title: Calling a method makes Error
body: <p>I have one method with two arguments. one of them is an <code>Object</code> . when I want to call them it gives me this Error:</p>
  
  <p><strong>reciver type "myView" for instance message does not declare a method with selector "findCp::"</strong></p>
  
  <p>here is the code for my method that i made it less</p>
  
  <pre><code>-(double)findCp:(double)temp obj:(Component *)Obj{
      return temp;
  }
  </code></pre>
  
  <p>here <code>Component</code> is a <code>NSObject</code> class that Obj is one of its Objects.
  and I call my method in this way:</p>
  
  <pre><code>convertedTemp = [[self findCp:tempreture :Degree]doubleValue];
  </code></pre>
  
  <p>in actual code it makes some changes on temperature and give it back.
  also in myView.h I put </p>
  
  <pre><code>-(double)findCp:(double)temp obj:(Component *)Obj;
  </code></pre>
  
  <p>why I get this error? am I calling my method wrong? am I wrong with definitions? </p>