ios - How not to ask for publish permission everytime? -

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i did in facebook

[self vsuspendandhaltthisthreadtillunsuspendedwhiledoing:^{     [[nsoperationqueue mainqueue] addoperationwithblock:^{         [self.acastore requestaccesstoaccountswithtype:self.acaccounts options:[self dicpostoptions] completion:^(bool granted, nserror *error) {             self.bpermissiontoaccessstoregranted=granted;             [self vcontinue];         }];     }]; }];

basically asking publish permission. want check whether such publish permission has been granted or not before asking again.

how so?

to check permissions available:

      if(![postrequest.session.permissions containsobject:@"publish_actions"])

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