I'm a newcomer to xcode and Swift and I was wondering if there was any simple way to add cells to a Table View similar to the method of adding selections to a Combo Box. Here's my code so far.
#IBOutlet weak var labelout: NSTextField!
#IBOutlet weak var partitionbox: NSComboBox!
#IBOutlet weak var comboboxtext: NSComboBoxCell!
#IBOutlet weak var launchtable: NSTableView!
#IBOutlet weak var tabletext: NSTextFieldCell!
#IBOutlet weak var pathlist: NSCell!
override func viewDidLoad() {
super.viewDidLoad()
partitionbox.removeAllItems()
let fileManager = NSFileManager.defaultManager()
var error: NSError? = nil
let contents = fileManager.contentsOfDirectoryAtPath("/Volumes", error: &error)
partitionbox.addItemsWithObjectValues(contents!)
// Do any additional setup after loading the
}
#IBAction func refreshbuttonpress(sender: AnyObject) {
partitionbox.removeAllItems()
let fileManager = NSFileManager.defaultManager()
var error: NSError? = nil
let contents = fileManager.contentsOfDirectoryAtPath("/Volumes", error: &error)
partitionbox.addItemsWithObjectValues(contents!)
}
#IBAction func inspectbuttonpress(sender: AnyObject) {
let fileManager = NSFileManager.defaultManager()
var error: NSError? = nil
let part = comboboxtext.stringValue
let directory = part + "/Library/LaunchAgents"
let cellcontent = fileManager.contentsOfDirectoryAtPath("/Library/LaunchAgents", error: &error)
// Anything similar to addItemsWithObjectValues for TableView?
}
override var representedObject: AnyObject? {
didSet {
// Update the view, if already loaded.
}
}
My application aim is to have a list of all LaunchAgents, LaunchDaemons and Frameworks installed to an OS.
Thanks.
Related
I'm a bit of a newb here, so please be kind. I'm a former Air Force pilot and am currently in law school, so coding is not my full time gig...but I'm trying to learn as I go (as well as help my kiddos learn).
I'm working on a profile page for my iOS app. I've gone through the firebase documentation quite extensively, but it just doesn't detail what I'm trying to do here. I've also searched on this site trying to find an answer...I found something that really helped, but I feel like something is just not quite right. I posted this previously, but I deleted because I did not receive any helpful input.
What I'm trying to do is display the user's data (first name, last name, phone, address, etc.) via labels. The code (provided below) works to show the user id and email...I'm thinking this is because it is pulled from the authentication, and not from the "users" collection. This code is attempting to pull the rest of the user's data from their respective document in the users collection.
Here is the full code for the viewController. I've tried and failed at this so many times that I'm really on my last straw...hard stuck! Please help!
My guess is that something is not right with the firstName variable...whether that be something wrong with the preceding database snapshot, or with the actual coding of the variable. But then again...I don't know what I'm doing...so perhaps I'm way off on what the issue is.
// ClientDataViewController.swift
import UIKit
import Firebase
import FirebaseAuth
import FirebaseFirestore
class ClientDataViewController: UIViewController {
#IBOutlet weak var firstNameLabel: UILabel!
#IBOutlet weak var lastNameLabel: UILabel!
#IBOutlet weak var emailLabel: UILabel!
#IBOutlet weak var phoneLabel: UILabel!
#IBOutlet weak var streetLabel: UILabel!
#IBOutlet weak var street2Label: UILabel!
#IBOutlet weak var cityLabel: UILabel!
#IBOutlet weak var stateLabel: UILabel!
#IBOutlet weak var zipLabel: UILabel!
#IBOutlet weak var attorneyLabel: UILabel!
#IBOutlet weak var updateButton: UIButton!
#IBOutlet weak var passwordButton: UIButton!
