I think you should post some code. Make sure your non-ui extension has embeded in your app. Have you gone through all the requirements? e.g. private entitlement for extension. You can refer to my entitlement and Info.plist above.

I have tried adding [super viewDidLoad], but it still doesn't work. I dont' call the completion handler until the user has logged in successfully.

My current solution is adding method beginAuthorizationWithCompletion to principal class: (void)beginAuthorizationWithCompletion:(void (^)(PKPaymentAuthorizationResult *))completion {PKPaymentAuthorizationResult *authorizationResult = [[PKPaymentAuthorizationResult alloc] initWithStatus:PKPaymentAuthorizationStatusSuccess errors:nil]; completion(authorizationResult); } . But I don't know the real reason, Would you please give me some advice ?

Sure, my current solution is adding method beginAuthorizationWithCompletion to principal class: ` (void)beginAuthorizationWithCompletion:(void (^)(PKPaymentAuthorizationResult *))completion { PKPaymentAuthorizationResult *authorizationResult = [[PKPaymentAuthorizationResult alloc] initWithStatus:PKPaymentAuthorizationStatusSuccess errors:nil]; completion(authorizationResult); } ` That'is so magical, but I don't know the real reason. Actually I got this from Chat-GPT.