需要帮助按 Swift 中的时间戳对结构进行排序

Question

Trying to sort a Swift struct by timestamp and really need some help. My struct definition is as follows:

struct TripDetails {

  let tripDepartureTime: String
  var myLocations: [GeoPoint]
  var myDates: [Timestamp]

}

And in the variable todaysTrip is the following data:

TripDetails(
tripDepartureTime: "2020-05-23 22:56:52 +0000", 

myLocations: [<FIRGeoPoint: (21.561333, -80.033536)>, 
<FIRGeoPoint: (22.561288, -80.023592)>, 
<FIRGeoPoint: (20.561265, -80.063439)>], 

myDates: [<FIRTimestamp: seconds=1590274922 nanoseconds=795317000>, 
<FIRTimestamp: seconds=1590274802 nanoseconds=683353000>, 
<FIRTimestamp: seconds=1590274682 nanoseconds=679319000>])

I want to sort all the fields of the particular trip based on the times of the myDates timestamp in descending order. Been at it for awhile and can't figure out what I'm doing wrong. I've seen several posts here on StackOverflow dealing with this question but none of them seem to work in my case.

Answer 1

Suggest you to change structure of your model:

struct TripDetails {
    struct LocationInfo {
        var location: GeoPoint
        var timestamp: TimeStamp
    }

    let tripDepartureTime: String
    var locations: [LocationInfo]

} 

Sorting:

var tripDetails = ... // Getting model
tripDetails.locations.sort(by: { $0.timestamp.seconds > $1.timestamp.seconds })