ios - Sending message to Singleton Object -

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i have singleton class perform web service operations. suppose have created method -(void)getprofileswithname:(nsstring *)profilename profile information. using block objects response web service operations class. since web service operations singleton many objects can send same [self getprofileswithname:@"john"] messages @ time. in scenario first object makes web service request not receive data .

what proper way perform web service operations using singleton class ? can use nsoperationqueue ?

nsoperationqueue 1 possibility. queue.addoperationwithblock(_ block: () -> void) method adds new block. think without queue. not set block instance variable, use directly in success method or block.


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