Hey All,
I have a table which i fill using a json request. On scroll a new request is done and new items get loaded. I would like these new items to be placed underneath the current items. My current code just refreshes the tableview thus deleting the current content.
Basicly i first load a few results in my table. on scroll i send another json request which gives me a few new results. I want to load these results inside the tableview. How can i keep the first results visible inside my table? A reload just shows the last request, this is because mydata3 is overwritten. How can i append the data inside mydata3 or can i achieve the same result another way?
I thought i would be able to fix this the following way but this gives me an error:
Cannot convert value of type '[SearchController.MyTableCell]' to expected argument type 'SearchController.MyTableCell'
var mydata4(self.mydata3)
self.mydata3 = response.resultcomp.map { value in
MyTableCell(
comp: value.comp,
comments: value.comments,
staravg: value.staravg,
maxkm: value.maxkm,
firstname: value.firstname,
compid: value.compid,
lastname: value.lastname,
createdon: value.createdon,
city: value.city,
functions: value.functions,
user: value.user,
version: value.version,
picture: value.picture,
xrefid: value.xrefid
)
}
mydata4.append(mydata3)import Foundation
import UIKit
class ResultsComp: Codable {
let resultcomp: [Resultcomp]
init(resultcomp: [Resultcomp]) {
self.resultcomp = resultcomp
}
}
class Resultcomp: Codable {
let staravg, maxkm, firstname, compid: String
let lastname, comments, createdon, city: String
let functions, user, comp, picture, version: String
let xrefid: String
init(staravg: String, maxkm: String, firstname: String, compid: String, lastname: String, comments: String, createdon: String, city: String, functions: String, user: String, comp: String, picture: String, version: String, xrefid: String) {
self.staravg = staravg
self.maxkm = maxkm
self.firstname = firstname
self.compid = compid
self.lastname = lastname
self.comments = comments
self.createdon = createdon
self.city = city
self.functions = functions
self.user = user
self.comp = comp
self.picture = picture
self.version = version
self.xrefid = xrefid
}
}
class SearchController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITableViewDelegate, UITableViewDataSource, UIScrollViewDelegate {
var myVar:String = ""
struct MyTableCell {
let comp: String?
let comments: String?
let staravg: String?
let maxkm: String?
let firstname: String?
let compid: String?
let lastname: String?
let createdon: String?
let city: String?
let functions: String?
let user: String?
let version: String?
let picture: String?
let xrefid: String?
}
var mydata3 = [MyTableCell]()
var mycellID3 = "mycellID3"
var data2: [AnyObject] = []
var data: [AnyObject] = []
lazy var scrollView: UIScrollView = {
let view = UIScrollView()
view.translatesAutoresizingMaskIntoConstraints = false
view.contentSize.height = 1200
view.backgroundColor = UIColor.white
return view
}()
let mainMenu: UIButton = {
let image = UIImage(named: "menu.PNG")
let l = UIButton(type: .system)
l.addTarget(self ,action: #selector(openMenu), for: .touchUpInside)
l.setBackgroundImage(image, for: .normal)
return l
}()
let categorieLabel: UILabel = {
let t = UILabel()
t.font = UIFont.boldSystemFont(ofSize: 24.0)
t.textColor = yellowBanner
return t
}()
let categorieDropdown: UITextView = {
let t = UITextView()
t.font = UIFont.boldSystemFont(ofSize: 16.0)
t.backgroundColor = orangeBanner
t.textColor = UIColor.white
t.contentInset = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 5);
return t
}()
let categorieDropdown2: UITextView = {
let t = UITextView()
t.text = "Subcategorie"
t.font = UIFont.boldSystemFont(ofSize: 16.0)
t.backgroundColor = .white
t.textColor = UIColor.black
t.layer.borderWidth = 1.0;
t.contentInset = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 5);
return t
}()
let filterButton: UIButton = {
let h = UIButton()
h.setTitle("Kies meer filters > ", for: .normal)
h.setTitleColor(UIColor.black, for: .normal)
h.contentHorizontalAlignment = UIControl.ContentHorizontalAlignment.left
h.titleLabel?.font = h.titleLabel?.font.withSize(24)
return h
}()
let underFilter=UIView()
var picker = UIPickerView()
var picker2 = UIPickerView()
let comptable2: UITableView = {
let m = UITableView()
m.backgroundColor = UIColor.white
m.separatorStyle = .none
return m
}()
var isDataLoading:Bool=false
var pageNo:Int=1
var limit:Int=5
var offset:Int=0 //pageNo*limit
var didEndReached:Bool=false
override func viewDidLoad() {
super.viewDidLoad()
setupScrollView()
view.backgroundColor = .white
picker.delegate = self
picker.dataSource = self
picker2.delegate = self
picker2.dataSource = self
categorieDropdown.inputView = picker
categorieDropdown2.inputView = picker2
comptable2.rowHeight = UITableView.automaticDimension
comptable2.estimatedRowHeight = 200
comptable2.register(SearchCell.self, forCellReuseIdentifier: mycellID3)
comptable2.delegate = self
comptable2.dataSource = self
DispatchQueue.main.async
{
self.categorieLabel.text = self.myVar
self.categorieDropdown.text = self.myVar
}
let myUrl = URL(string: "https://myurl/myurl");
var request = URLRequest(url:myUrl!)
