How to check if directory exists at particular path programmatically in Objective-C?

Please tell me how to

1. Get the current working directory's absolute path

2. If this is the absolute path /Users/iphone/Documents/Archive

   how to convert this path to relative path?

3. How to check if directory exists at patricular path programmatically in Objective-C and if it doesn't exist how to create it programmatically? i need to do this using relative path.

Thank 开发者_如何转开发You.

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The main source of information is the Apple File System Programming Guide

From there or subtopics you get information for your questions.

1) NSFileManager currentDirectoryPath

3) NSFileManager fileExistsAtPath:isDirectory: