Hi Robert,
Thanks for emphasizing this, but I am really confused. I have a VOIP app. How
can I still have network connection in the background when my app uses
network-socket connection?
Also according to document:
In order for your application to maintain a persistent connection
while it is in the background, you must configure the sockets used to
communicate with your VoIP service. In iPhone OS, most sockets are
managed using higher-level constructs such as streams. As a result,
configuration of a socket to support VoIP occurs through the
higher-level interfaces. The only thing you have to do beyond the
normal configuration is add a special key that tags the interface as
being used for a VoIP service.
But how can iOS4 support voip when the app uses bsd sockets (not the high level
socket interface)?
Is there any way where I don't need to change my network implementation to high
level sockets?
Thanks!
Angie
> Subject: Re: iOS4: UDP sockets in the background
> From: rob...@izyapps.com
> Date: Fri, 25 Jun 2010 00:19:04 +0200
> CC: atanch...@live.com; cocoa-dev@lists.apple.com
> To: gerti-cocoa...@bitart.com
>
>
> On 23.6.2010, at 20:15, Gerd Knops wrote:
>
> > I have been doing that without a problem since early iOS 3, so no reason to
> > expect it would stop working in iOS4.
>
>
> FYI, doc quote ...
>
> Cancel any Bonjour-related services before being suspended. When your
> application moves to the background, and before it is suspended, it should
> unregister from Bonjour and close listening sockets associated with any
> network services. A suspended application cannot respond to incoming service
> requests anyway. Closing out those services prevents them from appearing to
> be available when they actually are not. If you do not close out Bonjour
> services yourself, the system closes out those services automatically when
> your application is suspended.
>
> Be prepared to handle connection failures in your network-based sockets. The
> system may tear down socket connections while your application is suspended
> for any number of reasons. As long as your socket-based code is prepared for
> other types of network failures, such as a lost signal or network transition,
> this should not lead to any unusual problems. When your application resumes,
> if it encounters a failure upon using a socket, simply reestablish the
> connection.
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