如何按字母顺序从API排序JSON数组？

Question

I'm a newbie in programming world, especially Swift. Now I am using Swift 5 in Xcode. By following code below, I successfully get JSON data from API and put it in Table View. This data default sorted by "id". How to sort this data alphabetically based on "first_name" and put it in Table View?

// Model.swift
struct UserModel {
    var id: Int?
    var first_name: String?
    var last_name: String?

    init(data: JSON?) {
        self.id = data?["id"].int
        self.first_name = data?["first_name"].string
        self.last_name = data?["last_name"].string
    }
}

// UserViewController.swift
var users: [UserModel]?

// API Get result
switch result {
            case .success(let value):
                if let data = JSON(value).array {
                    self.users = data.map({ UserModel(data: $0) })
                }
                self.tableView.reloadData()
            case .failure(let error):
                print(error.localizedDescription)
            }

Answer 1

雨燕3＆雨燕4＆雨燕5

self.users.sorted(by: { $0.first_name < $1.first_name})

Answer 2

Sorting for array of object can be done using below code

self.users.sorted(by: {$0.first_name < $1.first_name})

Sorting for ignore case.

self.users.sorted(by: {$0.first_name.lowercased() < $1.first_name.lowercased()})

Answer 3

inorder to sort array struct in swift. you can simple do

self.users.sort(by: {$0.first_name < $1.first_name})

Answer 4

You can sort the users array using sort(by:) method like so,

users?.sort(by: { (user1, user2) -> Bool in
    if let name1 = user1.first_name, let name2 = user2.first_name {
        return name1 < name2
    }
    return false
})

sort(by:) sorts the collection in-place.

Sorts the collection in place, using the given predicate as the comparison between elements.

You can use sorted(by:) method for out-place sorting.

Returns the elements of the sequence, sorted using the given predicate as the comparison between elements.