ios - dismissViewControllerAnimated:completion: not executed -

when call dismissviewcontrolleranimated:completion: dismiss uiviewcontroller completion block never executed when corresponding view in middle of being animated onto screen (using presentviewcontroller:animated:completion:).

the uiviewcontroller not dissappear. dismissviewcontrolleranimated:completion: being ignored.

the following code simplified code example because original bigger. code have given below simulates use-case network communication error might trigger view popup whilst view being popped-up @ same time..

code example:

nslog(@"presenting view");  [self presentviewcontroller:changelocationviewcontroller animated:yes completion:^{     nslog(@"view done presenting"); }];  nslog(@"dismissing view");  [self dismissviewcontrolleranimated:no completion:^{     nslog(@"view done dismissing"); }]; 

log output is:

2013-08-28 16:14:12.162 [1708:c07] presenting view
2013-08-28 16:14:12.178 [1708:c07] dismissing view
2013-08-28 16:14:12.583 [1708:c07] view done presenting

know how dismiss uiviewcontroller in these circumstances?

thanks in advance.

the reason code snippet isn't working because completion block in these methods executed @ later time after animations have completed. can see in logs: "dismissing view" happens before "view done presenting". try instead:

nslog(@"presenting view");  [self presentviewcontroller:changelocationviewcontroller animated:yes completion:^{     nslog(@"view done presenting");     nslog(@"dismissing view");      [self dismissviewcontrolleranimated:no completion:^{         nslog(@"view done dismissing");     }]; }]; 

edit:

if need make sure view dismissed when network error happens, try setting boolean instance variable called networkerrorfound.

when finish network connection, set yes if error happens. use code:

[self presentviewcontroller:changelocationviewcontroller animated:yes completion:^{     nslog(@"view done presenting");     nslog(@"dismissing view");      if (self.networkerrorfound) {         [self dismissviewcontrolleranimated:no completion:^{             nslog(@"view done dismissing");         }];     } }]; 

that way, it'll wait until it's done presenting dismiss. need handle case error happens after animation done (for instance, slow connection fails), that's outside scope of question.