request.httpMethod = "POST"// Compose a query string
let accessToken: String? = KeychainWrapper.standard.string(forKey: "token")
let userId: String? = KeychainWrapper.standard.string(forKey: "id")
let postString = "userId=\(userId!)&token=\(accessToken!)&pages=1";
request.httpBody = postString.data(using: String.Encoding.utf8);
let task = URLSession.shared.dataTask(with: request) { (data3: Data?, response: URLResponse?, error: Error?) in
if error != nil
{
print("error=\(String(describing: error))")
return
}
do {
let json = try JSONSerialization.jsonObject(with: data3!, options: .mutableContainers) as? NSDictionary
let test = "yes"
let test2 = json!["showmore"]! as! String
if test2 == test {
let decoder = JSONDecoder()
let response = try decoder.decode(ResultsComp.self, from: data3!)
self.mydata3 = response.resultcomp.map { value in
MyTableCell(
comp: value.comp,
comments: value.comments,
staravg: value.staravg,
maxkm: value.maxkm,
firstname: value.firstname,
compid: value.compid,
lastname: value.lastname,
createdon: value.createdon,
city: value.city,
functions: value.functions,
user: value.user,
version: value.version,
picture: value.picture,
xrefid: value.xrefid
)
}
DispatchQueue.main.async
{
self.comptable2.reloadData()
}}
} catch {
print(error)
}
}
task.resume()
}
private func setupScrollView(){
view.addSubview(scrollView)
scrollView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
scrollView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
scrollView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
scrollView.keyboardDismissMode = .onDrag
scrollView.isScrollEnabled = true
// Do any additional setup after loading the view
let imageView = UIImageView(frame: CGRect(x: 10, y: 5, width: 150, height: 50))
imageView.image = UIImage(named: "main.PNG")
scrollView.addSubview(imageView)
scrollView.addSubview(mainMenu)
mainMenu.translatesAutoresizingMaskIntoConstraints = false
mainMenu.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 5).isActive = true
mainMenu.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
mainMenu.heightAnchor.constraint(equalToConstant: 50).isActive = true
mainMenu.widthAnchor.constraint(equalToConstant: 50).isActive = true
view.addSubview(categorieLabel)
categorieLabel.translatesAutoresizingMaskIntoConstraints = false
categorieLabel.topAnchor.constraint(equalTo: mainMenu.bottomAnchor, constant: 15).isActive = true
categorieLabel.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
categorieLabel.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
categorieLabel.heightAnchor.constraint(equalToConstant: 50).isActive = true
view.addSubview(categorieDropdown)
categorieDropdown.translatesAutoresizingMaskIntoConstraints = false
categorieDropdown.topAnchor.constraint(equalTo: categorieLabel.bottomAnchor, constant: 15).isActive = true
categorieDropdown.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
categorieDropdown.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
categorieDropdown.heightAnchor.constraint(equalToConstant: 50).isActive = true
view.addSubview(categorieDropdown2)
categorieDropdown2.translatesAutoresizingMaskIntoConstraints = false
categorieDropdown2.topAnchor.constraint(equalTo: categorieDropdown.bottomAnchor, constant: 15).isActive = true
categorieDropdown2.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
categorieDropdown2.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
categorieDropdown2.heightAnchor.constraint(equalToConstant: 50).isActive = true
view.addSubview(filterButton)
filterButton.translatesAutoresizingMaskIntoConstraints = false
filterButton.topAnchor.constraint(equalTo: categorieDropdown2.bottomAnchor, constant: 15).isActive = true
filterButton.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
filterButton.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
filterButton.heightAnchor.constraint(equalToConstant: 50).isActive = true
view.addSubview(underFilter)
underFilter.translatesAutoresizingMaskIntoConstraints = false
underFilter.topAnchor.constraint(equalTo: filterButton.bottomAnchor, constant: 15).isActive = true
underFilter.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
underFilter.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
underFilter.heightAnchor.constraint(equalToConstant: 2).isActive = true
underFilter.backgroundColor=grayBanner
// Add rounded corners to UIView
underFilter.layer.cornerRadius=0
view.addSubview(comptable2)
comptable2.translatesAutoresizingMaskIntoConstraints = false
comptable2.topAnchor.constraint(equalTo: underFilter.bottomAnchor, constant: 15).isActive = true
comptable2.leftAnchor.constraint(equalTo: view.leftAnchor, constant: 16).isActive = true
comptable2.rightAnchor.constraint(equalTo: view.rightAnchor, constant: -16).isActive = true
comptable2.heightAnchor.constraint(equalToConstant: 580).isActive = true
}
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
print("scrollViewWillBeginDragging")
isDataLoading = false
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let myUrl = URL(string: "https://myurl/myurl.php");
var request = URLRequest(url:myUrl!)
