gistfile1.m

- (void)pusher:(PTPusher *)pusher connectionDidConnect:(PTPusherConnection *)connection {
    NSLog(@"PTPusher:connectionDidConnect %@", @"Connected");
    if (user != NULL) {
        NSString* channelName = [NSString stringWithFormat:@"user-%d", user.userId];
        NSLog(@"Subscribing to %@", channelName);
        PTPusherChannel* channel = [self.pusher channelNamed:channelName];
        if (channel != NULL) {
            [self.pusher unsubscribeFromChannel:channel];
        }
        [self.pusher subscribeToChannelNamed:channelName];
    }
}