Hello
Do you know why the comma in this calculator app isn't working:
import SwiftUI
import Combine
enum Nums: String{
case uno = "1"
case due = "2"
case tre = "3"
case quattro = "4"
case cinque = "5"
case sei = "6"
case sette = "7"
case otto = "8"
case nove = "9"
case zero = "0"
case moltiplicazione = "X"
case divisione = "/"
case somma = "+"
case meno = "-"
case uguale = "="
case AC = "AC"
case piùMeno = "±"
case percentuale = "%"
case virgola = "."
case niente = ""
}
struct ContentView: View {
var numeri: [[Nums]] = [
[Nums.AC, Nums.piùMeno, Nums.percentuale, Nums.divisione],
[Nums.sette, Nums.otto, Nums.nove, Nums.moltiplicazione],
[Nums.quattro, Nums.cinque, Nums.sei, Nums.meno],
[Nums.uno, Nums.due, Nums.tre, Nums.somma],
[Nums.zero, Nums.niente, Nums.virgola, Nums.uguale]
]
private var gridItemLayout = [GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible())]
@State var previousVar: Double = 0
let timer = Timer.publish(every: 0.001, on: .main, in: .common).autoconnect()
@State var con: Int = 0
@State var final: Double = 0
@State var operat = Nums(rawValue: "")
@State var digits: String = "0"
var res: Double {
get {
//digits.hasSuffix(".") ? Double(digits.dropLast()) ?? 0.0 : Double(digits) ?? 0.0
digits.hasSuffix(".") ? Double(digits) ?? 0.0 : Double(digits) ?? 0.0
}
nonmutating set {
digits = String(format: "%.10g", newValue) //- May need better formatting
}
}
var body: some View {
VStack{
Spacer()
HStack{
Spacer()
Text("\(digits)")
.font(.system(size: 50))
.bold()
.padding()
}
Spacer()
LazyVGrid(columns: gridItemLayout, content: {
ForEach(0..5){ i in
ForEach(0..4){ j in
RoundedRectangle(cornerRadius: 35.0)
.foregroundColor(.orange)
.frame(width: 80, height: 80, alignment: .center)
.overlay(
Text("\(numeri[i][j].rawValue)")
.font(.largeTitle)
.foregroundColor(.black)
).onTapGesture {
switch numeri[i][j] {
case Nums.AC:
operat = Nums.AC;
res = 0
case Nums.uguale:
operat = Nums.uguale;
res = final
case Nums.somma:
operat = Nums.somma;
previousVar = res;
res = 0;
con = 0
case Nums.meno:
operat = Nums.meno;
previousVar = res;
res = 0
con = 0
case Nums.divisione:
operat = Nums.divisione;
previousVar = res;
res = 0;
con = 0
case Nums.moltiplicazione:
operat = Nums.moltiplicazione;
previousVar = res;
res = 0;
con = 0
case Nums.percentuale:
operat = Nums.percentuale;
res = res / 100
case Nums.piùMeno:
operat = Nums.piùMeno;
if digits.hasPrefix("-") {
digits = String(digits.dropFirst())
} else {
digits = "-" + digits
}
con = 0
case Nums.virgola:
operat = Nums.virgola;
if !digits.contains(".") {
digits += "."
}
default:
if digits == "0" {
digits = numeri[i][j].rawValue
} else {
digits += numeri[i][j].rawValue
}
con += 1
}
}
}
}
}).onReceive(timer) { _ in
if con != 0 {
if operat == Nums.divisione{
final = previousVar / res
} else if operat == Nums.meno{
final = previousVar - res
} else if operat == Nums.moltiplicazione{
final = previousVar * res
} else if operat == Nums.somma{
final = previousVar + res
}
}
}
}.padding(2)
}
}
Maybe at line 51 and 52 or 121
(If you can explain my mistakes all around the code I would be grateful)
Thank you
Selecting any option will automatically load the page
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Hello
Is there any way to put the 2 Texts in an HStack without putting the 2 ForEachs together?
