How to manage scheduled maintenance in iOS Application? - iphone

Question

I am looking for a way to be able to handle scheduled maintenance in iPhone app. We are using web services(.Net/C#) in our application and recently we have increased number of servers to maintain trafic on website. So whenever web team uploading website, they are displaying website is on scheduled maintenance. for iPhone, i have written below code to handle timeout at the same time.
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0];
it will notify to user after 60.0 Sec. so users are complaining about Freezes iPhone application. Is there any other way to handle this? or Is there any other way to open any particular screen at the time of scheduled maintenance?
Any help would be greatly appreciated! Thanks.

Answer 1

iOS 7 silent background notifications might work for you in this case.

Answer 2

You need to execute this code on a separate thread. The easiest way to do this is using Grand Central Dispatch, like this:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
NSURLResponse *response = nil;
NSError *error = nil;
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0];
NSData *resultData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error];
// Add code to handle returningResponse.
// Error handling
if (error != nil) {
NSLog(#"An error occured! %#", error);
}
});