request.httpMethod = "POST"// Compose a query string
let accessToken: String? = KeychainWrapper.standard.string(forKey: "token")
let userId: String? = KeychainWrapper.standard.string(forKey: "id")
let postString = "userId=\(userId!)&token=\(accessToken!)&pages=\(pageNo)";
request.httpBody = postString.data(using: String.Encoding.utf8);
let task = URLSession.shared.dataTask(with: request) { (data3: Data?, response: URLResponse?, error: Error?) in
if error != nil
{
print("error=\(String(describing: error))")
return
}
do {
let json = try JSONSerialization.jsonObject(with: data3!, options: .mutableContainers) as? NSDictionary
let test = "yes"
let test2 = json!["showmore"]! as! String
if test2 == test {
let decoder = JSONDecoder()
let response = try decoder.decode(ResultsComp.self, from: data3!)
var mydata4 = self.mydata3
self.mydata3 = response.resultcomp.map { value in
MyTableCell(
comp: value.comp,
comments: value.comments,
staravg: value.staravg,
maxkm: value.maxkm,
firstname: value.firstname,
compid: value.compid,
lastname: value.lastname,
createdon: value.createdon,
city: value.city,
functions: value.functions,
user: value.user,
version: value.version,
picture: value.picture,
xrefid: value.xrefid
)
}
DispatchQueue.main.async
{
self.comptable2.reloadData()
}
}
} catch {
print(error)
}
}
task.resume()
}
//Pagination
func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
print("scrollViewDidEndDragging")
if ((comptable2.contentOffset.y + comptable2.frame.size.height) >= comptable2.contentSize.height)
{
if !isDataLoading{
isDataLoading = true
self.pageNo=self.pageNo+1
}
}
}
@objc func openMenu(){
let menu = MenuController()
present(menu, animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return mydata3.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let mycell = self.comptable2.dequeueReusableCell(withIdentifier: mycellID3) as! SearchCell
mycell.functions = mydata3[indexPath.row].functions!
mycell.comments = mydata3[indexPath.row].comments!
mycell.comp = mydata3[indexPath.row].comp!
mycell.picture = mydata3[indexPath.row].picture!
mycell.firstname = mydata3[indexPath.row].firstname!
mycell.lastname = mydata3[indexPath.row].lastname!
return mycell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
let a: Int! = Int(mydata3[indexPath.row].xrefid!)
let myVar = "\(a!)"
let test = AdvancedDescription()
test.myVar = myVar
present(test, animated: true, completion: nil)
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if pickerView == picker {
return data.count
}else{
return data2.count
}
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerView == picker {
categorieDropdown.text = " \(data[row] as! String)"
categorieDropdown2.text = "Maak een selectie"
let myvar = "https://gipaa.nl/app/comp_json2.php?comp=\(categorieDropdown.text!)"
let escapedAddress = myvar.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
let url = NSURL(string: escapedAddress!)
let data2 = NSData(contentsOf: url! as URL)
var tmpValues = try! JSONSerialization.jsonObject(with: data2! as Data, options: JSONSerialization.ReadingOptions.mutableContainers) as! NSArray
tmpValues = tmpValues.reversed() as NSArray
reloadInputViews()
self.data2.removeAll()
for candidate in tmpValues {
if let cdict = candidate as? NSDictionary {
//fullName is the column name in sql/json
let names = cdict["name"]
self.data2.append(names! as AnyObject)
}
}
}else {
categorieDropdown2.text = data2[row] as? String
}
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if pickerView == picker {
return data[row] as? String
}else{
return data2[row] as? String
}
}
