This is the data model I used to import a json file.
struct ActionResult: Codable {
let data: [Datum]
}
struct Datum: Codable {
let goalTitle, goalDescription, goalImage: String
let action: [Action]
}
struct Action: Codable {
let actionTitle: String
let actionGoal: String
Now I am trying to create a searchbar, but it only searches in one section, although I have not defined a section in the data model but it is picking either the goalTitle or actionGoal.
var index = 0
var action: Action? // this is for the segue
var result: ActionResult? {
didSet {
guard let result = result else { return }
allSectionDataActionMap = Dictionary(uniqueKeysWithValues: result.data.enumerated().map { ($0.0, ($0.1, $0.1.action)) })
updateFilteredData()
}
}
var allSectionDataActionMap = [Int: (datum: Datum, actions: [Action])]()
// Maps the section index to the Datum & filtered [Action]
var filteredSectionDataActions = [Int: (datum: Datum, actions: [Action])]()
let searchController = UISearchController()
This is part of the setup code.
override func numberOfSections(in tableView: UITableView) -> Int {
return filteredSectionDataActions.count
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredSectionDataActions[section]?.actions.count ?? 0
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = ActionTableView.dequeueReusableCell(withIdentifier: "ActionCell", for: indexPath) as! ActionTableCell
let action = filteredSectionDataActions[indexPath.section]?.actions[indexPath.row]
// setup cell for action
cell.actionItem.text = action?.actionTitle
cell.actionImage.image = UIImage(named: action!.actionImage)
cell.actionImage.layer.cornerRadius = cell.actionImage.frame.size.width / 2
cell.actionGoal.text = action?.actionGoal
// cell.actionBenefit.text = action?.actionBenefit
// cell.actionCalculator.text = action?.actionCalculator
This is the table view code
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
updateFilteredData(for: searchText.lowercased())
tableView.reloadData()
}
func updateFilteredData(for searchText: String = String()) {
if searchText.isEmpty {
filteredSectionDataActions = allSectionDataActionMap
} else {
for (index, (datum, actions)) in allSectionDataActionMap {
let filteredActions = actions.filter { $0.actionTitle.lowercased().contains(searchText) }
if filteredActions.isEmpty {
filteredSectionDataActions[index] = (datum, actions)
} else {
filteredSectionDataActions[index] = (datum, filteredActions)
}
This is for the searchbar.
Related
I after asking another question today and fixed my Swift 4.2 code, I realized that I can't debug the app because of some profiles.
Errors shown when Testing application
The app also crashes on launch so there is not much I can do for now. I believe that the issue is how I am getting the information from the webserver (currently my computer). I am quite new to this, so i might have some mistakes in my code, so bear with me.
import UIKit
class InfoTableViewController: UITableViewController {
//MARK: Properties
class Produs {
var nume: String!
var codBare: String!
init(nume: String, codBare: String) {
self.nume = nume
self.codBare = codBare
}
}
var produse = [Produs]()
override func viewDidLoad() {
super.viewDidLoad()
//Load elements from server, theoretically
loadProducts()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return produse.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Table view cells are reused and should be dequeued using a cell identifier.
let cellIdentifier = "InfoTableViewCell"
guard let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as? InfoTableViewCell else {
fatalError("The dequeued cell is not an instance of InfoTableViewCell.")
}
// Fetches the appropriate meal for the data source layout.
let produs = produse[indexPath.row]
cell.nameMain.text = produs.nume
cell.nameInfo.text = produs.codBare
return cell
}
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
//MARK: Private Methods
private func loadProducts() { //This function retrieves information in a JSON format from the server
var request = URLRequest(url: URL(string: "192.168.0.145")!)
request.httpMethod = "GET"
URLSession.shared.dataTask(with: request, completionHandler: { data, response, error -> Void in
do {
let decoder = JSONDecoder()
let json = try decoder.decode([[String]].self, from: data!)
print(json)
for produs in json {
print(produs)
var nume_prod: String = produs[0] // Numele produsului
var cod_ext: String = produs[1] // Codul de bare al produsului
var prod_obj = Produs(nume: nume_prod, codBare: cod_ext)
self.produse.append(prod_obj)
}
} catch {
print("JSON Serialization error")
}
}).resume()
}
}
I am getting the information from the server in a JSON file that is an array of arrays and looks like this:
[
[
"product1",
"code1"
],
[
"product2",
"code2"
],
[
"product3",
"code3"
]
]
Thank you for your help!
