iOS) Facebook 로그인 연동 custom Buttom으로 만들기

- 개발자 등록 및 초기 세팅 설정은 개발자 페이지를 참고하세요.

https://developers.facebook.com/docs/facebook-login

Facebook 로그인 - 문서 - Facebook for Developers

 

- 커스텀 버튼 코드

	func facebookLoginBtn()
	{ // 버튼 코드로 등록
	facebook_login_btn.translatesAutoresizingMaskIntoConstraints = false
	facebook_login_btn.setTitle("페이스북으로 계속하기", for: .normal)
	facebook_login_btn.setTitleColor(.black, for: .normal)
	facebook_login_btn.titleLabel?.font = .boldSystemFont(ofSize: 13)
	facebook_login_btn.addTarget(self, action: #selector(faceBookLoginButtonAction(_:)), for: .touchUpInside)
	facebook_login_btn.layer.cornerRadius = 5
	facebook_login_btn.layer.borderWidth = 1
	facebook_login_btn.clipsToBounds = true
	scroll_view.addSubview(facebook_login_btn)
	facebook_login_btn.topAnchor.constraint(equalTo: self.kakao_login_btn.bottomAnchor, constant : self.view.frame.height * 0.015).isActive = true
	facebook_login_btn.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: self.view.frame.width * 0.08).isActive = true
	facebook_login_btn.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: self.view.frame.width * -0.08).isActive = true
	facebook_login_btn.heightAnchor.constraint(equalToConstant: self.view.frame.width * 0.13).isActive = true
	}
	@objc func faceBookLoginButtonAction(_ sender : UIButton) // 버튼 변수 addtarget에
	{
	// 1
	let loginManager = LoginManager()
	if let _ = AccessToken.current {
	// Access token available -- user already logged in
	// Perform log out
	// 2
	loginManager.logOut()
	} else {
	// Access token not available -- user already logged out
	// Perform log in
	// 3
	loginManager.logIn(permissions: ["public_profile", "email"], from: self) { [weak self] (result, error) in
	// 4
	// Check for error
	guard error == nil else {
	// Error occurred
	print(error!.localizedDescription)
	return
	}
	// 5
	// Check for cancel
	guard let result = result, !result.isCancelled else {
	print("User cancelled login")
	return
	}
	//6 check for login Success
	GraphRequest.init(graphPath: "me", parameters: ["fields" : "id, name, email"]).start(completionHandler: {(connection, result, error) -> Void in
	print("error : ",error ?? "No Error")
	guard let facebook = result as? [String: AnyObject] else { return }
	let token = facebook["id"] as? String
	let name = facebook["name"] as? String
	let email = facebook["email"] as? String
	print("token : ",token ?? "no Token")
	print("name: \(name ?? "no Name")")
	print("email: \(email ?? "no Email")")
	})
	}
	}
	}

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