[英]Array of dictionary filter using predicate - swift3
我有很多字典。
>[{"name": "John",
"address":
{"home": "addr1",
"work": "add2"}
},
{"name": "Anu",
"address": {"home": "addr1",
"work": "add2"}
}]
我將其保存為這樣的用戶默認值-
let personData1 = [“ name”:“ John”,“ address”:{“ home”:“ addr1”,“ work”:“ add2”}] as [String:Any] let personData2 = [“ name”:“ Anu “,” address“:{” home“:” addr1“,” work“:” add2“}] as [String:Any]
var persons = [personsData, personsData1]
UserDefaults.standard.set(forKey: "persons")
用另一種方法檢索它,並根據名稱對其進行過濾。 讓名字=“ 約翰 ”
低於錯誤
無法使用類型為(((Any?)-> Bool)'的參數列表調用'filter'
這是代碼:-
func test () {
let personData1 = ["name": "John", "addresses": ["home":"addr1", "work": "addr2"]] as [String : Any]
let personData2 = ["name": "And", "addresses": ["home":"addr1", "work": "addr2"]] as [String : Any]
let persons = [personData1, personData2]
(UserDefaults.standard.set(persons, forKey: "persons")
print("Saved ----\(UserDefaults.standard.value(forKey: "persons"))")
if let savedPersons = UserDefaults.standard.value(forKey: "persons") {
let namePredicate = NSPredicate(format: "name like %@", name);
var filteredArray: [[String:Any]] = savedPersons.filter { namePredicate.evaluate(with: $0) }
print("names = \(filteredArray)")
}
}
如果我嘗試這樣過濾-
let filteredArray = savedBrs.filter { $0["name"] == name }
得到不同的錯誤-
類型“任何”的值沒有成員“過濾器”
使用NSPredicate
let arr = [["name":"Rego","address":["one":"peek","two":"geelo"]],["name":"pppp","address":["one":"peek","two":"geelo"]]]
let neededName = "Rego"
let pre = NSPredicate(format: "name == %@",neededName)
let result = arr.filter { pre.evaluate(with:$0) }
print(result)
沒有NSPredicate
let result = arr.filter { $0["name"] as? String == neededName }
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