In my code I am attempting to just set the text of a UILabel. The function doing this is being called, and everything inside it executes as expected, except for the UILabel.text assignment. Below is the gist of the code being run:
override func viewDidAppear(animated: Bool) {
var count2 = count
ref.child(String(count2-3)).observeSingleEventOfType(.Value, withBlock: { (snapshot2) in
var hitterRef = snapshot2.childSnapshotForPath("/Hitter")
var pitcherRef = snapshot2.childSnapshotForPath("/Pitcher")
var playRef = snapshot2.childSnapshotForPath("/Play")
var play = String(playRef.childSnapshotForPath("/Name").value!)
var outs = playRef.childSnapshotForPath("/Outs").value! as! Int
var rbi = playRef.childSnapshotForPath("/RBI").value! as! Int
assignScore(play, outs: outs, rbis: rbi, pitcherSelected: pitcherSelected, ResultsLabel: ResultsLabel, playName: playName, pointDiff: pointDiff)
})
print("successful delay")
count2++
}
func assignScore(play:String, outs:Int, rbis:Int, pitcherSelected:Bool, ResultsLabel: UILabel, playName: UILabel, pointDiff: UILabel){
var playScore = 0.0
print("assign score is running")
if(pitcherSelected == true) {
/*
*Below section covers the outs of the batter selected
*/
//below means that the user has selected the batter
if(outs == 0){
if(play == "Walk") {
//this means that the pitcher walked the batter
playScore -= 0.5
}else {
//means just a regular out
//nothing happens
}
}
}
ResultsLabel.text = "Test Text"
print("Below text test")
}
Related
I have an array which is set once a specific API is called. However when I then try to access this array at a later point it is empty again.
The class in question looks like this:
class SearchableLoginFormField: LoginFormField {
weak var delegate: PopoverPresentableDelegate?
var selectedObject: Selectable?
let popoverType: PopoverType
var sourceList = [Selectable]() {
didSet {
// Field set
}
}
private lazy var selectionPopover: ContainerPopover = {
let popover = LoginFormPopover(objectSelected: { object in
self.selectedObject = object
self.text = object.selectionName
self.selectionPopover.dismiss(animated: true)
}, popoverType: self.popoverType)
return popover
}()
init(popoverType: PopoverType, fieldTitle: String, fieldIcon: UIImage?,
colorScheme: UIColor?, returnAction: (() -> Void)?) {
self.popoverType = popoverType
super.init(fieldTitle: fieldTitle, fieldIcon: fieldIcon, colorScheme: colorScheme, returnAction: returnAction)
configureFormField()
}
required public init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func configureFormField() {
textDidChangeAction = { [weak self] in
/// We clear the selectedAirport each time user searches in field so that we know whether we need to trigger shouldEndEditingAction or not
/// (which we only trigger if user ends action and selectedAirport is nil)
self?.selectedObject = nil
self?.configureField(with: I6TextInputKeyboardSettings(
capitalization: .allCharacters,
spellCheck: .no
))
guard let self = self else { return }
self.searchObjects(
field: self,
popover: self.selectionPopover,
sourceList: self.sourceList,
dataPopover: self.selectionPopover)
}
self.shouldEndEditingAction = { [weak self] in
if self?.selectedObject == nil {
let filteredText = self?.text.replacingOccurrences(of: "-", with: "") // We remove the "-" if user has entered it so that reg can still be validated
self?.text = filteredText ?? ""
self?.verifyFieldInput()
}
}
}
private func searchObjects<T>(field: I6TextField, popover: ContainerPopover, sourceList: [T], dataPopover: ContainerPopover) {
if field.text.isEmpty {
dataPopover.dismiss(animated: true, completion: nil)
} else {
let filterCompletion: (Int) -> () = { count in
dataPopover.sourceView = field
// Present if needed
let isPopoverPresented = dataPopover.isVisiblyPresented
if (!dataPopover.isBeingPresented && !isPopoverPresented && count > 0) {
self.delegate?.presentPopover(popover: dataPopover)
}
if (isPopoverPresented || dataPopover.isBeingPresented) && count == 0 {
dataPopover.dismiss(animated: false, completion: nil)
}
}
dataPopover.filterToSearchTerm(field.text.replacingOccurrences(of: "-", with: ""), objects: sourceList, completion:filterCompletion)
}
}
private func verifyFieldInput() {
let matchingList = sourceList.filter {
$0.selectionName.lowercased() == self.text.lowercased()
}
if matchingList.count == 1 {
self.text = matchingList[0].selectionName
self.selectedObject = matchingList[0]
self.hasError = false
} else if matchingList.count > 1 {
self.errorAlert(errorText: Strings.EHandshake.FlightLookupCustomisable.mulitpleMatches.localizedFormat(""))
} else if matchingList.isEmpty {
self.errorAlert(errorText: Strings.EHandshake.FlightLookupCustomisable.noSelectionMatches.localizedFormat(""))
}
delegate?.textInputValidated(popover: selectionPopover)
}
}
The variable I am focussed on is the sourceList var.