#IBOutlet weak var uidLabel: UILabel!
let id = Auth.auth().currentUser!.uid
let email = Auth.auth().currentUser!.email
// MARK: Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
self.uidLabel.text = id
self.emailLabel.text = email
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated) // call super
getName { (name) in
if let name = name {
self.firstNameLabel.text = name
print("great success")
}
}
}
// MARK: Methods
func getName(completion: #escaping (_ name: String?) -> Void) {
let uid = "dL27eCBT70C4hURGqV7P"
let docRef = Firestore.firestore().collection("users").document(uid)
docRef.getDocument { (document, error) in
if let document = document, document.exists {
let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
print("Document data: \(dataDescription)")
} else {
print("Document does not exist")
}
completion("put the first name data here after we figure out what's in the doc")
}
}
}
The following with solve your problems. However, I'd advise against declaring id and email as force-unwrapped instance properties; they don't even need to be instance properties, let alone force unwrapped. Always safely unwrap optionals before using their values, especially these authorization properties because if the user isn't signed in or is signed out underneath you (expired token, for example), the app would crash here and, as with flying planes, crashing is always to be avoided.
class ClientDataViewController: UIViewController {
#IBOutlet weak var firstNameLabel: UILabel!
#IBOutlet weak var lastNameLabel: UILabel!
#IBOutlet weak var emailLabel: UILabel!
#IBOutlet weak var phoneLabel: UILabel!
#IBOutlet weak var streetLabel: UILabel!
#IBOutlet weak var cityLabel: UILabel!
#IBOutlet weak var stateLabel: UILabel!
#IBOutlet weak var zipLabel: UILabel!
#IBOutlet weak var attorneyLabel: UILabel!
#IBOutlet weak var updateButton: UIButton!
#IBOutlet weak var passwordButton: UIButton!
#IBOutlet weak var uidLabel: UILabel!
let id = Auth.auth().currentUser!.uid
let email = Auth.auth().currentUser!.email
// MARK: Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
self.uidLabel.text = id
self.emailLabel.text = email
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated) // call super
getName { (name) in
if let name = name {
self.firstNameLabel.text = name
print("great success")
}
}
}
// MARK: Methods
func getName(completion: #escaping (_ name: String?) -> Void) {
guard let uid = Auth.auth().currentUser?.uid else { // safely unwrap the uid; avoid force unwrapping with !
completion(nil) // user is not logged in; return nil
return
}
Firestore.firestore().collection("users").document(uid).getDocument { (docSnapshot, error) in
if let doc = docSnapshot {
if let name = doc.get("firstName") as? String {
completion(name) // success; return name
} else {
print("error getting field")
completion(nil) // error getting field; return nil
}
} else {
if let error = error {
print(error)
}
completion(nil) // error getting document; return nil
}
}
}
}
And thank you for your service! Hopefully you got to fly a B1-B.
I suspect from the evidence in your question that you are getting a doc, but have an incorrect field name or an uninitialized field in the retrieved doc. As a debug step, replace your getName function with this one, which prints all of the data found in the doc.
func getName(completion: #escaping (_ name: String?) -> Void) {
let uid = Auth.auth().currentUser!.uid
let docRef = Firestore.firestore().collection("users").document(uid)
docRef.getDocument { (document, error) in
if let document = document, document.exists {
let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
print("Document data: \(dataDescription)")
} else {
print("Document does not exist")
}
completion("put the first name data here after we figure out what's in the doc")
}
}
Once we know what's in the doc, it should be easy to work out what value to pass to the completion function.
This question already has answers here:
How can I use UserDefaults in Swift?
(14 answers)
Closed 4 years ago.
First time poster so sorry for the incorrect format/length of the question.
I am building an app in Xcode that allows users to input various inputs among numerous view controllers and then have output in a single view controller with results displayed through labels.
The raw inputted textfield data is stored into UserDefaults and can display them later in the resulting VC with no problem. Im having trouble with calculated outputs (in this example "papiresult") however.
Can anyone provide guidance how to print out the calculated result several view controllers later using UserDefaults?
This is the rough layout
Here is the code I have in the first ViewController:
import UIKit
let userDefaults = UserDefaults()
var papiresult = Double()
class ViewController1: UIViewController, UITextFieldDelegate {
#IBOutlet weak var textField1: UITextField!
