Question

I am using presentViewController in xcode and not sure what should go into completion.

The code given by xcode documentation:

- (void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^)(void))completion NS_AVAILABLE_IOS(5_0);

Example that i am using:

[self presentViewController:second animated:YES completion:<#^(void)completion#>];

What should go into completion?

Answer 1

You can use the below code instead:

[self presentViewController:second animated:YES completion:^{ }];

or you can simply pass NULL

[self presentViewController:second animated:YES completion:NULL];

The completion block is used for doing any tasks after presenting the view controller , the code written inside the completion block will execute only after the view is presented.