KSWriter shamelessly rips off Java to provide a common interface for building up strings.
Questions about the code should be left as issues at https://github.com/karelia/KSWriter or message me on Twitter.
None beyond Foundation. Probably works back to OS X v10.0 if you were so inclined.
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KSWriter.m to your project. These files define the common interface
-writeString: for building up strings, as well as more advanced possibilities. Ideally, make this repo a submodule, but hey, it's your codebase, do whatever you feel like.
You can use
NSMutableString instances directly, or add other, specialist writers into your project, such as:
KSForwardingWriter provides a handy starting point for your own classes that work by piping output through to another
KSHTMLWriter builds on KSWriter to provide classes for generating string formats such as XML and HTML. It directly includes KSWriter as a submodule. It can also be built as a framework for Mac distribution, with the whole of KSWriter included and exposed.