NSURL

file:///path/to/foo.txt
.isFileURLtrue
.absoluteStringfile:///path/to/foo.txt
.absoluteURLfile:///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
.relativeStringfile:///path/to/foo.txt
.resourceSpecifier/path/to/foo.txt
.schemefile
.standardizedfile:///path/to/foo.txt
.usernil
.filePathURLfile:///path/to/foo.txt
.deletingLastPathComponentfile:///path/to/
.deletingPathExtensionfile:///path/to/foo
.standardizingPathfile:///path/to/foo.txt