Tilde-based Paths in Objective-C

In Objective-C, how do I go about converting tilde-based pathnames to full pathnames? That is, I'd like to convert fr开发者_如何学JAVAom ~/sandbox to /Users/TheBobs/sandbox.

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Use NSString's stringByExpandingTildeInPath: method.

There are also several other methods that make it easy to work with paths.