Don't send the JSON as array of arrays, send it as array of dictionaries. It simplifies the decoding considerably.
[
{"name":"product1", "code":"code1"},
{"name":"product2", "code":"code2"},
{"name":"product3", "code":"code3"}
]
Then declare the model as struct and never declare properties as implicit unwrapped optional which are initialized with non-optional values. If you need optionals declare them as regular optional (?) otherwise non-optional
struct Produs {
let name: String
let code: String
}
Replace loadProducts with
private func loadProducts() { //This function retrieves information in a JSON format from the server
let url = URL(string: "192.168.0.145")!
URLSession.shared.dataTask(with: url, completionHandler: {[unowned self] data, response, error in
if let error = error { print(error); return }
do {
self.produse = try JSONDecoder().decode([Produs].self, from: data!)
print(self.produse)
DispatchQueue.main.async {
self.tableView.reloadData()
}
} catch {
print(error)
}
}).resume()
}
And replace cellForRowAt with
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cellIdentifier = "InfoTableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! InfoTableViewCell
// Fetches the appropriate meal for the data source layout.
let produs = produse[indexPath.row]
cell.nameMain.text = produs.name
cell.nameInfo.text = produs.code
return cell
}
I have table view like this (in a mac cocoa application):
In the leftmost panel you can see that I have set the identifier of the Table Cell View to "1". That's fine if you just have 2 columns, once the number goes up, this approach will become cumbersome. Can I do this programmatically?
Here is an example:
import Cocoa
class ViewController: NSViewController, NSTableViewDelegate, NSTableViewDataSource {
private var dataModel = DataModel()
private var answer = 0
private var keyData: (Int, [Int]) = (0, []) {
didSet {
tbl.reloadData()
}
}
#IBOutlet weak var questionIndex: NSTextField!
#IBOutlet weak var tbl: NSTableView!
#IBAction func replay(_ sender: Any) {
dataModel = DataModel()
questionIndex.stringValue = "0:"
answer = 0
updateModel()
}
#IBAction func forward(_ sender: NSButton) {
if sender.tag == 1 {
answer += keyData.0
}
updateModel()
}
func updateModel() {
let group = dataModel.nextGroup()
if let g = group {
self.keyData = g
let s = questionIndex.stringValue
questionIndex.stringValue = String(Int(String(s.characters.dropLast()))! + 1) + ":"
return
}
let alert = NSAlert()
alert.messageText = "You did have \(answer) on your mind, didn't you?"
alert.runModal()
}
override func viewDidLoad() {
super.viewDidLoad()
for (n, col) in tbl.tableColumns.enumerated() {
col.identifier = String(n)
}
updateModel()
}
func numberOfRows(in tableView: NSTableView) -> Int {
return keyData.1.count / 8 + 1
}
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
let colId = tableColumn!.identifier
let colIndex = Int(colId)!
let index = (row * 8) + colIndex
let cell = tbl.make(withIdentifier: colId, owner: self) as! NSTableCellView
if 0 <= index && index < keyData.1.count {
cell.textField!.integerValue = keyData.1[index]
} else {
cell.textField!.stringValue = ""
}
return cell
}
override var representedObject: Any? {
didSet {
// Update the view, if already loaded.
}
}
}
I have assigned the cell identifiers by hand, and made them identical the corresponding column index, so as to creating a mapping between the cell id and the 2D array (which is the underlying data model) column index. The app is running fine, I just don't like assigning these IDs by click-and-point.
The full project can be found here: https://github.com/kindlychung/MysteriousNum
Create custom cell and add init to it using following lines.
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
and register this cell class as.
self.tableView.register(CustomCell.self, forCellReuseIdentifier: "customCell")
also dequeueReusableCell using same cell like:
tableView.dequeueReusableCell(withIdentifier: "customCell",for: indexPath) as! CustomCell
I am struggling to figure out how to implement a sectioned table view using parse. I am able to correctly section the table view if I don't load the names I want. However, when I use parse the names don't load in time and therefore are missed as it is async.
When I reload the table in queryFriends() it doesn't show up. My theory is that the table isn't sectioned again.
How do I make the table section again?
Or does anyone have any ideas?
