can not access e-mail attachment
<p>I used the code below to get the email attachment file url.</p>

<pre><code>NSURL *url=(NSURL*)[launchOptions valueForKey:UIApplicationLaunchOptionsURLKey];
</code></pre>

<p>but </p>

<pre><code>bool b=[[NSFileManager defaultManager] fileExists:[url absoluteString];
</code></pre>

<p>always returns NO, which means the email attachment file does not exist.</p>

<p>Welcome any comment</p>