Now, in the class where this object is created we declare the SearchableLoginFormField as follows:
lazy var iata: SearchableLoginFormField = {
let field = SearchableLoginFormField(
popoverType: .airport,
fieldTitle: FlightLookupStrings.originAiportCode.localized,
fieldIcon: UIImage.Login.origin,
colorScheme: fieldColor,
returnAction: nil)
field.delegate = self
validator.registerField(field, rules: [RequiredRule(message: ValidationStrings.aircraftRegistrationRequired.localized)])
return field
}()
And then we set the sourceList with the following delegate method:
func airportsSet() {
iata.sourceList = CoreDataObjectsManager.shared.airportsList
}
This is called when the airports list is retrieved from an API call.
Break points prove that the sourceList is being set correctly:
airportsSet() delegate method is hit and contains the correct airport list
didSet method on the SearchableLoginFormField is fired and the sourceList is successfully set to the Airports list
when we hit the textField delegate method upon editing the field, the sourceList is empty
I tried moving the configureFormField() method into the didSet on the sourceList but I have the same result.
I'm really confused how this seems to be set but then empty again. I'm keeping the breakpoint on the didSet and at no point is it being set to empty by anything else.
The superclass contains the following var:
public var textDidChangeAction: (() -> Void)?
and the following textFieldDelegate method:
open func textFieldDidChangeSelection(_ textField: UITextField) {
didChangeSelectionAction?()
}
So in the configureFormField method we are setting the action of this delegate method accordingly which gets triggered. It is at this point that the sourceList is empty.
The field itself is added in viewDidLoad of the main display viewController as follows:
stackView.add(arrangedSubviews: [number, reg, iata, submitButton, errorLabel])
I would like to show an ActionSheet containing InApp purchase objects the user can purchase.
But I want that sheet to contain the prices of such objects, like:
Object 1 ($1.99)
Object 2 ($2.99)
...
but the price is asynchronous, cause it has to be retrieved from the store.
So, I thought about doing this:
struct Package {
enum Packtype:String {
typealias RawValue = String
case obj1 = "com.example.object1"
case obj2 = "com.example.object2"
}
var productID:String = ""
#State var namePriceString:String = ""
init(productID:String) {
self.productID = productID
}
}
then, when I create the action sheet button I do this:
var obj1 = Package(productID: Package.Packtype.obj1.rawValue)
var obj2 = Package(productID: Package.Packtype.obj2.rawValue)
self.getPrices(packages:[obj1, obj2])
let obj1Button = ActionSheet.Button.default(Text(obj1.$namePriceString)) {
// do something with obj1
}
let obj2Button = ActionSheet.Button.default(Text(obj2.$namePriceString)) {
// do something with obj1
}
// build the actionsheet
later in the code:
func getPrices(packages:[Package]) {
let productIDS = Set(packages.map {$0.productID})
SwiftyStoreKit.retrieveProductsInfo(productIDS) { (answer) in
if answer.invalidProductIDs.first != nil { return }
let results = answer.retrievedProducts
if results.count == 0 { return }
for result in answer {
if let package = packages.filter({ ($0.productID == result.productIdentifier) }).first {
package.namePriceString = result.localizedTitle + "(" + "\(result.localizedPrice!)" + ")"
}
}
}
}
I have an error pointing to Text on the button creation lines saying
Initializer 'init(_:)' requires that 'Binding' conform to
'StringProtocol'
In a nutshell I need this:
I display the actionsheet. Its buttons contain no price.
