I am creating a OSX Cocoa Application using Swift. I am trying to get the input from a NSTextView to my paste board.
#IBOutlet var issues: NSTextView!
#IBAction func button(_ sender: Any) {
let stringvalue = "Issue: \(issues.StringValue)"
let pasteboard = NSPasteboard.general()
pasteboard.declareTypes([NSPasteboardTypeString], owner: nil)
pasteboard.setString(stringvalue, forType: NSPasteboardTypeString)
}
The only error that I am getting is "Value of type 'NSTextView' has no member 'stringValue'.
I don't want to use NSTextField since that only lets me use one line.
NSTextView is a subclass of the NSText class. So you need to get your string using NSText string property:
if let string = issues.string {
let stringvalue = "Issue: \(string)"
print(stringvalue)
}
Related
The app presents users with a random quote. I want users to be able to save the quotes and see which ones they saved. I can get a single quote to save, however, anytime the save button is clicked again, it overrides the previously saved quote with the new one. I've tried to find the answer elsewhere, but I cannot seem to get it to work. Below is my current code. I've also tried replacing setValue with updateChildValues, but I get the error Cannot convert value of type 'String' to expected argument type '[AnyHashable : Any]'.
import UIKit
import FirebaseDatabase
import FirebaseAuth
class QuotesViewController: UIViewController {
var ref: DatabaseReference?
override func viewDidLoad() {
super.viewDidLoad()
ref = Database.database().reference()
}
#IBAction func backToMain(_ sender: UIButton) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(identifier: "mainHome")
vc.modalPresentationStyle = .overFullScreen
present(vc, animated: true)
}
#IBOutlet weak var quotesLabel: UILabel!
#IBAction func saveButton(_ sender: UIButton) {
guard let user = Auth.auth().currentUser?.uid else { return }
ref!.child("users").child(Auth.auth().currentUser!.uid).child("Quotes").child("quote").setValue(quotesLabel.text!)
}
#IBOutlet weak var nextButtonOutlet: UIButton!
#IBAction func nextQuoteButton(_ sender: UIButton) {
let quotesData = QuotesData()
let randomQuote = quotesData.randomQuote()
quotesLabel.text = randomQuote
}
}
I've also tried:
ref!.child("users").child(Auth.auth().currentUser!.uid).child("Quotes").child("quote").updateChildValues(quotesLabel.text!)
That is expected, you basically are referencing the very same node child("quote") and trying to change its value. But if you want to have multiple quotes, what you need to do is to create multiple nodes under the parent child("Quotes") with different names.
One trivial way of doing so, you might append a different number to each new quote node, for example when you want to add a new quote, define the following path:
child("Quotes").child("quote1").setValue("...")
Path for another quote:
child("Quotes").child("quote2").setValue("...")
And so on.
Alternatively, you can use Firebase Database reference method childByAutoId() to generate unique names. You will use that method after defining the parent node:
ref!.child("users").child(Auth.auth().currentUser!.uid).child("Quotes").childByAutoId().setValue(quotesLabel.text!)
Note:
Try to avoid force unwrapping as much as you can because that makes your app more prone to crashes.
I think you have to add one more field inside your firebase database that must be a unique one
For first time adding data into firebase you can write something like this
let key = ref.child("Quotes").childByAutoId().key
let dict = ["quote": quotesLabel.text!,
"quoteId" : key ?? ""
] as [String: Any]
And whenever you are saving the same quote then you can update the value inside the particular quoteID like this
func updateDatainFirebase(quoteId:String,quote:String){
let dict = ["quote": quotesLabel.text!,
"quoteId" : quoteId ?? ""
] as [String: Any]
self.ref.child(quoteId).updateChildValues(dict)
}
I am working on saving data process,
because my data is small, so I want to save in local data storage.
I want a make time schedule.
Because I have single 35 buttons and label(each buttons and label are paired), So I am using UIButton tag now. And I have a problem on using other local data "tag".
I tired to make new func on global swift file(same swift file). but it is not able to call tag, because tag is only can use when UIbutton pressed.
I want to use tag property on viewDidLoad(), not only in UIbuttonPressed.
override func viewDidLoad() {
if let items = UserDefaults.standard.array(forKey: "SubjectList") as? [String] {
subjectArray = items
UITextLabel**1**.text = subjectArray**[1-1]**
}
}
#IBAction func buttonPressed(_ sender: UIButton) {
var textField = UITextField()
let newItem = textField.text!
if sender.tag == 1{
self.subjectArray[sender.tag-1] = newItem
print("1")
}
UserDefaults.standard.set(self.subjectArray, forKey: "SubjectList")
}
Create outlet collections for all the paired labels and buttons
#IBOutlet weak var allLbls:[UILabel]!