Thanks for your help
import UIKit
import Parse
import Foundation
class MyFriendsTableView: UITableViewController, UITableViewDataSource, UITableViewDelegate{
var names:[String] = []
/*var names: [String] = [
"AAAA",
"Clementine",
"Bessie",
"Yolande",
"Tynisha",
"Ellyn",
"Trudy",
"Fredrick",
"Letisha",
"Ariel",
"Bong",
"Jacinto",
"Dorinda",
"Aiko",
"Loma",
"Augustina",
"Margarita",
"Jesenia",
"Kellee",
"Annis",
"Charlena",
"!##",
"###"
]*/
override func viewDidLoad() {
super.viewDidLoad()
self.refreshControl = UIRefreshControl()
self.refreshControl?.attributedTitle = NSAttributedString(string: "Pull to refresh")
self.refreshControl?.addTarget(self, action: "queryFriends", forControlEvents: UIControlEvents.ValueChanged)
self.tableView.addSubview(refreshControl!)
}
override func viewDidAppear(animated: Bool) {
UIApplication.sharedApplication().statusBarHidden = false
UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent
queryFriends()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func queryFriends() {
let currentUser = PFUser.currentUser()?.username
let predicate = NSPredicate(format: "status = 'Friends' AND fromUser = %# OR status = 'Friends' AND toUser = %#", currentUser!, currentUser!)
var query = PFQuery(className: "FriendRequest", predicate: predicate)
var friends:[String] = []
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = objects as? [PFObject] {
for object in objects {
if object["toUser"] as? String != currentUser {
friends.append(object["toUser"] as! String)
} else if object["fromUser"] as? String != currentUser {
friends.append(object["fromUser"] as! String)
}
}
}
} else {
// Log details of the failure
println("Error: \(error!) \(error!.userInfo!)")
}
self.names = friends
self.tableView.reloadData()
self.refreshControl?.endRefreshing()
}
}
/* type to represent table items
`section` stores a `UITableView` section */
class User: NSObject {
let name: String
var section: Int?
init(name: String) {
self.name = name
}
}
// custom type to represent table sections
class Section {
var users: [User] = []
func addUser(user: User) {
self.users.append(user)
}
}
// `UIKit` convenience class for sectioning a table
let collation = UILocalizedIndexedCollation.currentCollation()
as! UILocalizedIndexedCollation
// table sections
var sections: [Section] {
// return if already initialized
if self._sections != nil {
return self._sections!
}
// create users from the name list
var users: [User] = names.map { name in
var user = User(name: name)
user.section = self.collation.sectionForObject(user, collationStringSelector: "name")
return user
}
// create empty sections
var sections = [Section]()
for i in 0..<self.collation.sectionIndexTitles.count {
sections.append(Section())
}
// put each user in a section
for user in users {
sections[user.section!].addUser(user)
}
// sort each section
for section in sections {
section.users = self.collation.sortedArrayFromArray(section.users, collationStringSelector: "name") as! [User]
}
self._sections = sections
return self._sections!
}
var _sections: [Section]?
// table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return self.sections.count
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.sections[section].users.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let user = self.sections[indexPath.section].users[indexPath.row]
let cell = tableView.dequeueReusableCellWithIdentifier("UITableViewCell", forIndexPath: indexPath) as! UITableViewCell
cell.textLabel!.text = user.name
return cell
}
/* section headers
appear above each `UITableView` section */
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
// do not display empty `Section`s
if !self.sections[section].users.isEmpty {
return self.collation.sectionTitles[section] as? String
}
return ""
}
/* section index titles
displayed to the right of the `UITableView` */
override func sectionIndexTitlesForTableView(tableView: UITableView) -> [AnyObject] {
return self.collation.sectionIndexTitles
}
override func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
return self.collation.sectionForSectionIndexTitleAtIndex(index)
}
}
You can try to clear the _sections in queryFriends:
self._sections = nil
self.names = friends
self.tableView.reloadData()
self.refreshControl?.endRefreshing()
I am struggling to pass a variable received from a drag and drop (file from finder onto NSView) to a NSArrayController in AppDelegate.
