How to assign non-null property to button?

Question

I am declaring an action for UIButton in myviewcontroller.h file like this

- (IBAction)loginClicked:(id)sender;

but I can see warning like Pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified). How can I resolve this issue?

thanks

Where exactly are you seeing this error? And you have added is IBAction and not declaration of button. — Vishnu gondlekar, Jul 22 '16 at 09:02

score 2 · Accepted Answer · answered Jul 22 '16 at 09:05

2

Replace

- (IBAction)loginClicked:(id)sender

With

-(IBAction) loginClicked:(nonnull id)sender

Read more at: https://developer.apple.com/swift/blog/?id=25

answered Jul 22 '16 at 09:05

Ronak Chaniyara

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How to assign non-null property to button?

1 Answers1