#IBOutlet weak var allBts:[UIButton]!
In viewDidLoad
if let items = UserDefaults.standard.array(forKey: "SubjectList") as? [String] {
subjectArray = items
subjectArray.indices?.forEach {
allLbls[$0].text = subjectArray[$0]
allBts[$0].tag = $0
}
}
I'm programmatically adding a UITapGestureRecognizer to one of my views:
let gesture = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(modelObj:myModelObj)))
self.imageView.addGestureRecognizer(gesture)
func handleTap(modelObj: Model) {
// Doing stuff with model object here
}
The first problem I encountered was "Argument of '#selector' does not refer to an '#Objc' method, property, or initializer.
Cool, so I added #objc to the handleTap signature:
#objc func handleTap(modelObj: Model) {
// Doing stuff with model object here
}
Now I'm getting the error "Method cannot be marked #objc because the type of the parameter cannot be represented in Objective-C.
It's just an image of the map of a building, with some pin images indicating the location of points of interest. When the user taps one of these pins I'd like to know which point of interest they tapped, and I have a model object which describes these points of interest. I use this model object to give the pin image it's coordinates on the map so I thought it would have been easy for me to just send the object to the gesture handler.
It looks like you're misunderstanding a couple of things.
When using target/action, the function signature has to have a certain form…
func doSomething()
or
func doSomething(sender: Any)
or
func doSomething(sender: Any, forEvent event: UIEvent)
where…
The sender parameter is the control object sending the action message.
In your case, the sender is the UITapGestureRecognizer
Also, #selector() should contain the func signature, and does NOT include passed parameters. So for…
func handleTap(sender: UIGestureRecognizer) {
}
you should have…
let gesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(sender:)))
Assuming the func and the gesture are within a view controller, of which modelObj is a property / ivar, there's no need to pass it with the gesture recogniser, you can just refer to it in handleTap
Step 1: create the custom object of the sender.
step 2: add properties you want to change in that a custom object of the sender
step 3: typecast the sender in receiving function to a custom object and access those properties
For eg:
on click of the button if you want to send the string or any custom object then
step 1: create
class CustomButton : UIButton {
var name : String = ""
var customObject : Any? = nil
var customObject2 : Any? = nil
convenience init(name: String, object: Any) {
self.init()
self.name = name
self.customObject = object
}
}
step 2-a: set the custom class in the storyboard as well
step 2-b: Create IBOutlet of that button with a custom class as follows
#IBOutlet weak var btnFullRemote: CustomButton!
step 3: add properties you want to change in that a custom object of the sender
btnFullRemote.name = "Nik"
btnFullRemote.customObject = customObject
btnFullRemote.customObject2 = customObject2
btnFullRemote.addTarget(self, action: #selector(self.btnFullRemote(_:)), for: .touchUpInside)
step 4: typecast the sender in receiving function to a custom object and access those properties
#objc public func btnFullRemote(_ sender: Any) {
var name : String = (sender as! CustomButton).name as? String
var customObject : customObject = (sender as! CustomButton).customObject as? customObject
var customObject2 : customObject2 = (sender as! CustomButton).customObject2 as? customObject2
}
Swift 5.0 iOS 13
I concur a great answer by Ninad. Here is my 2 cents, the same and yet different technique; a minimal version.
Create a custom class, throw a enum to keep/make the code as maintainable as possible.
enum Vs: String {
case pulse = "pulse"
case precision = "precision"
}
class customTap: UITapGestureRecognizer {
var cutomTag: String?
}
Use it, making sure you set the custom variable into the bargin. Using a simple label here, note the last line, important labels are not normally interactive.
let precisionTap = customTap(target: self, action: #selector(VC.actionB(sender:)))
precisionTap.customTag = Vs.precision.rawValue
precisionLabel.addGestureRecognizer(precisionTap)
precisionLabel.isUserInteractionEnabled = true
And setup the action using it, note I wanted to use the pure enum, but it isn't supported by Objective C, so we go with a basic type, String in this case.
