CODEWITHSUNDEEP
iphoneobjective-cxcode
Rajneesh071
Rajneesh071

Reputation: 31073

Whats the difference between saving content at document directory or temp folder?

I want to save multipel photos in my application, so that application run in background. So what is the main difference between saving photos in doc dir or temp path.

And suggest me which is best way to save photos

  1. Document Dir
  2. Temp Folder
  3. NSUserDefaults

Thanks in advance

Upvotes: 2

Views: 2287

Answers (2)

Vladimir Obrizan
Vladimir Obrizan

Reputation: 2593

Here is a reference: File System Programming Guide.

Temp folder:

Use this directory to write temporary files that do not need to persist between launches of your app. Your app should remove files from this directory when it determines they are no longer needed. (The system may also purge lingering files from this directory when your app is not running.)

Documents folder:

Use this directory to store critical user documents and app data files. Critical data is any data that cannot be recreated by your app, such as user-generated content.

Usually, I put files in temporary folder only when I cache something and I don't care if these files will be deleted. If I want to be sure these files should live long life, I put them to documents folder.

Upvotes: 4

user529758
user529758

Reputation:

The main difference is the path: <sandbox>/Documents or <sandbox>/tmp.

Some more differences:

  1. The Documents directory can be accessed via iTunes if your app has file sharing enabled.

  2. The contents of the tmp directory is volatile, the OS is free to purge it in order to save space.

About NSUserDefaults: that's something completely different, it's a mechanism which stores app-specific configuration data in property lists, I can't imagine how and/or why you would use it for storing images.

Upvotes: 2

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