#IBOutlet weak var textField2: UITextField!
#IBOutlet weak var textField3: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
textField1.delegate = self
textField2.delegate = self
textField3.delegate = self
}
//Declaring data input into UserDefaults//
#IBAction func sendDataToVC2(_ sender: Any) {
let systPA = Double(textField1.text!)
let diastPA = Double(textField2.text!)
let cvPressure = Double(textField3.text!)
papiresult = ((systPA!-diastPA!)/cvPressure!)
userDefaults.set(textField1.text, forKey: "PASP")
userDefaults.set(textField2.text, forKey: "PADP")
userDefaults.set(textField3.text, forKey: "CVP")
userDefaults.set(papiresult, forKey: "PAPI")
}
}
Here is the code in the last (result) view controller:
import UIKit
class ViewController3: UIViewController {
#IBOutlet weak var label1: UILabel!
#IBOutlet weak var label2: UILabel!
#IBOutlet weak var label3: UILabel!
#IBOutlet weak var label4: UILabel!
#IBOutlet weak var label5: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
}
//Recalling data from UserDefaults//
override func viewWillAppear(_ animated: Bool) {
if let data1 = userDefaults.object(forKey: "PASP") {
if let message1 = data1 as? String {
self.label1.text = message1}
}
if let data2 = userDefaults.object(forKey: "PADP") {
if let message2 = data2 as? String {
self.label2.text = message2}
}
if let data3 = userDefaults.object(forKey: "CVP") {
if let message3 = data3 as? String {
self.label3.text = message3}
}
if let data4 = userDefaults.object(forKey: "Age") {
if let message4 = data4 as? String {
self.label4.text = message4}
}
if let data5 = userDefaults.object(forKey: "PAPI") {
if let message5 = data5 as? Double {
self.label5.text = "\(message5)"}
}
}
Basically, you should use UserDefaults.standard rather than creating a new instance of UserDefaults class. So I think this code
let userDefaults = UserDefaults()
should be replaced with this:
let userDefaults = UserDefaults.standard
Suppose I have a label that is a NSTextField. I know I can access the value of that label by:
#IBOutlet weak var label: NSTextField!
let labelValue = label.stringValue
And then I can use that variable accordingly.
The same is easily said for an NSImage:
#IBOutlet weak var productImageView: NSImageView!
let img = productImageView.image
My question is how do I grab the value of a WebView. I am unsure which property allows me to use a WebView.
#IBOutlet weak var videoTemp: WebView!
let videoPassed = videoTemp //how do I access this videoTemp's value much like .stringValue and .image
I am trying to load dynamic video URL's to Youtube videos when I click on a collection view item. The line that I have commented in my setupAppVideo method is where my fatal error occurs:
"fatal error: unexpectedly found nil while unwrapping an Optional value"
but when I print out the url and request variables their are no nil values and all of them are the correct links in the console.
import Cocoa
import WebKit
class test1: NSCollectionViewItem {
#IBOutlet weak var label: NSTextField!
#IBOutlet weak var label2: NSTextField!
#IBOutlet weak var productImageView: NSImageView!
#IBOutlet weak var videoTemp: WKWebView!
var buildProduct: ProductModel? {
didSet{
label.stringValue = (buildProduct?.product_name)!
label2.stringValue = (buildProduct?.product_price)!
setupAppIconImage()
setupAppVideo()
}
}
override func viewDidLoad() {
super.viewDidLoad()
}
func setupAppIconImage() {
if let appIconImageURL = buildProduct?.product_image {
let url = NSURL(string: appIconImageURL)
URLSession.shared.dataTask(with: url! as URL,completionHandler:{(data, response, error) in
if error != nil {
print(error)
return
}
DispatchQueue.main.async(){
self.productImageView.image = NSImage(data: data!)
