title: Creating an observable with RxSwift
body: <p>I'm using RxSwift and I'm trying to extend another library I'm using to make something observable.</p>
  
  <p>The library basically calls a delegate method every time a value changes, and I want to hook into this and whenever it calls the delegate, also add the new value to an observable sequence I want to create in my subclass.</p>
  
  <p>I've seen how you can create observable sequences, but in each example <code>next</code> events are sent to the observer within the block given to the <code>Observable.create</code> method. I have no idea how I can add things to the observable sequence from "outside" this block passed to <code>create</code>.</p>
  
  <p>I just want to create something that I can observe or can drive things with RxSwift, and manually add to the sequence at certain points.</p>
  
  <p>I'd be very grateful if someone could point me in the right direction, as I'm very new to this.</p>