The TouchID fingerprint sensor , which was used on previous models to unlock the iPhone , has been replaced with a new authentication technology called ' FaceID ' which can verify the user 's identity by scanning their face in 3D .
新iphone采用面部解锁方式来代替之前的“TouchID”指纹传感器，该面部识别系统可从3D角度来扫描用户的面部。
faceid