[英]Remove value when listing firebase child node on tableViewCell
我正在尝试在表视图中列出Firebase节点中的所有用户(此方法有效),但随后希望从列表中删除当前用户(此方法无效)。
我尝试使用removeValue(),但它仍在表视图上与当前用户一起运行-我也不想从firebase中删除该用户
然后,我尝试使其仅在用户autoId不等于当前用户ID的情况下运行,但它仍显示在表格视图单元格上
将不胜感激:)
我的firebase结构是这样的:
"users" : {
"8x1SGi2P0KVOKm4i60JQLP1bdU63" : {
"fullname" : "bbbb",
"profileImageUrl" : "https://firebasestorage.googleapis.com/v0/b/pinion-4896b.appspot.com/o/profile_image%2F8x1SGi2P0KVOKm4i60JQLP1bdU63?alt=media&token=7932b14f-c2d8-46fd-9dd1-c607217fe8d3",
},
"B7rwHiCTlphZjKXfPSEzkIwl8RH2" : {
"fullname" : "Aaaa ",
"profileImageUrl" : "https://firebasestorage.googleapis.com/v0/b/pinion-4896b.appspot.com/o/profile_image%2FB7rwHiCTlphZjKXfPSEzkIwl8RH2?alt=media&token=072e1f41-935e-430d-af99-dc640381f8e6",
},
"FRuuk20CHrhNlYIBmgN4TTz3Cxn1" : {
"fullname" : "eeee",
"profileImageUrl" : "https://firebasestorage.googleapis.com/v0/b/pinion-4896b.appspot.com/o/profile_image%2FFRuuk20CHrhNlYIBmgN4TTz3Cxn1?alt=media&token=bf89b903-a51a-4d6d-bdef-fe2667d78842",
},
列出用户的代码:
func observeUsers(completion: @escaping (UserModel) -> Void) {
REF_USERS.observeSingleEvent(of: .childAdded, with: { snapshot in
if let dict = snapshot.value as? [String: Any] {
let user = UserModel.transformUser(dict: dict, key: snapshot.key)
//line below used first to remove value from listing on table view
//Api.User.REF_USERS.child("users").child(Api.User.CURRENT_USER!.uid).removeValue()
//line below - if user autoID is not equal to the current user then list
if user.id != Api.User.CURRENT_USER?.uid {
completion(user)
}
}
})
}
编辑:
func loadUsers() {
var allUsers = [String]()
Api.User.REF_USERS.observe(.value, with: { snapshot in
for child in snapshot.children { //build the array of keys
let snap = child as! DataSnapshot
let key = snap.key
allUsers.append(key)
print(allUsers)
}
})
}
而不是删除尝试使用此表数据的创建模型,然后在获取数据时为其创建一个空数组,将所有具有相同currentuser.uid的文件添加到表中,然后重新加载表视图,这将显示除当前用户外的所有数据
这是所承诺的代码:
但这需要对数据库进行一些修改,使数据库像这样的“用户”:{“ childbyautid”:{“ fullname”:“ name”,“ profileimageurl”:“您的url”,“ userid”:“ userid”}
然后你可以这样写
var myArr = [String]()
Database.database().reference.child("users").observe(.value){(snapshot) in
if snapshot.childcount > 1 { self.myArr.removeAll()
for data in snapshot.children.allObjects as! [DataSnapshot]{
if let d = data.value as? [string: any]{
if Auth.auth.currentuser.uid != d["userid"]{
myArr.append(d["name"]}else{print("this is the user itself"}}}
您可以在loadUsers中通过添加如下所示的userId检查来控制它
func loadUsers() {
var allUsers = [String]()
Api.User.REF_USERS.observe(.value, with: { snapshot in
for child in snapshot.children { //build the array of keys
let snap = child as! DataSnapshot
let key = snap.key
if key != currentUser.id{
allUsers.append(key)
}
print(allUsers)
}
})
}
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