How to efficiently write large files to disk on background thread (Swift)

Question

Update

I have resolved and removed the distracting error. Please read the entire post and feel free to leave comments if any questions remain.

Answer 1

You should consider using NSStream (NSOutputStream/NSInputStream). If you are going to choose this approach, keep in mind that background thread run loop will need to be started (run) explicitly.

NSOutputStream has a method called outputStreamToFileAtPath:append: which is what you might be looking for.

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Writing a String to an NSOutputStream in Swift