title: Crash : if the file name consists forward slash like "te/st.pdf"
body: <p>If the file name consists forward slash like "te/st.pdf"    </p>
  
  <pre><code>[data writeToFile:@"/Documents/te/st.pdf" atomically:YES encoding:NSUTF8StringEncoding error:nil]
  </code></pre>
  
  <p>is there any solution rather than replacing the forward slash '/' with some other character.</p>