Code:
ForEach(model.data, id: \.objectID){ obj in
Text(model.getValue(obj: obj))
}.onDelete(perform: model.deleteData)
ForEach(date.data, id: \.objectID){ obj1 in
Text("\(date.getValue(obj: obj1), formatter: dateFormatter)")
}.onDelete(perform: date.deleteData)
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I have a Raindrop shape:
struct Raindrop: Shape {
func path(in rect: CGRect) - Path {
Path { path in
path.move(to: CGPoint(x: rect.size.width / 2, y: 0))
path.addQuadCurve(to: CGPoint(x: rect.size.width / 2, y: rect.size.height), control: CGPoint(x: rect.size.width, y: rect.size.height))
path.addQuadCurve(to: CGPoint(x: rect.size.width / 2, y: 0), control: CGPoint(x: 0, y: rect.size.height))
}
}
}
When I trim it in the ContentView, it trims from right to left, is there a way to trim it from top to bottom?
Raindrop()
.trim(from: 0.9, to: 1)
.scaledToFit()
Thank you
Hello
How do I solve the Index out of range at line 81
I tried many ways, but none of them worked
//
// ContentView.swift
// Fede
//
// Created by Jad Taljabini on 14/03/21.
//
import SwiftUI
struct ContentView: View {
@State private var media: String = ""
@State private var voto: String = ""
@State private var voti: [Float] = []
@State private var nVoti: Int = 0
@State private var test: String = ""
@State private var voti2: [Float] = []
let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
var body: some View {
NavigationView {
Form {
Section{
TextField("A che media vuoi arrivare", text: $media)
}
Section{
TextField("Quanti voti prenderai", text: $test)
}
Section{
HStack {
TextField("Tuoi voti", text: $voto)
Spacer()
Button(action: {
voti.append(Float(voto) ?? 0)
voto = ""
nVoti = nVoti + 1
}, label: {
Text("Add")
})
}
}
Section{
ForEach(voti, id: \.self){ item in
Text("\(item, specifier: "%.1f")")
}.onDelete(perform: removeRows)
}
Section(header: Text("Voti che devi prendere")){
ForEach(voti2, id: \.self){ item2 in
Text("\(item2)")
}
}
}.onReceive(timer) { input in
voti2 = tutto()
}
.navigationTitle("Media")
}
}
func tutto() - [Float] {
let testInt = Int(test) ?? 0
let mediaFloat = Float(media) ?? 0
var mediaEffettiva = mediaEffFunzione(dim: nVoti)
if mediaEffettiva mediaFloat {
for i in 0..testInt - 2 {
voti2[i] = Float(Int(mediaEffettiva + 1))
}
let mediaEffettivaInt = Int(mediaEffettiva)
let mediaFloatInt = Int(mediaFloat)
var con: Int = 0
while(mediaEffettivaInt mediaFloatInt){
for j in nVoti..nVoti + testInt - 2{
voti[j] = voti2[j - nVoti];
}
mediaEffettiva = mediaEffFunzione(dim: nVoti + testInt)
if(mediaEffettiva mediaFloat){
voti2[con] += 0.5
}
con = con + 1
if con = testInt {
con = 0
}
}
}
return voti2
}
func removeRows(at offsets: IndexSet) {
voti.remove(atOffsets: offsets)
}
func mediaEffFunzione(dim: Int) - Float {
var somma: Float = 0
for i in voti{
somma = somma + i
}
return somma / Float(dim)
}
}
Thank you very much
Hello
If I have this array:
var objects = [
Object(value: 100, date: Date(), imageTemplate: "30"),
Object(value: 200, date: Date(), imageTemplate: "20"),
Object(value: 400, date: Date() + 84000, imageTemplate: "10")
]
How can I count how many different dates are in the array using NSPredicate?
In this case it should return 2.
Thank You!
Hello
import SwiftUI
enum When: String {
