ios - 删除 Firebase 中的字典元素

Question

我正在尝试删除 firebase 中的字典元素

我想删除对象:-

D8QmnOSH6vRYiMujKNXngzhdn992:“真”在 PendingFriendRequests/RhiZYyMF7STn1vyA27HjnJRsLYb2到目前为止，我已经想出了这个:-

FIRControllerClass.ref.child("PendingFriendRequests").child(FIRAuth.auth()!.currentUser!.uid).observeSingleEventOfType(.Value, withBlock: {(Snapshot) in

                        let dict = Snapshot.value! as! NSMutableDictionary

                        for each in dict {
                        print(each)

                            print(acceptedFriend)

                            if each.key as! String == acceptedFriend{
                                print(each.key)
                                dict.removeObjectForKey(each.key)
                                print(dict)
                                }
                            FIRControllerClass.ref.child("PendingFriendRequests").child(acceptedFriend).setValue(dict)
                            }
                        })

Answer 1

https://firebase.google.com/docs/firestore/manage-data/delete-data?authuser=0

var cityRef = db.collection('cities').doc('BJ');

// Remove the 'capital' field from the document
var removeCapital = cityRef.update({
    capital: firebase.firestore.FieldValue.delete()
});