根据日期对 JSON 中的数据进行排序，并将 Tableview 部分的标题设置为日期，并根据日期对以下数据进行排序

Question

JSON 文件：

{
    "success": 1,
    "msg": "User Phone Usage",
    "data": [
        {
            "date": "2019-12-19",
            "val": [
                {
                    "ride_id": 44,
                    "date": "2019-12-19 09:32:19",
                    "total_km": null,
                    "startTime": "2019-12-19 09:32:19",
                    "endTime": "2019-12-19 09:37:08",
                    "rides": 0
                },
                {
                    "ride_id": 43,
                    "date": "2019-12-19 09:28:16",
                    "total_km": null,
                    "startTime": "2019-12-19 09:28:16",
                    "endTime": "2019-12-19 09:32:23",
                    "rides": 0
                },
                {
                    "ride_id": 42,
                    "date": "2019-12-19 09:28:12",
                    "total_km": null,
                    "startTime": "2019-12-19 09:28:12",
                    "endTime": "2019-12-19 09:29:13",
                    "rides": 0
                }
            ]
        },
        {
            "date": "2019-12-13",
            "val": [
                {
                    "ride_id": 2,
                    "date": "2019-12-13 08:14:34",
                    "total_km": 12.64,
                    "startTime": "2019-12-13 08:14:34",
                    "endTime": "2019-12-18 03:49:43",
                    "rides": 2
                }
            ]
        },
        {
            "date": "2019-12-12",
            "val": [
                {
                    "ride_id": 1,
                    "date": "2019-12-12 06:59:26",
                    "total_km": 101.36,
                    "startTime": "2019-12-12 06:59:26",
                    "endTime": "2019-12-18 03:07:00",
                    "rides": 0
                }
            ]
        }
    ]
}

所以我必须将 tableview 部分标题设置为 (date) 并显示在该特定日期发生的事件。

下面是我必须实现的示例图片

部分标题是日期和总公里数，游乐设施是我要根据指定日期填充的行。 API 数据保存在模型类中，而不是字典格式，因此需要一些解决方案，我可以对数据进行排序并将其显示在表格视图中。

模型类：

class ShowDetails
{

    var startRideDateTime:String?
    var rideID:Int?
    var endRideDateTime:String?
    var totalKM:Double?
    var rides:Int?


    init(rideID: Int?,totalKM: Double?, startRideDateTime: String?, endRideDateTime: String?, rides: Int?) {
        self.rideID = rideID
        self.totalKM = totalKM
        self.startRideDateTime = startRideDateTime
        self.endRideDateTime = endRideDateTime
        self.rides = rides
    }


}

视图控制器代码： showdetailsArray 是 API Response 中保存的数组

func grouping()
    {

        let groupData = Dictionary(grouping: self.showDetailsArray){ (element) -> String in
            return (element.startRideDateTime ?? "")
        }

        groupData.forEach { (key) in
            print("VALUES")
            print(groupData.values)
        }


    }

Answer 1

class ShowDetails {
    var startRideDateTime:String?
    var rideID:Int?
    var endRideDateTime:String?
    var totalKM:Double?
    var rides:Int?

    init(rideID: Int?,totalKM: Double?, startRideDateTime: String?, endRideDateTime: String?, rides: Int?) {
        self.rideID = rideID
        self.totalKM = totalKM
        self.startRideDateTime = startRideDateTime
        self.endRideDateTime = endRideDateTime
        self.rides = rides
    }
}

class myData {
    let date: String // this value should not be optional as you are sorting on basis of this
    let value: [ShowDetails]?

    init(date: String, value: [ShowDetails]?) {
        self.date = date
        self.value = value
    }
}

// set your data here
var data:[myData] = []

// this is the array sorted according to date
data.sort(by: { $0.date > $1.date })

Answer 2

使用 Codable 进行数据解析，然后根据日期对其进行排序。

您可以使用的模型，

struct Root: Decodable {
    var data: [Model]
}

struct Model: Decodable {
    let date: String
    let val: [Ride]
}

struct Ride: Decodable {
    let rideId: Int
    let date: String
    let totalKm: Double?
    let startTime: String
    let endTime: String
}

现在，像这样解析数据，

do {
    let decoder = JSONDecoder()
    decoder.keyDecodingStrategy = .convertFromSnakeCase
    var response = try decoder.decode(Root.self, from: data)
    response.data.sort { $0.date < $1.date }
    print(response)
} catch {
    print(error)
}

在上面的代码中，使用response 作为你的tableView's dataSource。

Answer 3

因此，如果有人需要，我找到了 Ans 的解决方案： 最后将数据保存到类模型中后，您可以将此代码添加到排序中。

func groupingByDate()
        {
            let groupData = Dictionary(grouping: self.showDetailsArray){ (element) -> String in
                return (element.startRideDate ?? "") //It fetches the element from model class array and set as key of dictionary and other elements as values
            }


            groupData.keys.forEach { (key) in

                let values = groupData[key]
                twoDArray.append(values ?? []) //twoDArray is a two dimensional Array           
            }
               //reloadTableview if you want
        }