How can I add NSAppTransportSecurity to my info.plist file?

try With this --- worked for me in Xcode-beta 4 7.0

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>yourdomain.com</key>
        <dict>
            <!--Include to allow subdomains-->
            <key>NSIncludesSubdomains</key>
            <true/>
            <!--Include to allow HTTP requests-->
            <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
            <true/>
            <!--Include to specify minimum TLS version-->
            <key>NSTemporaryExceptionMinimumTLSVersion</key>
            <string>TLSv1.1</string>
        </dict>
    </dict>
</dict>

Also one more option, if you want to disable ATS you can use this :

<key>NSAppTransportSecurity</key>  
 <dict>  
      <key>NSAllowsArbitraryLoads</key><true/>  
 </dict>

But this is not recommended at all. The server should have the SSL certificates and so that there is no privacy leaks.

You have to add just the NSAllowsArbitraryLoads key to YES in NSAppTransportSecurity dictionary in your info.plist file.

For example,

 <key>NSAppTransportSecurity</key>
 <dict>
      <key>NSAllowsArbitraryLoads</key>
     <true/>
 </dict>