Sorting Custom Object Array in swift with different parameter

Solution 1

You can write your own logic into the closure you pass to sort.

So given this class

class GameInfo {
    var gameStatus: String
    var country: String
    var isSelected: Bool

    init(gameStatus: String, country: String, isSelected: Bool) {
        self.gameStatus = gameStatus
        self.country = country
        self.isSelected = isSelected
    }
}

and this list

let list = [
    GameInfo(gameStatus: "A", country: "Italy", isSelected: true),
    GameInfo(gameStatus: "A", country: "France", isSelected: true),
    GameInfo(gameStatus: "B", country: "UK", isSelected: true),
    GameInfo(gameStatus: "B", country: "Germany", isSelected: false),
    GameInfo(gameStatus: "A", country: "Italy", isSelected: true),
    GameInfo(gameStatus: "B", country: "UK", isSelected: false)
]

you can created a sorted list this way

let sorted = list.sort {
    guard $0.isSelected == $1.isSelected else { return $0.isSelected }
    guard $0.gameStatus == $1.gameStatus else { return $0.gameStatus < $1.gameStatus }
    guard $0.country == $1.country else { return $0.country < $1.country }
    return true
}

Solution 2

You can make your GameInfo class conform to Comparable.

class GameInfo: Comparable {
    var gameStatus: String
    var country: String
    var isSelected: Bool

    init(gameStatus: String, country: String, isSelected: Bool) {
        self.gameStatus = gameStatus
        self.country = country
        self.isSelected = isSelected
    }
}

func ==(left: GameInfo, right: GameInfo) -> Bool {
    return
        left.isSelected == right.isSelected &&
        left.gameStatus == right.gameStatus &&
        left.country == right.country
}

func <(left: GameInfo, right: GameInfo) -> Bool {
    guard left.isSelected == right.isSelected else { return left.isSelected }
    guard left.gameStatus == right.gameStatus else { return left.gameStatus < right.gameStatus }
    guard left.country == right.country else { return left.country < right.country }
    return true
}

Now you can just invoke sort without the need of furthers params.

let sorted = list.sort()

try this (old style Objective-C array sorting):

let sortedArray = (yourArray as NSArray).sortedArrayUsingDescriptors([
  NSSortDescriptor(key: "isSelected", ascending: true),
  NSSortDescriptor(key: "gameStatus", ascending: true),
  NSSortDescriptor(key: "country", ascending: true)
]) as! [GameInfo]

In that case, your GameInfo class must be like this. It's not the easy way to resolve your problem, just for info. Sorting with multiple conditions is very easy and natural with NSSortDescriptors but for Objective-C only, unless our swift classes are under some conditions (implementations).

class GameInfo : NSObject {
    var gameStatus: String?
    var country: String?
    var isSelected: Bool

    init(gameStatus: String, country: String, isSelected: Bool) {
        self.gameStatus = gameStatus
        self.country = country
        self.isSelected = isSelected
    }

    override func valueForKey(key: String) -> AnyObject? {
        if (key == "gameStatus") {
            return self.gameStatus
        } else if (key == "country") {
            return self.country
        } else if (key == "isSelected") {
            return self.isSelected
        } else {
            return nil
        }
    }
}

Try this.

your class look like below

import UIKit

class GameInfo : NSObject {

    var gameStatus :String = ""
    var country : String = ""
    var isSelected : Bool = false

    init(gameStatus: String, country: String, isSelected: Bool) {
        self.gameStatus = gameStatus
        self.country = country
        self.isSelected = isSelected
    }
}

And use this code for sorting. As per your need, you can set ascending parameter.

let list :NSArray = [
    GameInfo(gameStatus: "*", country: "Italy", isSelected: true),
    GameInfo(gameStatus: "1/2/21", country: "France", isSelected: true),
    GameInfo(gameStatus: "1-0", country: "UK", isSelected: true),
    GameInfo(gameStatus: "*", country: "Germany", isSelected: false),
    GameInfo(gameStatus: "0-1", country: "Italy", isSelected: true),
    GameInfo(gameStatus: "1/2-1/2", country: "UK", isSelected: false)
]

let isSelectedDescriptor: NSSortDescriptor = NSSortDescriptor(key: "isSelected", ascending: false)
let gameStatusDescriptor: NSSortDescriptor = NSSortDescriptor(key: "gameStatus", ascending: true)
let countryDescriptor: NSSortDescriptor = NSSortDescriptor(key: "country", ascending: true)


let sortedResults: NSArray = list.sortedArrayUsingDescriptors([isSelectedDescriptor,gameStatusDescriptor,countryDescriptor])

dump(sortedResults)