不推荐使用Firebase和Xcode12 API，请使用fetchItemsForIdentityVerificationSignature：

如何解决不推荐使用Firebase和Xcode12 API，请使用fetchItemsForIdentityVerificationSignature：

我尝试将Firebase与Xcode 12结合使用，但是在安装并运行该项目后会遇到此警告。

'generateIdentityVerificationSignatureWithCompletionHandler：'已被弃用：iOS 13.5中首次弃用-API已弃用。使用fetchItemsForIdentityVerificationSignature：和teamPlayerID值来验证用户身份。

知道如何解决此问题吗？

此处是代码：

+ (void)getCredentialWithCompletion:(FIRGameCenterCredentialCallback)completion {
  /**
   Linking GameKit.framework without using it on macOS results in App Store rejection.
   Thus we don't link GameKit.framework to our SDK directly. `optionalLocalPlayer` is used for
   checking whether the APP that consuming our SDK has linked GameKit.framework. If not,a
   `GameKitNotLinkedError` will be raised.
   **/
  GKLocalPlayer *_Nullable optionalLocalPlayer = [[NSClassFromString(@"GKLocalPlayer") alloc] init];

  if (!optionalLocalPlayer) {
    if (completion) {
      completion(nil,[FIRAuthErrorUtils gameKitNotLinkedError]);
    }
    return;
  }

  __weak GKLocalPlayer *localPlayer = [[optionalLocalPlayer class] localPlayer];
  if (!localPlayer.isAuthenticated) {
    if (completion) {
      completion(nil,[FIRAuthErrorUtils localPlayerNotAuthenticatedError]);
    }
    return;
  }

  [localPlayer generateIdentityVerificationSignatureWithCompletionHandler:^(
                   NSURL *publicKeyURL,NSData *signature,NSData *salt,uint64_t timestamp,NSError *error) {
    if (error) {
      if (completion) {
        completion(nil,error);
      }
    } else {
      if (completion) {
        /**
         @c `localPlayer.alias` is actually the displayname needed,instead of
         `localPlayer.displayname`. For more information,check
         https://developer.apple.com/documentation/gamekit/gkplayer
         **/
        NSString *displayName = localPlayer.alias;
// iOS 13 deprecation
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        FIRGameCenterAuthCredential *credential =
            [[FIRGameCenterAuthCredential alloc] initWithPlayerID:localPlayer.playerID
                                                     publicKeyURL:publicKeyURL
                                                        signature:signature
                                                             salt:salt
                                                        timestamp:timestamp
                                                      displayName:displayName];
#pragma clang diagnostic pop
        completion(credential,nil);
      }
    }
  }];
}

解决方法

这对我有用：）

[localPlayer
   fetchItemsForIdentityVerificationSignature:^(NSURL *publicKeyURL,NSData     *signature,NSData *salt,uint64_t timestamp,NSError *error) {
    if (error) {
      if (completion) {
        completion(nil,error);
      }
    } else {
      if (completion) {
        /**
         @c `localPlayer.alias` is actually the displayname needed,instead of
         `localPlayer.displayname`. For more information,check
         https://developer.apple.com/documentation/gamekit/gkplayer
         **/
        NSString *displayName = localPlayer.alias;
// iOS 13 deprecation
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        FIRGameCenterAuthCredential *credential =
            [[FIRGameCenterAuthCredential alloc]     initWithPlayerID:localPlayer.playerID
                                                     publicKeyURL:publicKeyURL
                                                        signature:signature
                                                             salt:salt
                                                        timestamp:timestamp
                                                      displayName:displayName];
#pragma clang diagnostic pop
        completion(credential,nil);
      }
    }
  }];
}

,

我目前也在使用Firebase并使用类似代码的项目中。由于swift 5.3刚刚发布，因此还需要一些时间来更新API。如果您的项目按预期运行，请不要担心警告，因为您的代码仍会编译并有望运行。您可以在https://firebase.google.com/support/release-notes/ios处检查API的更新，更新后在终端中运行“ pod update”（就像安装它们时一样），它将解决此问题。这是在更新swift时发生的问题。