title: Question mark in place of font icon for some font codes
body: <p>I have custom font icon TTF file downloaded to the device. I also have mappings for font icon name and its font code.</p>
  
  <p>A question mark is being displayed instead of font icon for some of the font code. The font code points are received from server in decimal number format. I am doing this to display font icon:</p>
  
  <pre><code> unichar decimal = [iconMap.fontCode unsignedShortValue];//fontCode is an NSNumber
   NSString *charStr = [NSString stringWithFormat:@"%C", decimal];
   [self.button setTitle:charStr forState:UIControlStateNormal];
  </code></pre>
  
  <p>Everything works fine I see the font icons but for some font code I am seeing a question mark.</p>
  
  <p><a href="https://i.stack.imgur.com/U974C.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/U974C.png" alt="enter image description here"></a></p>
  
  <p>In my font icon TTF file there are 369 icons ranging from font code <strong>E800</strong> to <strong>E9A7</strong>.</p>
  
  <blockquote>
    <p>Font icons are displayed <strong>correctly</strong> for font code range <strong>E800</strong> to
    <strong>E902</strong>.</p>
    
    <p>But for font icons for font code range <strong>E903</strong> to <strong>E9A7</strong> are
    displayed as <strong>question mark</strong>.</p>
  </blockquote>
  
  <p>Edit : Setting direct string literal like @"\uE903" to the label also displays a question mark.</p>
  
  <p>Note : I verified that all the icons (font code ranging from <strong>E800</strong> to <strong>E9A7</strong>) are present in font icon TTF file.</p>
  
  <p>I don't know what is the issue here? Please help.</p>