NSURL

/path/to/foo.txt
.isFileURLfalse
.absoluteString/path/to/foo.txt
.absoluteURL/path/to/foo.txt
.fragmentnil
.hostnil
.lastPathComponentfoo.txt
.parameterStringnil
.passwordnil
.path/path/to/foo.txt
.pathComponents/, path, to, foo.txt
.pathExtensiontxt
.portnil
.querynil
.relativePath/path/to/foo.txt
.relativeString/path/to/foo.txt
.resourceSpecifier/path/to/foo.txt
.schemenil
.standardized/path/to/foo.txt
.usernil
.filePathURLnil
.deletingLastPathComponent/path/to/
.deletingPathExtension/path/to/foo
.standardizingPath/path/to/foo.txt