Ios 使用Swift按字母顺序对TableView单元格排序

我正在使用firebase将数据加载到tableview单元格中，下面是我的数据结构

struct postStruct {
let title : String!
let author : String!
let bookRefCode : String!
let imageDownloadString : String!
let status : String!
let reserved : String!
let category : String!
let dueDate : String!
}

现在，我需要按字母顺序对包含数据的tableview单元格进行排序，标题顶部以A开头，底部以Z开头

class DirectoryTableView: UITableViewController {

var posts = [postStruct]()

override func viewDidLoad() {

let databaseRef = Database.database().reference()

databaseRef.child("Books").queryOrderedByKey().observe(.childAdded, with: {
    snapshot in

    var snapshotValue = snapshot.value as? NSDictionary
    let title = snapshotValue!["title"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let author = snapshotValue!["author"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let bookRefCode = snapshotValue!["bookRefCode"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let status = snapshotValue!["status"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let reserved = snapshotValue!["reserved"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let category = snapshotValue!["category"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let dueDate = snapshotValue!["dueDate"] as? String
    snapshotValue = snapshot.value as? NSDictionary


    self.posts.insert(postStruct(title: title, author: author, bookRefCode: bookRefCode, status: status, reserved: reserved, category: category, dueDate: dueDate) , at: 0)
    self.tableView.reloadData()


})



 override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

return posts.count

 }




  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

var cell = tableView.dequeueReusableCell(withIdentifier: "cell")

let databaseRef = Database.database().reference()

let label1 = cell?.viewWithTag(1) as! UILabel
label1.text = posts[indexPath.row].title

let label2 = cell?.viewWithTag(2) as! UILabel
label2.text = posts[indexPath.row].author

let label3 = cell?.viewWithTag(3) as! UILabel
label3.text = posts[indexPath.row].bookRefCode

let label4 = cell?.viewWithTag(4) as! UILabel
label4.text = posts[indexPath.row].status

let label5 = cell?.viewWithTag(5) as! UILabel
label5.text = posts[indexPath.row].category

let image1 = cell?.viewWithTag(6) as! UILabel
image1.text = posts[indexPath.row].imageDownloadString

let label6 = cell?.viewWithTag(7) as! UILabel
label6.text = posts[indexPath.row].reserved

let label9 = cell?.viewWithTag(9) as! UILabel
label9.text = posts[indexPath.row].dueDate

return cell!

}

任何想法，请帮助！

---

我试着用不同的方法对它们进行分类，但我感到困惑

正如我在评论中所说，您不需要对单元格进行排序，而需要对数据源数组进行排序，要做到这一点，请在您的

self.posts.insert（postStruct）下面添加此行
self.posts.sort（by:{$0.title
（标题：title，作者：author，bookRefCode:bookRefCode，状态：status，reserved:reserved，category:category，dueDate:dueDate），地址：0）

添加此行后，您的帖子数组将保持有序，并且每次添加另一篇帖子时都将再次排序

您的视图加载带有排序的完整代码

override func viewDidLoad() {

let databaseRef = Database.database().reference()

databaseRef.child("Books").queryOrderedByKey().observe(.childAdded, with: {
    snapshot in

    var snapshotValue = snapshot.value as? NSDictionary
    let title = snapshotValue!["title"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let author = snapshotValue!["author"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let bookRefCode = snapshotValue!["bookRefCode"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let status = snapshotValue!["status"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let reserved = snapshotValue!["reserved"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let category = snapshotValue!["category"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let dueDate = snapshotValue!["dueDate"] as? String
    snapshotValue = snapshot.value as? NSDictionary


    self.posts.insert(postStruct(title: title, author: author, bookRefCode: bookRefCode, status: status, reserved: reserved, category: category, dueDate: dueDate) , at: 0)
    self.posts.sort(by: {$0.title < $1.title})
    self.tableView.reloadData()


})

override func viewDidLoad（）{
让databaseRef=Database.Database（）.reference（）
databaseRef.child（“Books”）.queryOrderedByKey（）.observe（.childAdded，带有：{
快照
var snapshotValue=snapshot.value作为NSDictionary
让title=snapshotValue！[“title”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让author=snapshotValue！[“author”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让bookRefCode=snapshotValue！[“bookRefCode”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让status=snapshotValue！[“status”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让reserved=snapshotValue！[“reserved”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让category=snapshotValue！[“category”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让dueDate=snapshotValue！[“dueDate”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
self.posts.insert（postStruct（标题：标题，作者：作者，bookRefCode:bookRefCode，状态：状态，保留：保留，类别：类别，dueDate:dueDate），地址：0）
self.posts.sort（按：{$0.title<$1.title}）
self.tableView.reloadData（）
})

正如我在评论中所说，您不需要对单元格进行排序，而需要对数据源数组进行排序，要做到这一点，请在您的

self.posts.insert（postStruct）下面添加此行
self.posts.sort（by:{$0.title<$1.title}）
（标题：title，作者：author，bookRefCode:bookRefCode，状态：status，reserved:reserved，category:category，dueDate:dueDate），地址：0）

添加此行后，您的帖子数组将保持有序，并且每次添加另一篇帖子时都将再次排序

您的视图加载带有排序的完整代码

override func viewDidLoad() {

let databaseRef = Database.database().reference()

databaseRef.child("Books").queryOrderedByKey().observe(.childAdded, with: {
    snapshot in

    var snapshotValue = snapshot.value as? NSDictionary
    let title = snapshotValue!["title"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let author = snapshotValue!["author"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let bookRefCode = snapshotValue!["bookRefCode"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let status = snapshotValue!["status"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let reserved = snapshotValue!["reserved"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let category = snapshotValue!["category"] as? String
    snapshotValue = snapshot.value as? NSDictionary

    let dueDate = snapshotValue!["dueDate"] as? String
    snapshotValue = snapshot.value as? NSDictionary


    self.posts.insert(postStruct(title: title, author: author, bookRefCode: bookRefCode, status: status, reserved: reserved, category: category, dueDate: dueDate) , at: 0)
    self.posts.sort(by: {$0.title < $1.title})
    self.tableView.reloadData()


})

override func viewDidLoad（）{
让databaseRef=Database.Database（）.reference（）
databaseRef.child（“Books”）.queryOrderedByKey（）.observe（.childAdded，带有：{
快照
var snapshotValue=snapshot.value作为NSDictionary
让title=snapshotValue！[“title”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让author=snapshotValue！[“author”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让bookRefCode=snapshotValue！[“bookRefCode”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让status=snapshotValue！[“status”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让reserved=snapshotValue！[“reserved”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让category=snapshotValue！[“category”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
让dueDate=snapshotValue！[“dueDate”]作为？字符串
snapshotValue=snapshot.value作为NSDictionary
self.posts.insert（postStruct（标题：标题，作者：作者，bookRefCode:bookRefCode，状态：状态，保留：保留，类别：类别，dueDate:dueDate），地址：0）
self.posts.sort（按：{$0.title<$1.title}）
self.tableView.reloadData（）
})

您不需要对单元格进行排序，而需要对数据源数组进行排序我该如何对数据源数组进行排序？您不需要对单元格进行排序，而需要对数据源数组进行排序我该如何对数据源数组进行排序？您知道如何将所有以A开头的单元格都放在一个部分中，然后将它们自己和B放在一个部分中吗，还有Cs，等等？我会检查一下，但是你可以发布一个关于这个@joeyhal的问题，你知道如何把所有以A开头的，然后把它们自己放在一个部分，还有Bs，Cs，等等吗？我会检查一下，但是你可以发布一个关于这个@joeyhal的问题