Question

i start the product request already in a operation block

NSOperationQueue * queue = [[NSOperationQueue alloc] init];

[queue addOperationWithBlock:^{
      SKProductsRequest * request= [[SKProductsRequest alloc] initWithProductIdentifiers: selectedSKIdentifiers];

      request.delegate = self;

      [request start];

}];

so i would like to use some synchronous version, like when downloading data

NSData * data = [[NSData alloc] initWithContentsOfURL:url];

or parsing XML is also synchronous

NSXMLParser * parser = [[NSXMLParser alloc] initWithData:xmlData];
[parser setDelegate:self];
[parser parse];
[parser release];

Is there a way for to do the SKProductsRequest synchronous

The apple documentation luck on further info on this topic at this day

Answer 1

i found a way how to make any method synchronous :

// create the object that will perform an async operation
MyConnection *conn = [MyConnection new];

// create the semaphore and lock it once before we start
// the async operation
self.theLock = [NSConditionLock new];

// start the async operation
self.testState = 0;
[conn doItAsyncWithDelegate:self];

// now lock the semaphore - which will block this thread until
// [self.theLock unlockWithCondition:1] gets invoked
[self.theLock lockWhenCondition:1];

// we're done
[self.theLock release];
[conn release];

Make sure to invoke!!!!!!!!!!!!!!!!!

[self.theLock unlockWithCondition:1];

In the delegate(s) then.