my call makes a call to HKSampleQuery method initWithSampleType that queries information from healthkit store. I want the main thread to wait until the the query is over so that the block handler updates the global variables in the custom class.
I understand concurrency but haven't used it enough. Please help me with this one.
my code goes like this...
[self methodone];
do something based on result
-(void)methodone
{
api call with blockhandle
{ set result to global variables in block};
}Let's clear up an issue. In your code will you please add the NSLog line in this:
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
HKHealthStore *store = [[appDelegate hkOperator] hkStore];
NSLog(@"going to execute the query NOW");
[store executeQuery:query]; Then run and tell us whether it printed "going to execute the query NOW" before it printed your "Quantity: " and how often it printed your "Quantity: " and what values it gave for your quantity?