ios - Objective-c : Execute a function in current class only after NSURLSession and NSXMLParser delegates complete in another class -

i have class1 in have load uitableview row on didselectrowatindexpath. in didselectrowatindexpath make call method in class2 thereby calls nsurlsession delegates , nsxmlparser delegates. want value of parsed data , reload uitableview row in class1.

i want reload uitableview after data. delegate methods asynchronous not able data , empty uitableview row.

what can solution?

on completion of data pulling , parsing in class2, let class1 know:

[[nsnotificationcenter defaultcenter] postnotificationname:@"kdataisready" object:@{@"key":@"value"}]; 

you need register class1 listener on (e.g. in viewdidload):

[[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(dataready:) name:@"kdataisready" object:nil]; 

which calls method in class1:

-(void)dataready:(nsnotification *)n {      nsdictionary * d = n.object;      nsstring * value = d[@"key"];     //e.g. update data array, refresh tableview / specific cell }