)

answered May 21 '15 at 16:29

LinusGeffarth

27,197
29
120
174

Oh ok, but you should state that in the question. – LinusGeffarth May 21 '15 at 16:41
I stated a very clear example. Nowhere did it say that a User connects to the internet. – user1107173 May 21 '15 at 16:54
Sure but you have explicitely say what you want. If you do not want to use the Internet then you have to write that b/c otherwise what I offered is a possible solution. – LinusGeffarth May 21 '15 at 17:16

score 0 · Accepted Answer · answered May 21 '15 at 16:36

You can do it using Application Group Container Directory:

NSFileManager *fm = [NSFileManager defaultManager];
NSString *appGroupName = @"Z123456789.com.example.app-group"; /* For example */

NSURL *groupContainerURL = [fm containerURLForSecurityApplicationGroupIdentifier:appGroupName];
NSError* theError = nil;
if (![fm createDirectoryAtURL: groupContainerURL withIntermediateDirectories:YES attributes:nil error:&theError]) {
    // Handle the error.
}

iOS8: Sharing common files between apps

2 Answers2