case Today
case Week
case Month
case Year
}
struct ChartView: View {
var when: When
@EnvironmentObject var millilitriInseritiModel: MillilitriInseritiModel
var valoriAsseX: [String]{
if when == When.Week{
return ["M", "T", "W", "T", "F", "S", "S"]
} else if when == When.Month{
return ["7", "14", "21", "28"]
} else if when == When.Year{
return ["J", "F", "M", "A", "M", "J", "J", "A", "S", "O", "N", "D"]
}
return []
}
var valoriAsseY: [Double]{
return []
}
var dates: [Date] = [Date(), Date().addingTimeInterval(86400), Date().addingTimeInterval(86400 * 2)]
@State var valori: [Double] = [1000, 2000, 3000, 1000, 2000, 1000, 2000, 3000, 1000, 2000, 3000]
var altezzaRettangolo: [Double]?{
var altezze: [Double] = []
for i in 0..<valori.count{
altezze.append(valori[i])
}
return altezze
}
@State var animation: Bool = false
var body: some View{
HStack(alignment: .bottom, spacing: 8, content: {
ForEach(valoriAsseX.indices){ i in
VStack{
RoundedRectangle(cornerRadius: 3)
.fill(LinearGradient(gradient: Gradient(colors: [Color.red, Color.blue]), startPoint: .top, endPoint: .bottom))
.frame(width: 40, height: animation ? CGFloat(altezzaRettangolo?[i] ?? 0) / 7 : 0)
.animation(.easeInOut)
Text(valoriAsseX[i])
.fontWeight(.semibold)
.multilineTextAlignment(.leading)
.onTapGesture {
withAnimation{
valori[i] += 100
}
}
}
}
})
.padding()
.onAppear {
animation = true
}
.onDisappear {
animation = false
}
}
}
struct ChartView_Previews: PreviewProvider {
static var previews: some View {
ChartView(when: When.Year)
}
}
As you might notice, in the previews I set when to When.Year, that is crashing the app because the array valoriAsseX is bigger than the array altezzaRettangolo, so when I iterate it in the ForEach loop it crashes, I can't find any way to solve this, I tried an if let but it is crashing anyway, any ideas?
Thank you
Hello
I want to be able to save Date in @AppStorage, and it works however I was wondering what was the difference between these two extensions, which one is better and why?
extension Date: RawRepresentable {
static var dateFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateStyle = .long
return formatter
}()
public var rawValue: String {
Date.dateFormatter.string(from: self)
}
public init?(rawValue: String) {
self = Date.dateFormatter.date(from: rawValue) ?? Date()
}
}
and
extension Date: RawRepresentable {
private static let formatter = ISO8601DateFormatter()
public var rawValue: String {
Date.formatter.string(from: self)
}
public init?(rawValue: String) {
self = Date.formatter.date(from: rawValue) ?? Date()
}
}
Thank You!
Hello
I wanted to know why when I print(Date()) the date is printed but two hours before?
Example
If I print(Date()) and the actual date is 2021-09-10 22:33:41 +0000, it prints 2021-09-10 20:33:41 +0000 instead of 2021-09-10 22:33:41 +0000.
Why does this happen?
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How can I remove the Collapse button that is on the navigationBar in iPadOS?
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Is there a view to loop different views, for example in a ForEach loop
Here is what I mean:
import SwiftUI
struct ContentView: View {
		@State var view1 = false
		@State var view2 = false
		@State var view3 = false
		@State var view4 = false
		