I retrieve the prices
Actionsheet buttons are updated with the prices.
A possible solution is to return prices in a completion handler and only then display the action sheet:
struct ContentView: View {
#State var showActionSheet = false
#State var localizedPrices = [Package: String]()
var body: some View {
Button("Get prices") {
getPrices(packages: Package.allCases, completion: {
localizedPrices = $0
showActionSheet = true
})
}
.actionSheet(isPresented: $showActionSheet) {
let buttons = localizedPrices.map { package, localizedPrice in
ActionSheet.Button.default(Text(localizedPrice), action: { buy(package: package) })
}
return ActionSheet(title: Text("Title"), message: Text("Message"), buttons: buttons + [.cancel()])
}
}
}
func getPrices(packages: [Package], completion: #escaping ([Package: String]) -> Void) {
// simulates an asynchronous task, should be replaced with the actual implementation
DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
let localizedPrices = Dictionary(uniqueKeysWithValues: packages.map { ($0, "\(Int.random(in: 1 ..< 100))") })
completion(localizedPrices)
}
}
func buy(package: Package) {
print("Buying \(package.rawValue)")
}
enum Package: String, CaseIterable {
case obj1 = "com.example.object1"
case obj2 = "com.example.object2"
}
This can be further tuned with loading animations etc...
var players : [Player]?
var currentplayerIndex = 0
var currentQuestion : QuestionObject!
var questions = Questions()
var score = 0
var currentQuestionPos = 0
func updateUi() {
if let score = players?[currentplayerIndex].score {
playerPoints.text = "Points: \(score)"
}
}
func loadnextQuestion () {
if(currentQuestionPos < questions.questions.count) {
currentQuestionPos += 1
if currentplayerIndex < players!.count - 1 {
currentplayerIndex += 1
} else {
currentplayerIndex = 0
}
playerTurn.text = (players?[currentplayerIndex].name)
currentQuestion = questions.questions[currentQuestionPos]
questionText.text = currentQuestion.question
}
}
#IBAction func submitButtonPressed(_ sender: UIButton) {
let i = pickerView.selectedRow(inComponent: 0)
if(currentQuestion.answer == i) {
players?[currentplayerIndex].score += 1
loadnextQuestion()
updateUi()
} else {
updateUi()
loadnextQuestion()
}
}
}
My score displays only 0 all the time.
Does not increase when the answer is right.
All the added players get 1 question each but the sore is still 0 for all the players.
Your code doesn't work because you are doing this series of things when the answer is correct:
players?[currentplayerIndex].score += 1
loadnextQuestion()
updateUi()
The player's score is indeed incremented. But notice that the next thing you do is loadnextQuestion(), which increments currentplayerIndex. This causes updateUi to update the label's text to the score of the next player, not of the player that just answered the question correctly.
One way to fix this is to swap the last two lines:
players?[currentplayerIndex].score += 1
updateUi()
loadnextQuestion()
Notice that this is the same order as in the else branch, which you wrote correctly.
This causes the label to always display the score of the last player, which might not be desirable. Assuming there's not like 100 players or something crazy like that, I think it would be a much better UX if you display all the player's scores:
func updateUi() {
if let scores = players?.map({ "\($0.score)" }) {
playerPoints.text = "Points: \(scores.joined(separator: ", "))"
}
}
You can replace the button action work
#IBAction func submitButtonPressed(_ sender: UIButton) {
let i = pickerView.selectedRow(inComponent: 0)
if(currentQuestion.answer == i) {
players?[currentplayerIndex].score += 1
updateUi()
loadnextQuestion()
} else {
updateUi()
loadnextQuestion()
}
}
I have a WKCrownSequencer that triggers an action in my pushed interface controller and the first time through everything works fine. When I go back to root interface controller regardless of the method (pop or reloadRootcontrollers) the digital crown no longer works in first interface controller nor the second one. The StartInterfaceController is the rootInterfaceController and the MidWorkoutInterfaceController is the pushed one.
import WatchKit
import Foundation
class StartInterfaceController:
WKInterfaceController,CLLocationManagerDelegate {
override func awake(withContext context: Any?) {
super.awake(withContext: context)
// Configure interface objects here.
