问题
I am implementing the Firebase authentication by using OAuthProvider class to sign in with a personal microsoft account.
I have followed this instructions: https://firebase.google.com/docs/auth/ios/microsoft-oauth?authuser=0
However when I am using OAuthProvider of Firebase SDK it does not show up the sign in page of Microsoft, actually nothing gets invoked by getCredentialWith.
When I am using GoogleAuthProvider everything works fine and Firebase SDK shows up the sign in page of Google.
let provider = OAuthProvider(providerID: "microsoft.com")
provider.scopes = ["files.readwrite.appfolder", "user.read"]
provider.getCredentialWith(nil, completion: { credential, error in
if let error = error {
os_log("Firebase Error: %@", type: .fault, error as CVarArg)
return
}
if (credential != nil) {
Auth.auth().signInAndRetrieveData(with: credential!, completion: { authResult, error in
if let error = error {
os_log("Firebase Error: %@", type: .fault, error as CVarArg)
return
}
})
}
})
回答1:
Declare in global scope like below
var provider: OAuthProvider?
var authMicrosoft: Auth?
@IBAction func buttonTapped(_ sender: Any) {
provider = OAuthProvider(providerID: "microsoft.com")
provider?.customParameters = [
"prompt": "consent",
"login_hint": "",
]
provider?.scopes = ["mail.read", "calendars.read"]
provider?.getCredentialWith(nil ) { credential, error in
if error != nil {
// Handle error.
}
print(credential?.provider)
if let x = credential {
self. authMicrosoft?.signIn(with: x) { authResult, error in
if error != nil {
// Handle error.
}
print(authResult?.additionalUserInfo?.profile)
print(authResult?.user.providerID)
}
} else {
}
}
}
回答2:
It seems that you define a provider locally. While the getCredentialWith(_:completion) call gets executed asynchronously, your local function may already finished executing, and the provider may already be deallocated by ARC.
To solve your problem, you may need to specifically retain the provider pointer somewhere --- for instance in your view controller as a property or ivar, and by that way the provider can be created/recycled when your view controller is initialized/deallocated.
来源：https://stackoverflow.com/questions/55399758/firebase-does-not-show-up-sign-page-for-microsoft-com-in-swift-ios