-sendPasswordResetWithEmail:completion:

Initiates a password reset for the given email address.

See 07001 for a list of error codes that are common to all API methods.

在Swift 3.x和Firebase 3.x中,它看起来像这样：

FIRAuth.auth()?.sendPasswordReset(withEmail: "email@email") { error in
    // Your code here
}

编辑：

Firebase 4将Firebase功能更改为与Swift中的命名约定更加一致.

Auth.auth().sendPasswordReset(withEmail: "email@email") { error in
    // Your code here
}