Traditionally, iOS has retained your entire conversation history in the Messages database,so if you send a lot of pictures and videos via iMessage, this can eat up quite a bit of space on your iPhone over time. Prior to iOS 8, the only real way to deal with this was to remove an entire conversation, basically starting over, or to manually scroll back through your Messages history and remove individual items one-by-one. Fortunately, in iOS 8 there’s…