NSView receives the drag and drop:
class MyView:NSView, NSDraggingDestination {
override func drawRect(dirtyRect: NSRect) {
super.drawRect(dirtyRect)
}
let fileTypes = ["jpg", "jpeg", "bmp", "tif", "TIF"]
var fileTypeIsOk = false
var droppedFilePath = ""
required init?(coder: NSCoder) {
let types = [NSFilenamesPboardType, NSURLPboardType, NSPasteboardTypeTIFF]
super.init(coder: coder)
registerForDraggedTypes(types)
}
override func draggingEntered(sender: NSDraggingInfo) -> NSDragOperation {
if checkExtension(sender) == true {
fileTypeIsOk = true
return .Every
} else {
fileTypeIsOk = false
println("Dropped images rejected.")
return .None
}
}
override func performDragOperation(sender: NSDraggingInfo) -> Bool {
var go = false
if let board = sender.draggingPasteboard().propertyListForType("NSFilenamesPboardType") as? NSArray {
for indexFile in 0...board.count-1 {
println("Files dropped \(board[indexFile])")
//-> pass the variable board[indexFile] or board[] to NSArrayController
go = true
}
}
return go
}
func checkExtension(drag: NSDraggingInfo) -> Bool {
var go = false
var foundExtension = 0
var numberOfFiles = 0
if let board = drag.draggingPasteboard().propertyListForType("NSFilenamesPboardType") as? NSArray {
numberOfFiles = board.count
for indexFile in 0...numberOfFiles-1 {
if let url = NSURL(fileURLWithPath: (board[indexFile] as! String)) {
let suffix = url.pathExtension!
for ext in fileTypes {
if ext.lowercaseString == suffix {
++foundExtension
break
}
}
}
}
}
if foundExtension == numberOfFiles {
println("Dropped files have valid extension.")
go = true
} else {
println("At least one file dropped has an invalid extension.")
}
return go
}
}
in AppDelegate, I have set up an NSArrayController (pointing to data[] at the moment but I don't know how to populate data[] from board[])
func numberOfRowsInTableView(aTableView: NSTableView) -> Int {
return data.count
}
func tableView(tableView: NSTableView, viewForTableColumn tableColumn: NSTableColumn?, row: Int) -> NSView? {
var cellView: NSTableCellView = tableView.makeViewWithIdentifier(tableColumn!.identifier, owner: self) as! NSTableCellView
println("Reload Array")
if tableColumn!.identifier == "fileNameColumn" {
cellView.imageView!.image = NSImage(named: "GreenCircle")
cellView.textField!.stringValue = data[row]
return cellView
}
...
thank you for your help
Call the "- (void)addObjects:(NSArray *)objects;" method on your NSArrayController and pass it board:
[self.myArrayController addObjects:board];
It worked by adding in NSView: performDragOperation:
let appDelegate = NSApplication.sharedApplication().delegate as! AppDelegate
then I can reach the 'data' variable using appDelegate.data.
I have implemented a basic example of an ios app using Realm.io
I'd like to be able to reorder table rows in my iOS app and save the order back to Realm.
Realm model contains a property called position for this purpose.
P.S: Sorry for so much code.
import UIKit
import Realm
class Cell: UITableViewCell {
var position: Int!
init(style: UITableViewCellStyle, reuseIdentifier: String!) {
super.init(style: .Subtitle, reuseIdentifier: reuseIdentifier)
}
}
class Language: RLMObject {
var title = ""
var position = Int()
}
class ManagerLanguagesController: UITableViewController, UITableViewDelegate, UITableViewDataSource {
var array = RLMArray()
var notificationToken: RLMNotificationToken?
