title: How to make dictionary NSDictionary be thread safe for reading, inserting?
body: <p>At every start of application I have to fetch couple .plists from server and later some of them I am using in code ( depends on user's choice ). To avoid loading for very .plist I am at the entering in app I download all and parse every into dictionary and all of them put in cache dictionary ( key is plist name and value is plist parsed into dictionary). How to make dictionary ( NSDictionary or to use something else ) be thread safe for reading, inserting ?</p>