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
}
#IBAction func start() {
WKInterfaceController.reloadRootControllers(
withNames: ["midWorkout"], contexts: []
)
}
The second interface controller is below.
import WatchKit
import Foundation
class MidWorkoutInterfaceController: WKInterfaceController, WKCrownDelegate {
override func awake(withContext context: Any?) {
super.awake(withContext: context)
print("viewdidAwake")
print("ViewWillActivate")
crownSequencer.delegate = self
crownSequencer.focus()
WKInterfaceDevice.current().play(.success)
currentPhase = 0
let workoutType = UserDefaults.standard.object(forKey: "CurrentType") as? [String] ?? [ "Swimming", "T1"]
orderOfEventsSetter = workoutType
updateCurrentPhase()
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
crownSequencer.focus()
}
var clockTimer: Timer!
func workoutStarted(){
clockTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { [weak self] timer in
self?.totalTimeOutlet.setText( String(describing: -1 * Int(self!.startDate!.timeIntervalSinceNow)))
self?.splitTimeOutlet.setText( String(describing: -1 * Int(self!.currentStartDate!.timeIntervalSinceNow)))
}
}
override func didDeactivate() {
// This method is called when watch view controller is no longer visible
super.didDeactivate()
}
var startDate: Date?
var currentStartDate: Date?
//Outlets
#IBOutlet var currentPhaseOutlet: WKInterfaceLabel!
#IBOutlet var totalTimeOutlet: WKInterfaceLabel!
#IBOutlet var splitTimeOutlet: WKInterfaceLabel!
#IBOutlet var currentPaceOutlet: WKInterfaceLabel!
#IBOutlet var totalDistanceOutlet: WKInterfaceLabel!
var orderOfEventsSetter: Array<String>{
get{
return orderOfEvents
}
set{
var tempArray = ["GPS Locking In"]
for phase in newValue {
tempArray.append(phase)
}
orderOfEvents = tempArray
}
}
private var orderOfEvents: [String] = []
var currentPhase = 0 {
didSet{
if !orderOfEvents.isEmpty {
updateCurrentPhase()
}
}
}
func updateCurrentPhase(){
currentPhaseOutlet.setText(orderOfEvents[currentPhase])
}
//timing for location requests
//Corelocation Section
//CoreMotion Section
///crown control
var currentDialRotation = 0.0
let dialRotationRange = Range(uncheckedBounds: (lower: -Double.pi / 4, upper: Double.pi / 4))
let constantForTimer: TimeInterval = 0.1
var justTransitioned = false
func crownDidRotate(_ crownSequencer: WKCrownSequencer?, rotationalDelta: Double) {
currentDialRotation += rotationalDelta
if !dialRotationRange.contains(currentDialRotation){
currentDialRotation = 0.0
justTransitioned = true
makeTransition()
//make so two transitions cannot happen right after each other
}
print(currentDialRotation)
}
func crownDidBecomeIdle(_ crownSequencer: WKCrownSequencer?) {
print(String(describing: orderOfEvents[currentPhase]))
print("crown stopped")
}
func makeTransition(){
print(currentPhase)
print(orderOfEvents.count)
if (currentPhase) == orderOfEvents.count - 1 {
endWorkout()
}
else if (currentPhase == 0){
WKInterfaceDevice.current().play(.start)
let dateFormat = DateFormatter()
dateFormat.dateFormat = "mm/dd/yyyy"
startDate = Date()
currentStartDate = Date()
workoutStarted()
currentPhase += 1
}
else{
WKInterfaceDevice.current().play(.start)
print("transitioning to " + String(describing: orderOfEvents[currentPhase + 1]))
currentStartDate = Date()
stopTimers()
currentPhase += 1
}
}
#IBAction func endWorkoutButton() {
endWorkout()
}
func endWorkout(){
stopTimers()
clockTimer.invalidate()
alerts()
}
func alerts(){
let saveAction = WKAlertAction(title: "Save",
style: WKAlertActionStyle.default) {
self.goToStartScreen()
}
let discardAction = WKAlertAction(title: "Discard Workout",
style: WKAlertActionStyle.cancel) {
self.goToStartScreen()
}
presentAlert(withTitle: "Workout Complete",
message: "Would you like to save the workout?",
preferredStyle: WKAlertControllerStyle.alert,
actions: [saveAction, discardAction])
}
func goToStartScreen(){
crownSequencer.resignFocus()
self.popToRootController()
}
func stopTimers(){
if orderOfEvents[currentPhase] == "Running"{
}
if orderOfEvents[currentPhase] == "Biking"{
}
if currentPhase == orderOfEvents.count {
clockTimer.invalidate()
}
}
}
According to Apple's document here:
"...Only one object in your interface can have focus at any given time, so if your interface also contains picker objects or has scrollable scenes, you must coordinate changes in focus accordingly. For example, calling the sequencer's focus method causes any picker objects or interface controllers to resign focus. When the user taps on a picker object, the currently active sequencer resigns focus, and the selected picker object gains the focus... "
And you are to lose the focus at any time unpredictable...