var editButton = UIBarButtonItem()
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
notificationToken = RLMRealm.defaultRealm().addNotificationBlock { note, realm in
self.reloadData()
}
reloadData()
}
override func tableView(tableView: UITableView?, numberOfRowsInSection section: Int) -> Int {
return Int(array.count)
}
func setupUI() {
tableView.registerClass(Cell.self, forCellReuseIdentifier: "cell")
self.title = "Languages"
var addButton = UIBarButtonItem(barButtonSystemItem: .Add, target: self, action: "add")
editButton = UIBarButtonItem(title: "Edit", style: .Plain, target: self, action: "edit")
var buttons = [addButton, editButton]
self.navigationItem.rightBarButtonItems = buttons
}
func add() {
var addLanguageView:UIViewController = self.storyboard.instantiateViewControllerWithIdentifier("newLanguage") as UIViewController
self.navigationController.presentViewController(addLanguageView, animated: true, completion: nil)
}
func edit () {
if tableView.editing {
/* FROM THIS POINT I'M PROBABLY DOING SOMETHING WRONG.. IT IS NOT WORKING */
var positionArray = NSMutableArray()
let realm = RLMRealm.defaultRealm()
var i = 0
for var row = 0; row < tableView.numberOfRowsInSection(0); row++ {
var cellPath = NSIndexPath(forRow: row, inSection: 0)
var cell:Cell = tableView.cellForRowAtIndexPath(cellPath) as Cell
positionArray.addObject(cell.position)
}
realm.beginWriteTransaction()
for row: RLMObject in array {
row["position"] = positionArray[i]
i++
}
realm.commitWriteTransaction()
/* -- NOT WORKING END -- */
tableView.setEditing(false, animated: true)
editButton.style = UIBarButtonItemStyle.Plain
editButton.title = "Edit"
} else{
tableView.setEditing(true, animated: true)
editButton.title = "Done"
editButton.style = UIBarButtonItemStyle.Done
}
}
override func tableView(tableView: UITableView?, cellForRowAtIndexPath indexPath: NSIndexPath?) -> UITableViewCell? {
let cell = tableView!.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as Cell
let object = array[UInt(indexPath!.row)] as Language
cell.textLabel.text = object.title
cell.position = object.position // I have implemented this to be able to retain initial positions for each row and maybe use this when reordering..
return cell
}
override func tableView(tableView: UITableView!, canMoveRowAtIndexPath indexPath: NSIndexPath!) -> Bool {
return true
}
override func tableView(tableView: UITableView!, moveRowAtIndexPath sourceIndexPath: NSIndexPath!, toIndexPath destinationIndexPath: NSIndexPath!) {
// println("Old index: \(sourceIndexPath.indexAtPosition(sourceIndexPath.length - 1)+1)")
// println("New index: \(destinationIndexPath.indexAtPosition(sourceIndexPath.length - 1)+1)")
// Maybe something needs to be implemented here instead...
}
func reloadData() {
array = Language.allObjects().arraySortedByProperty("position", ascending: true)
tableView.reloadData()
}
}
Thanks in advance
Instead of using a position property, you could instead keep an ordered array as a property on another object. This way you don't have to keep the position up to date and instead arrange your objects as needed:
class Language: RLMObject {
dynamic var title = ""
}
class LanguageList: RLMObject {
dynamic var languages = RLMArray(objectClassName: "Language")
}
class ManagerLanguagesController: UITableViewController, UITableViewDelegate, UITableViewDataSource {
override func viewDidLoad() {
super.viewDidLoad()
// create our list
var realm = RLMRealm.defaultRealm()
realm.beginWriteTransaction()
realm.addObject(LanguageList())
realm.commitWriteTransaction()
...
}
// helper to get the RLMArray of languages in our list
func array() -> RLMArray {
return (LanguageList.allObjects().firstObject() as LanguageList).languages
}
override func tableView(tableView: UITableView!, moveRowAtIndexPath sourceIndexPath: NSIndexPath!, toIndexPath destinationIndexPath: NSIndexPath!) {
var languages = array()
var object = languages.objectAtIndex(UInt(sourceIndexPath.row)) as Language
var realm = RLMRealm.defaultRealm()
realm.beginWriteTransaction()
languages.removeObjectAtIndex(UInt(sourceIndexPath.row))
languages.insertObject(object, atIndex: UInt(destinationIndexPath.row))
realm.commitWriteTransaction()
}
...
}
this work for me to move rows in tableview using realm with swift 2.2:
func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
let aux = TimesHome.mutableCopy() as! NSMutableArray
let itemToMove = aux[fromIndexPath.row]
let realm = try! Realm()
realm.beginWrite()
aux.removeObjectAtIndex(fromIndexPath.row)
aux.insertObject(itemToMove, atIndex: toIndexPath.row)
try! realm.commitWrite()
TimesHome = aux
let times = realm.objects(ParciaisTimes)
if times.count > 0 {
for tm in times {
for i in 1...aux.count {
if aux[i-1].valueForKey("time_id") as! Int == tm.time_id {
realm.beginWrite()
tm.ordem = i
try! realm.commitWrite()
}
}
}
}
}