Filterarray mit Wörterbüchern mit NSPredicate

Question

Es gibt ein Array mit jedem Element ist ein NSDictionary.

NSMutableArray *mutArr = [NSMutableArray array]; 

for (Person *person in persons) { 
    NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:person.name, @"name", person.email, @"email", nil]; 
    [mutArr addObject:dict]; 
} 

self.arr = [[NSArray alloc] initWithArray:mutArr]; 

Wie die arr mit Namen oder E-Mail an Filer enthält Zeichenfolge @"filter string" durch filterArrayUsingPredicate: Methode.

Vielen Dank im Voraus!

Answer 1

Bitte siehe Beispiel unten:

NSArray *array = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"filter string" forKey:@"email"]]; // you can also do same for Name key... 
    NSArray *filteredarray = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(email == %@)", @"filter string"]]; 

Answer 2

Check this out:

var customerNameDict = ["firstName":"karthi","LastName":"alagu","MiddleName":"prabhu"]; 
var clientNameDict = ["firstName":"Selva","LastName":"kumar","MiddleName":"m"]; 
var employeeNameDict = ["firstName":"karthi","LastName":"prabhu","MiddleName":"kp"]; 

var attributeValue = "karthi"; 

var arrNames:Array = [customerNameDict,clientNameDict,employeeNameDict]; 

var namePredicate = NSPredicate(format: "firstName like %@",attributeValue); 

let filteredArray = arrNames.filter { namePredicate.evaluateWithObject($0) }; 
println("names = ,\(filteredArray)");