ASWebAuthenticationSession on iOS 13

Question

I installed iOS 13, the authentication via Safari no longer works. I have the same configuration on iOS 12 except self.authSessionAS.presentationContextProvider = self;

self.authSessionAS = [[ASWebAuthenticationSession alloc]initWithURL:[[NSURL alloc] initWithString:self.authUrl] callbackURLScheme:@"app://" completionHandler:^(NSURL * _Nullable callbackURL, NSError * _Nullable error) {
    if(callbackURL)
    {
        self.resultStream(callbackURL.absoluteString);
    }else
    {
        self.resultStream(@"");
    }
    self.resultStream = NULL;
}];

self.authSessionAS.presentationContextProvider = self;
[self.authSessionAS start];

Answer 1

I find a solution

Add above the implementation.

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
@interface AppDelegate() <ASWebAuthenticationPresentationContextProviding>
@end
#endif

In your code for Auth.

self.authSessionAS = [[ASWebAuthenticationSession alloc]initWithURL:[[NSURL alloc] initWithString:self.authUrl] callbackURLScheme:@"app://" completionHandler:^(NSURL * _Nullable callbackURL, NSError * _Nullable error) {
    if(callbackURL)
    {
        self.resultStream(callbackURL.absoluteString);
    }else
    {
        self.resultStream(@"");
    }
    self.resultStream = NULL;
}];

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
if (@available(iOS 13, *)) {
    self.authSessionAS.presentationContextProvider = self;
}
#endif

[self.authSessionAS start];

Add method

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000
#pragma mark - ASWebAuthenticationPresentationContextProviding
- (ASPresentationAnchor)presentationAnchorForWebAuthenticationSession:(ASWebAuthenticationSession *)session  API_AVAILABLE(ios(13.0)){
   return UIApplication.sharedApplication.keyWindow;
}
#endif