Swift - How can I group value array (from dictonary) to multiple section - swift

Question

I am a beginner in Swift. How can I group array list from dictionary? I tried, but it show all list into one section. I can't group, list, sort and show list by the same group.
Image 1
But I can do like this,
Image 2
Here's the code for Todolist array
import Foundation
import Firebase
import FirebaseDatabase
struct TodoList {
var title:String!
var content:String!
var username:String!
var dateLabel:String!
var ref : FIRDatabaseReference?
var key: String!
var picNoteStringUrl : String!
var userImageViewStringUrl : String!
var postId: String!
init(title:String,content:String,username:String,picNoteStringUrl : String,userImageViewStringUrl : String,postId: String,dateLabel:String,key:String="") {
self.title=title
self.content=content
self.username = username
self.dateLabel = dateLabel
self.key=key
self.userImageViewStringUrl = userImageViewStringUrl
self.picNoteStringUrl = picNoteStringUrl
self.postId = postId
self.ref=FIRDatabase.database().reference()
}
init(snapshot:FIRDataSnapshot) {
let value = snapshot.value as? [String: AnyObject]
title = value?["title"] as! String
content = value?["content"] as! String
username = value?["username"] as! String
postId = value?["postId"] as! String
picNoteStringUrl = value?["picNoteStringUrl"] as! String
userImageViewStringUrl = value?["userImageViewStringUrl"] as! String
dateLabel = value?["dateLabel"] as! String
key = snapshot.key
ref = snapshot.ref
}
func toAnyObject() -> [String: AnyObject] {
return ["title": title as AnyObject, "content": content as AnyObject,"username": username as AnyObject,"picNoteStringUrl":picNoteStringUrl as AnyObject,"userImageViewStringUrl": userImageViewStringUrl as AnyObject,"postId":postId as AnyObject,"dateLabel" : dateLabel as AnyObject]
}
}
And here's my code for TableViewController
class TodoListTableViewController: UITableViewController{
var storageRef: FIRStorageReference!
var databaseRef : FIRDatabaseReference!
var todoArray:[TodoList] = []
override func viewDidLoad() {
super.viewDidLoad()
if FIRAuth.auth()?.currentUser==nil{
let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "Home")
self.present(vc,animated: true,completion: nil)
}
else{
let uid = FIRAuth.auth()?.currentUser?.uid
let databaseRef = FIRDatabase.database().reference().child("allTasks").child(uid!)
databaseRef.observe(.value, with: { (snapshot) in
var newItems = [TodoList]()
for item in snapshot.children {
let newTodo = TodoList(snapshot: item as! FIRDataSnapshot)
let letter = newTodo.dateLabel
newItems.insert(newTodo, at: 0)
}
self.todoArray = newItems
DispatchQueue.main.async(execute: {
self.tableView.reloadData()
})
}) { (error) in
print(error.localizedDescription)
}
}
}
override func numberOfSections(in tableView: UITableView) -> Int {
return todoArray.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let todoLine = todoArray[section]
return todoArray.count
}
override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
let todoLine = todoArray[section]
return todoLine.dateLabel
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TodoTableViewCell
cell.todoItemName.text = self.todoArray[indexPath.row].title
cell.todoDescription.text = self.todoArray[indexPath.row].content
cell.usernameLabel.text = self.todoArray[indexPath.row].username
let picNoteStringUrl = self.todoArray[indexPath.row].picNoteStringUrl
let userImageViewStringUrl = self.todoArray[indexPath.row].userImageViewStringUrl
FIRStorage.storage().reference(forURL: picNoteStringUrl!).data(withMaxSize: 10 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async(execute: {
if let picNoteStringUrl = UIImage(data:data!) {
cell.picNote.image = picNoteStringUrl
print("testpass",picNoteStringUrl)
}
})
}else {
print(error!.localizedDescription,"555")
}
})
FIRStorage.storage().reference(forURL: userImageViewStringUrl!).data(withMaxSize: 10 * 1024 * 1024, completion: { (data, error) in
if error == nil {
DispatchQueue.main.async(execute: {
if let userImageViewStringUrl = UIImage(data:data!) {
cell.userImageView.image = userImageViewStringUrl
print("testpass",userImageViewStringUrl)
}
})
}else {
print(error!.localizedDescription,"555")
}
})
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath:IndexPath) -> [UITableViewRowAction]? {
let delete = UITableViewRowAction(style: .default, title: "\u{267A}\n Delete") { action, index in
print("more button tapped")
let ref = self.todoArray[indexPath.row].ref
ref?.removeValue()
self.todoArray.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
}
delete.backgroundColor = UIColor.red
let check = UITableViewRowAction(style: .default, title: "\u{2611}\n check") { action, index in
print("edit button tapped")
}
check.backgroundColor = UIColor.orange
return [check, delete]
}
}
}
}

Answer 1

You have to organize your data by section first. I don't see that happening since you simply add all received items into one array.
Based on the screenshot you have provided and the project, it looks as if you are trying to display todo items by date where each section is for a different date. And as far as I can tell, your date value is in the dateLabel property.
If all of the above is correct, then you would need to convert the dateLabel property, which is a String, to an actual Date value so that you can work with the individual dates. Or, depending on how the date string is set up, you might be able to do the same thing by getting just the date component of the string. For example, if your date strings are like "2017-03-31 10:55am" or something, just getting the "2017-03-31" part should allow you to organize the todo items so that all items for the same date can be easily identified.
Once you do that, you have to set up some sort of a structure - if you go with date strings, then a dictionary might work - where you can identify all todo items for a given date. For example, if you have just the date extracted as a string (like "2017-03-31") then you could set up something like this:
var dates = [String]()
var todoItems = [String:[TodoList]]()
The above means that for one string value (which would be a date), you'd have an array of TodoList items. The dates array would be just a convenience so that you can sort the date strings the way you want.
Once you have that, you can modify your table delegate methods to get the count of items in dates to get the sections and the relevant TodoList for each row. Like this:
override func numberOfSections(in tableView: UITableView) -> Int {
return dates.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let date = dates[section]
let array = todoItems[date]
return array.count
}
Hopefully, the above makes sense :)