我正在尝试连接firebase和facebook作为引用https://www.firebase.com/docs/ios/guide/login/facebook.html#section-authenticatingFacebookSDK3.21.1版本这是我遇到的问题state.value==FBSessionStateOpen.valueFBSessionStateOpen是未解析的标识符我已经创建了Bridge-Header其中包含#import我看到在FacebookSDK.framework中已经在FBSession.h中包含了FBSessionStateOpentype