目前我以这种方式显示用户的联系人
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如何仅显示与添加了列的用户具有相同电子邮件的用户? 当您创建新联系人时,它会自动将您的电子邮件的值分配给addedByUser。 因此,例如,如果我从帐户show@mycontact.com添加联系人,它将仅显示具有增值值的联系人用户:"显示@ mycontact"
答案 0 :(得分:2)
更新的答案 - 有两个选项: - )
let ref = FIRDatabase.database().reference(withPath: "contacts")
var newItems : [ContactItem] = []
ref.observe(.value, with: { snapshot in
for item in snapshot.children
{
let item = ContactItem(snapshot: item as! FIRDataSnapshot)
newItems.append(item)
}
let userID = FIRAuth.auth()?currentUser?.email
let itemsMatching = newItems.filter
{
$0.addedByUser == userID
}
let sortedNames = itemsMatching.sorted { $0.lastName < $1.lastName }
print(sortedNames)
})
另一方面,假设你正在迭代快照,你总是可以采用简单的方法
let ref = FIRDatabase.database().reference(withPath: "contacts")
var newItems : [ContactItem] = []
let userID = FIRAuth.auth()?currentUser?.email
ref.observe(.value, with: { snapshot in
for item in snapshot.children
{
let item = ContactItem(snapshot: item as! FIRDataSnapshot)
if item.addedByUser == userID
{
newItems.append(item)
}
}
let sortedNames = newItems.sorted { $0.lastName < $1.lastName }
print(sortedNames)
})