title: No visible interface declares the method xx
body: <p>Getting this error for the method <code>setCircle</code> as you see in the photograph. It makes no sense at all: the method above, <code>setIsToday:</code>, is recognised just fine and is declared only once, directly above the <code>setCircle</code> method. as you can see, the method exists in the code only once, with two calls of this form:</p>
  
  <pre><code>[cell setIsToday];
  </code></pre>
  
  <p>which succeeded in both cases. If I do:</p>
  
  <pre><code>[cell setCircle];
  </code></pre>
  
  <p>instead I get the error.</p>
  
  <p><img src="https://i.stack.imgur.com/ox703.png" alt="enter image description here"></p>
  
  <p>Tried an Xcode restart, clean build, etc. No luck.</p>