}
}).resume()
}
}
func setupAppVideo(){
if let appVideoURL = buildProduct?.product_video{
let url = NSURL(string: appVideoURL)
print(url)
let request = NSURLRequest(url: url as! URL)
print(request)
//self.videoTemp.load(request as URLRequest)
}
}
}
I was wondering how to save the text inside UITextView to parse. Everytime I run my code below an error comes up saying it accidentally "found nil when unwrapping an optional" on the lines that save the information to parse.
Note: The functions "SaveNotesParse" and "SaveFrontScreenInfo" are where the errors occur. They are also both called in another class.
#IBOutlet weak var titleText: UITextView!
#IBOutlet weak var descriptionText: UITextView!
#IBOutlet weak var titleText2: UITextView!
#IBOutlet weak var contentText: UITextView!
let testObject = PFObject(className: "Notes")
func SaveNotesParse () {
//parse stuff
testObject["Title2"] = titleText2.text
testObject["Content"] = contentText.text
print("Saving")
testObject.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
print("Object has been saved.")
}
}
func SaveFrontScreenInfo () {
testObject["Title"] = titleText.text
testObject["Description"] = descriptionText.text
}
override func awakeFromNib() {
foregroundView.layer.cornerRadius = 10
foregroundView.layer.masksToBounds = true
super.awakeFromNib()
}
override func animationDuration(itemIndex:NSInteger, type:AnimationType)-> NSTimeInterval {
let durations = [0.26, 0.2, 0.2]
return durations[itemIndex]
}
Image of the error and line that it appears:
Line that the error message appears
The actual error message as shown in the logs
Try using the setObject function like so:
testObject.setObject(titleText2.text, forKey: "Title2")
Otherwise, can you tell us what is nil? It will have to be either the testObject or the Text Fields. Try printing them to see which one is nil.
Having issues saving my manage objects within my code. For some reason when i place data in the first view controller everything works well. For instance
I place new categories such as "Fruits", "Dairy", "Meats". The first view controller takes the data. When I click on the specific item such as "Dairy", and put in "Milk" for items within that section. If I go back to the previous view controller and click on "Meats", I see the same data i put in under "Dairy". How do i properly manage my NSManage objects.
Here is my code below.
import UIKit
import CoreData
class HomeSpecificItemViewController: UIViewController {
var selectedItem : [Items] = []
#IBOutlet weak var itemNameTextField: UITextField!
#IBOutlet weak var brandNameTextField: UITextField!
#IBOutlet weak var caloriesTextField: UILabel!
#IBOutlet weak var priceTextField: UILabel!
#IBOutlet weak var amountTextField: UITextField!
#IBOutlet weak var threshHoldNumberField: UITextField!
#IBOutlet weak var stepper: UIStepper!
override func viewDidLoad() {
super.viewDidLoad()
stepper.wraps = true
stepper.autorepeat = true
stepper.maximumValue = 10
// Do any additional setup after loading the view.
}
#IBAction func saveButton(sender: AnyObject) {
let context = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
let itemDescription = NSEntityDescription.insertNewObjectForEntityForName("Items", inManagedObjectContext: context) as! Items
itemDescription.setValue(itemNameTextField.text, forKey: "Items")
itemDescription.setValue(brandNameTextField.text, forKey: "Items")
do {
try context.save()
}catch _ {
}
/*
let request = NSFetchRequest(entityName: "Items")
let results : [AnyObject]?
do {
results = try context.executeFetchRequest(request)
}catch _ {
results = nil
}
if results != nil {
self.itemDescription = results as! [Items]
}
*/
}
#IBAction func cancelPressed(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func increaseNumberStepper(sender: UIStepper) {
threshHoldNumberField.text = Int(sender.value).description
}
}
Do you have a specific view controller for each category? If so, what you have to do is add predicates to your more specific view controllers.
Something like:
var request = NSFetchRequest(entityName: "Food")
request.predicate = NSPredicate(format: "category == %#", "Meat")
meats = try! context.executeFetchRequest(request)
This would return an array of all Food objects whose category atribute holds the string "Meat".
I was saving my data to core data without properly declaring the manage context and without assigning the text labels to the core data object.
issue resolved!