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ioscachingwatchkit

How to do in-memory and on disk data caching in watchkit extension?

I have an ios app which sends data in key value pairs to watchkit extension, so now I want to cache that key value pairs both in memory and on disk at watchkit extension. So what is the best way to do this?

Solution

  • Because you're using key/value pairs, it seems straightforward to keep your data in a NSDictionary while in-memory. To persist the dictionary to disk:

    [myDictionary writeToFile:@"MyFile" atomically:YES];

    To load the dictionary back from disk:

    NSMutableDictionary *myDictionary =
  [NSMutableDictionary dictionaryWithContentsOfFile:@"MyFile"];

    For what it's worth, NSArray supports the same functionality.