How to implement search using array of custom objects with help of NSPredicate?

Question

private  var contactsWithSections = [[WPH]]()

WPH have following properties:

class WPH: NSObject {
    var fName: String? = nil
    var lName: String? = nil
    var number: String? = nil
    var email: String? = nil
}

I want to search based on fName i.e. in array have fname = alex, fname = alena, fname = flora

let searchStr = "al"

Then result should return objects for alex and alena

Possible duplicate of Swift: Filtering an array of structures using UISearchController/Predicates — Willeke
– Willeke, Commented May 4, 2018 at 10:01

Harendra Tiwari · Accepted Answer · 2018-05-04 11:45:25Z

2

Found the more relevant solution that is a perfect match for my problem

let filtered = MasterList!.filter { (data) -> Bool in
            return data.fName?.range(of: Key, options: String.CompareOptions.caseInsensitive) != nil || data.lName?.range(of: Key, options: String.CompareOptions.caseInsensitive) != nil
        }

answered May 4, 2018 at 11:45

Harendra Tiwari

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Comments

Abdelahad Darwish · Accepted Answer · 2018-05-04 09:10:23Z

0

You can just use flat map then Filter

FlatMap will join all section filter will filter it with your key

let results  =  contactsWithSections.flatMap {$0}.filter { (obj) -> Bool in
        guard let keyValue = obj.fName else  {return false}
        return keyValue == searchStr
    }

edited May 4, 2018 at 9:10

answered May 4, 2018 at 9:00

Abdelahad Darwish

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3 Comments

Harendra Tiwari Over a year ago

it will not work for me. private var contactsWithSections = [[WPH]]() if have sections and contents. I need to search all matches with let searchStr = "al" but your code will returns unique values.

Harendra Tiwari Over a year ago

flat map is working fine but not returning matched results.

Abdelahad Darwish Over a year ago

this previous code should return matched result if condition ok , you will apply flatmap and after that will apply filter on flatted array see solution

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