"...If the user taps a picker object or a scrollable scene in your interface, the system automatically removes the focus from any active crown sequencer..."
I have a function where it goes into firebase data base and pulls the amount of items I have stored. It returns three when I print the variable postCount in the function itself but when I print it anywhere else it only has zero. It doesn't seem to be updating the global value.
import UIKit
import Firebase
class ViewController: UIViewController, iCarouselDataSource, iCarouselDelegate {
var items: [Int] = []
var postCount = 0
#IBOutlet var carousel: iCarousel!
func getData() {
Database.database().reference().child("Posts").observeSingleEvent(of: .value, with: { (snapshot) in
if let dict2 = snapshot.value as? [String: AnyObject] {
self.postCount = dict2.count
}
//This prints 3
print(self.postCount)
})
}
override func awakeFromNib() {
super.awakeFromNib()
print(self.postCount)
for i in 0 ... 99 {
items.append(i)
}
}
override func viewDidLoad() {
super.viewDidLoad()
getData()
print(self.postCount)
carousel.type = .cylinder
}
func numberOfItems(in carousel: iCarousel) -> Int {
return postCount
}
func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView {
var label: UILabel
var itemView: UIImageView
//reuse view if available, otherwise create a new view
if let view = view as? UIImageView {
itemView = view
//get a reference to the label in the recycled view
label = itemView.viewWithTag(1) as! UILabel
} else {
//don't do anything specific to the index within
//this `if ... else` statement because the view will be
//recycled and used with other index values later
itemView = UIImageView(frame: CGRect(x: 0, y: 0, width: 200, height: 400))
itemView.image = UIImage(named: "page.png")
itemView.layer.borderWidth = 10
itemView.contentMode = .center
label = UILabel(frame: itemView.bounds)
label.backgroundColor = .clear
label.textAlignment = .center
label.font = label.font.withSize(50)
label.tag = 1
itemView.addSubview(label)
}
//set item label
//remember to always set any properties of your carousel item
//views outside of the `if (view == nil) {...}` check otherwise
//you'll get weird issues with carousel item content appearing
//in the wrong place in the carousel
label.text = "\(items[index])"
return itemView
}
func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat {
if (option == .spacing) {
return value * 1.1
}
return value
}
}
I believe it is because retrieving data from Firebase is asynchronous. getData() is called and then instantly after that you print(self.postCount), even though getData() is still retrieving the data from Firebase.
Try changing the print(self.postCount) within getData() to
print("Data Loaded and there are \(self.postCount) posts")
and you should see in your log that the print(self.postCount) within viewDidLoad() is called before the print within getData(). As a result, when print(self.postCount) in viewDidLoad() is called, postCount still equals the default value of 0 since getValue() has not completed running even though that print is on the line after getData().
You probably want to call whatever functions that need to use the updated postCount inside the closure in getData() so that you ensure those functions use the updated postCount.
For example:
func getData() {
Database.database().reference().child("Posts").observeSingleEvent(of: .value, with: { (snapshot) in
if let dict2 = snapshot.value as? [String: AnyObject] {
self.postCount = dict2.count
}
print(self.postCount)
//everything within this closure will have the updated value of postCount
foo()
})
}
func foo() {
if self.postCount > 0 {
print("Lots of posts!")
}
else {
print("No posts :(")
}
}