CODEWITHSUNDEEP
iosobjective-c
Kevin Amiranoff
Kevin Amiranoff

Reputation: 14543

Objective-c specific iOS version in @interface

I am trying to implement Apple Pay, and I try to implement 2 methods one for iOS10 and one for iOS11+,

So in my implementation I have:

-(void) paymentAuthorizationViewController
  (PKPaymentAuthorizationViewController *)controller
                                   didAuthorizePayment:(PKPayment *)payment
                                               handler:(void (^)(PKPaymentAuthorizationResult * _Nonnull))completion  API_AVAILABLE(ios(11.0))
        {
       self.completionResult = completion
            ...

- (void) paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                                    didAuthorizePayment:(PKPayment *)payment
                                             completion:(void (^)(PKPaymentAuthorizationStatus))completion 
            {
      self.completionStatus = completion
        ...

And in my interface I have:

@property (nonatomic, copy) void (^completionStatus)(PKPaymentAuthorizationStatus);
@property (nonatomic, copy) void (^completionResult)(PKPaymentAuthorizationResult *);

The issue I have is XCode give me the following warning in the interface:

'PKPaymentAuthorizationResult' is only available on iOS 11.0 or newer

Is it a correct way to implement version specific code? Can I specify version specific code in interfaces?

Upvotes: 2

Views: 1856

Answers (2)

Kerberos
Kerberos

Reputation: 4166

To silent the warning in the interface you can try to add the API_AVAILABLE macros like this: API_AVAILABLE(ios(11.0)) at the end of the declaration.

Upvotes: 5

Dare
Dare

Reputation: 2587

You can do this as well I believe. 

@property (nonatomic, copy) void (^completionResult)(PKPaymentAuthorizationResult *) API_AVAILABLE(ios(11.0));

Upvotes: 3

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