Swift get Facebook AccessToken

Question

我正试图获得Facebook Accesstoken。当我打印accessToken时，它会返回一个带有appId和authenticationToken的对象，我如何解析出令牌？ 我使用下面的代码：

let loginManager = LoginManager() 
    loginManager.logIn([ .publicProfile, .userFriends, .email ], viewController: self) { loginResult in 
     switch loginResult { 
     case .failed(let error): 
      print(error) 
     case .cancelled: 
      print("User cancelled login.") 
     case .success(let grantedPermissions, let declinedPermissions, let accessToken): 

      print("accessToken: " + String(describing: accessToken)) 
      break 

     } 
    } 

Answer 1

你试图解析该令牌是一个结构

的实际令牌是：

accessToken.authenticationToken 

你的代码应该是这样的：

let loginManager = LoginManager() 
loginManager.logIn([ .publicProfile, .userFriends, .email ], viewController: self) { loginResult in 
    switch loginResult { 
    case .failed(let error): 
     print(error) 
    case .cancelled: 
     print("User cancelled login.") 
    case .success(let grantedPermissions, let declinedPermissions, let accessToken): 

     print("accessToken: " + accessToken.authenticationToken) 
     break 

    } 
}