如何在核心数据对象中对字典数组进行排序？

Question

我想基于两个键（compartmentNumber＆amp; row）在JSON下面排序，并尝试下面提到的代码示例，通过一个错误。

{
    "response": {
        "flightLegId": "FL004",
        "loadable": [{
            "position": {
                "deckNumber": 1,
                "compartmentNumber": 1,
                "leftRight": "ALL",
                "row": 1
            },
            "uld": {
                "uldAirline": "KL",
                "uldNumber": "ULD007",
                "uldPrefix": "PAG",
                "commodity": [{
                    "commodityCode": "C",
                    "airportCode": "GLA",
                    "hasDangerousGoods": false,
                    "pieceCount": 0,
                    "weightKg": 710
                }]
            }
        }, {
            "position": {
                "deckNumber": 1,
                "compartmentNumber": 1,
                "leftRight": "ALL",
                "row": 2
            },
            "uld": {
                "uldAirline": "KL",
                "uldNumber": "ULD007",
                "uldPrefix": "PAP",
                "commodity": [{
                    "commodityCode": "C",
                    "airportCode": "GLA",
                    "hasDangerousGoods": false,
                    "pieceCount": 5,
                    "weightKg": 780
                }, {
                    "commodityCode": "M",
                    "airportCode": "GLA",
                    "hasDangerousGoods": false,
                    "pieceCount": 5,
                    "weightKg": 780
                }]
            }
        }]
    }
}

 func sortResults(items: [Loadable]) -> [Loadable] {
            var sortResults: [Loadable] = []
            if let sortedArray = (items as NSArray).sortedArray(using: [
                NSSortDescriptor(key: "compartmentNumber", ascending: true),
                NSSortDescriptor(key: "row", ascending: true),
                ]) as? [Loadable] {
                sortResults = sortedArray
            }
            return sortResults
        }

Answer 1

使用此功能

 func sortResults(items: [Loadable]) -> [Loadable] {
        var sortResults: [Loadable] = []
        if let sortedArray = (items as NSArray).sortedArray(using: [
            NSSortDescriptor(key: "position.compartmentNumber", ascending: true),
            NSSortDescriptor(key: "position.row", ascending: true),
            ]) as? [Loadable] {
            sortResults = sortedArray
        }
        return sortResults
    }