First create Person model to use with Array
class Person : NSObject {
let name : String
let age : Int
let salary : Double
init(name:String, age:Int, salary:Double){
self.name = name
self.age = age
self.salary = salary
}
}
Then create an array of person with some initialize data
let arrPeople = [
Person(name: "Mary", age: 21, salary: 100),
Person(name: "Tina", age: 22, salary: 200),
Person(name: "Kin", age: 23, salary: 300),
Person(name: "Pal", age: 24, salary: 400),
Person(name: "Qusa", age: 25, salary: 500)
]
Create 3 predicate consisting of Name, Age and Salary
let namePredicate = NSPredicate(format: "name == \"Qusa\" ", argumentArray: nil)
let agePredicate = NSPredicate(format: "age == 22", argumentArray: nil)
let salaryPredicate = NSPredicate(format: "salary == 300", argumentArray: nil)
Then fetch the result from the 3 predicates using function Filtered
let arrName = (arrPeople as NSArray).filtered(using: namePredicate) as! [Person]
let arrAge = (arrPeople as NSArray).filtered(using: agePredicate) as! [Person]
let arrSalary = (arrPeople as NSArray).filtered(using: salaryPredicate) as! [Person]
Finally print to see the result
print("Predicate name result : \(arrName.first?.name ?? "" ) ")
print("Predicate age result : \(arrAge.first?.name ?? "" )")
print("Predicate salary result : \(arrSalary.first?.name ?? "" )")
Congratulation, you just know how to use NSPredicate with Array. Here is the full source code.