#objc func actionB(sender: Any) {
// important to cast your sender to your cuatom class so you can extract your special setting.
let tag = customTag as? customTap
switch tag?.sender {
case Vs.pulse.rawValue:
// code
case Vs.precision.rawValue:
// code
default:
break
}
}
And there you have it.
cell.btn.tag = indexPath.row //setting tag
cell.btn.addTarget(self, action: #selector(showAlert(_ :)), for: .touchUpInside)
#objc func showAlert(_ sender: UIButton){
print("sender.tag is : \(sender.tag)")// getting tag's value
}
Just create a custom class of UITapGestureRecognizer =>
import UIKit
class OtherUserProfileTapGestureRecognizer: UITapGestureRecognizer {
let userModel: OtherUserModel
init(target: AnyObject, action: Selector, userModel: OtherUserModel) {
self.userModel = userModel
super.init(target: target, action: action)
}
}
And then create UIImageView extension =>
import UIKit
extension UIImageView {
func gotoOtherUserProfile(otherUserModel: OtherUserModel) {
isUserInteractionEnabled = true
let gestureRecognizer = OtherUserProfileTapGestureRecognizer(target: self, action: #selector(self.didTapOtherUserImage(_:)), otherUserModel: otherUserModel)
addGestureRecognizer(gestureRecognizer)
}
#objc internal func didTapOtherUserImage(_ recognizer: OtherUserProfileTapGestureRecognizer) {
Router.shared.gotoOtherUserProfile(otherUserModel: recognizer.otherUserModel)
}
}
Now use it like =>
self.userImageView.gotoOtherUserProfile(otherUserModel: OtherUserModel)
You can use an UIAction instead:
self.imageView.addAction(UIAction(identifier: UIAction.Identifier("imageClick")) { [weak self] action in
self?.handleTap(modelObj)
}, for: .touchUpInside)
that may be a terrible practice but I simply add whatever I want to restore to
button.restorationIdentifier = urlString
and
#objc func openRelatedFact(_ sender: Any) {
if let button = sender as? UIButton, let stringURL = factButton.restorationIdentifier, let url = URL(string: stringURL) {
if UIApplication.shared.canOpenURL(url) {
UIApplication.shared.open(url, options: [:])
}
}
}
I am a beginner student in Swift 3 and I am currently studying CoreData. I am trying to do an App where I have a first controller that is a list view (tableviewcontroller) where I can see some students. Inside each cell, I have an image (UIImage) and 4 labels (Strings: name, preceptor, note and date) who fetch data from an Array that keeps the information from the entity "AlunosLista", who has one attribute for each item (image is binary data). I can add these information through another view controller (AddDataVC.swift) and list them perfectly. The app until here is fine. What i cannot do, and i have been trying a lot of things, many things, is to send the data from the row selected (clicked) to another viewcontroller for the detailed view (DetailsVC.swift). When i was using a simple Array, without CoreData, worked fine. But now i cannot do it. Now parts of the code:
File (1): TableviewController
class TabelaListagem: UITableViewController {....
import CoreData
import UIKit
var alunos: [NSManagedObject?] = []
var gerenciadorDeDados: NSManagedObjectContext? = nil
override func viewDidLoad() {
super.viewDidLoad()
//CORE DATA
let AppleObject = UIApplication.shared.delegate as! AppDelegate
gerenciadorDeDados = AppleObject.persistentContainer.viewContext
LoadFetch()
}
(.......)
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let path = alunos[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "celulaReuso", for: indexPath) as! ListagemCelulas
cell.lblAluno.text = path?.value(forKey: "nome") as? String
cell.lblPreceptor.text = path?.value(forKey: "preceptor") as? String
cell.lblData.text = path?.value(forKey: "dataHoje") as? String
cell.lblNotaAluno.text = path?.value(forKey: "nota") as? String
let caminhodaImagem = path?.value(forKey: "fotoAluno")
cell.imgAluno.image = UIImage(data: (caminhodaImagem as? NSData) as! Data)
return cell
}
Here should place the prepare(for segue), that I have tried many ways. This was the last one, who didn't worked too. "Build succeeded", but crashed.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segueAluno" {
if let pathC = tableView.indexPathForSelectedRow{
let VCDestino = segue.destination as? DescriAluno
let objeto = FecthResultado?.object(at: pathC)
VCDestino?.alunoD = objeto as! NSManagedObject?
}
}
}
File (2) DetailViewController
import UIKit
import CoreData
class DescriAluno: UIViewController {
#IBOutlet weak var imgFotoAluno: UIImageView!
#IBOutlet weak var nomeAluno: UILabel
#IBOutlet weak var txtPreceptor: UILabel!
#IBOutlet weak var txtNotaAluno: UILabel!
#IBOutlet weak var txtDataHoje: UILabel!
var gerenciadorDeDados: NSManagedObjectContext!
var alunoD: NSManagedObject?
override func viewDidLoad() {
super.viewDidLoad()
//CORE DATA
let AppleObject = UIApplication.shared.delegate as! AppDelegate
gerenciadorDeDados = AppleObject.persistentContainer.viewContext
imgFotoAluno.image = alunoD?.value(forKey: "fotoAluno")
nomeAluno.text = alunoD?.value(forKey: "nome")
txtPreceptor.text = alunoD?.value(forKey: "preceptor")
txtNotaAluno.text = alunoD?.value(forKey: "nota")
txtDataHoje.text = alunoD?.value(forKey: "dataHoje")
}
Error message after crash:
Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: 'executeFetchRequest:error:
is not a valid NSFetchRequest.'
I really don't know how to proceed. I have tried so many things, some of them told about NSFetchedResults, but i could write or understand them. If any one could help here, I appreciate. Thank you.
This is the Fetch request (func):
Ok. This is my fetch request:
func LoadFecth() {
let ordenacaoAZ = NSSortDescriptor(key: "nome", ascending: true)
let ordenacaoAZPrecep = NSSortDescriptor(key: "preceptor", ascending: true)
let recupoerardados = NSFetchRequest<NSFetchRequestResult>(entityName: "AlunosLista")
recupoerardados.sortDescriptors = [ordenacaoAZPrecep, ordenacaoAZ]
do{
let recupera = try gerenciadorDeDados?.fetch(recupoerardados)
self.alunos = recupera as! [NSManagedObject]
self.tableView.reloadData()
}catch let erro as NSError{
print("Erro ao carregar: \(erro.description)")
}
}
Your core data life will get easier in every way if you use NSManagedObject subclasses for your entities. This allows you to use convenience accessors to get typed fetch requests and to skip all this value(forKey: stuff and use properties.
The error is that your fetch request is not valid.
You may have mistyped the entity name ("AlunosLista").
It may be getting upset because the type of the fetch request, without a specific NSManagedObject subclass, is actually NSFetchRequest<NSManagedObject>.
The best thing to do is enter a subclass for the entity in the model editor, generate the subclass files, then use this:
let recupoerardados: NSFetchRequest<AlunosLista> = AlunosLista.fetchRequest()
I want to list the outgoing segues from a UIViewController, as described in Programmatically enumerate outgoing Segues for a UIViewController, but in Swift. (Swift 2, Xcode 7, iOS8+).
I can do
override func viewDidLoad() {
super.viewDidLoad()
let s = valueForKey("storyboardSegueTemplates")
print("switchingVC: segues: \(s)")
}
and that produces output like
switchingVC: segues: Optional((
"<UIStoryboardPresentationSegueTemplate: 0x1754a130>",
"<UIStoryboardPresentationSegueTemplate: 0x17534f60>",
"<UIStoryboardPresentationSegueTemplate: 0x17534fc0>"
))
but I struggle to produce anything after that. I can't find any definition of the UIStoryboardPresentationSegueTemplate. How can I persuade Swift to tell me what's inside it? How can I find the segue identifier?
Thanks!
this valueForKey("storyboardSegueTemplates") is UNDOCUMENTED property and UIStoryboardPresentationSegueTemplate is UNDOCUMENTED class. Beware of rejection from App Store if you are uploading application to App Store.
If you want to use this in your in-house projects, use as following
for template in (valueForKey("storyboardSegueTemplates") as? [AnyObject])! {
if let identifier = template.valueForKey("identifier") as? String {
print("identifier - " + identifier)
}
else {
print("no identifier for \(template)")
}
}
Found from https://github.com/JaviSoto/iOS9-Runtime-Headers/blob/master/Frameworks/UIKit.framework/UIStoryboardSegueTemplate.h
As per Swift 4.2 and from https://stackoverflow.com/a/35060917/1058199. Thanks /johnykutty.
import UIKit
extension UIViewController {
// Segue aids in Swift
#objc func isValidSegue(_ segueId: String?) -> Bool {
let filteredArray = (value(forKey: "storyboardSegueTemplates") as? NSArray)?.filtered(using: NSPredicate(format: "identifier = %#", segueId ?? ""))
let isValid = (filteredArray?.count ?? 0) > 0
return isValid
}
#objc func segues() -> Array<Any>? {
let segues = self.value(forKey: "storyboardSegueTemplates")
return segues as! Array<Any>?
}
#objc func segueNames() -> Array<AnyHashable> {
var segueNames = Array<Any>()
let filteredArray = (value(forKey: "storyboardSegueTemplates") as? NSArray)?.filtered(using: NSPredicate(format: "identifier != nil" ))
for template in filteredArray! as [AnyObject] {
if let identifier = (template.value(forKey: "identifier") as? String) {
segueNames.append(identifier)
}
else {
segueNames.append("no identifier for \(template)")
}
}
return segueNames as! Array<AnyHashable>
}
}
I know my use of predicates could be better, but Swift is such a PITA when dealing with iterating arrays. Please feel free to improve this.