		private var gridItemLayout = [GridItem(.flexible()), GridItem(.flexible())]
		
		
		var textSize: CGFloat {
				if UIDevice.current.userInterfaceIdiom == .pad {
						return 48
				}
				return 23
		}
		
		var title: CGFloat {
				if UIDevice.current.userInterfaceIdiom == .pad {
						return 60
				}
				return 34
		}
		
		var height: CGFloat {
				if UIDevice.current.userInterfaceIdiom == .pad {
						return 0.15
				}
				return 0.15
		}
		
		var weight: CGFloat {
				if UIDevice.current.userInterfaceIdiom == .pad {
						return 0.44
				}
				return 0.43
		}
		
		var body: some View {
				NavigationView{
						GeometryReader { geometry in
								ScrollView(.vertical, showsIndicators: true) {
										LazyVGrid(columns: gridItemLayout, spacing: 18){
												Group{
														Text("View1")
														.foregroundColor(.black)
														.frame(width: geometry.size.width * weight, height: geometry.size.height * height)
														.background(Color.white)
														.onTapGesture {
																view1 = true
														}
														
														.sheet(isPresented: $view1) {
																View1()
														}
														
														Text("View2")
														.foregroundColor(.black)
														.frame(width: geometry.size.width * weight, height: geometry.size.height * height)
														.background(Color.white)
														.onTapGesture {
																view2 = true
														}
														
														.sheet(isPresented: $view2) {
																View2()
														}
														
														Text("View3")
														.foregroundColor(.black)
														.frame(width: geometry.size.width * weight, height: geometry.size.height * height)
														.background(Color.white)
														.onTapGesture {
																view3 = true
														}
														
														.sheet(isPresented: $view3) {
																View3()
														}
														
														Text("View4")
														.foregroundColor(.black)
														.frame(width: geometry.size.width * weight, height: geometry.size.height * height)
														.background(Color.white)
														.onTapGesture {
																view4 = true
														}
														
														.sheet(isPresented: $view4) {
																View4()
														}
														
														
												}
												
										}.padding()
										
								}
								
						}
						.navigationTitle("Title")
						
				}
		}
		
		
}
Is there a way to put the 4 views in a loop instead of making four different Text Views(they are different views)
Thank your for your time
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Everytime I run a project I get this popup: The document “iosfwd” could not be saved. You don’t have permission.
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Is there a way to append a number to a Double, like this:
var num: Double = 1
var num2 = num.append(1)
//num2 should be 11
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@FetchRequest(
entity: Book(),
sortDescriptors: []
) var books: FetchedResults<Book>
How can I get notified when books changes?
I was thinking about putting this...
.onReceive(NotificationCenter.default.publisher(for: .NSManagedObjectContextDidSave), perform: { _ in})
... in my main View but this would notify me if anything gets saved and that is not what I want. I want to get notified just if a certain FetchRequest changes (in this case books)?
How can I do that?
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Hello, I have created a simple SwiftUI app with Core Data and want to be able to add data via the shortcuts app, I have implemented Intents and the IntentHandler class. When I create a shortcut to add data to my app and run it, nothing happens in the app, the list does not refresh, the only way to see the added data is to close the app completely and reopen it. How can I refresh the UI immediately? I will post my Core Data stack and my SwiftUI view.
struct PersistenceController {
static let shared = PersistenceController()
let container: NSPersistentContainer
init() {
container = NSPersistentContainer(name: "SiriShort")
guard let fileContainer = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.SiriShortcut2")?.appendingPathComponent("SiriShort.sqlite") else {
fatalError("Shared file container could not be created.")
}
let storeDescription = NSPersistentStoreDescription(url: fileContainer)
storeDescription.setOption(true as NSNumber, forKey: NSPersistentHistoryTrackingKey)
storeDescription.setOption(true as NSNumber, forKey: NSPersistentStoreRemoteChangeNotificationPostOptionKey)
container.persistentStoreDescriptions = [storeDescription]
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
fatalError("Unresolved error \(error), \(error.userInfo)")
}
})
container.viewContext.automaticallyMergesChangesFromParent = true
container.viewContext.mergePolicy = NSMergeByPropertyStoreTrumpMergePolicy
}
}
View:
import SwiftUI
import CoreData
import Intents
struct ContentView: View {
@Environment(\.managedObjectContext) private var viewContext
@State private var view: Bool = false
@FetchRequest(
sortDescriptors: [NSSortDescriptor(keyPath: \Item.text, ascending: true)],
animation: .default)
private var items: FetchedResults<Item>
var body: some View {
NavigationView {
List {
ForEach(items) { item in
Text(item.text!)
}
.onDelete(perform: deleteItems)
}
.toolbar {
ToolbarItem(placement: .navigationBarTrailing) {
EditButton()
}
ToolbarItem {
Button(action: addItem) {
Label("Add Item", systemImage: "plus")
}
}
}
}
}
private func addItem() {
withAnimation {
let newItem = Item(context: viewContext)
newItem.text = "\(Int.random(in: 0...1000))"
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
makeDonation(text: newItem.text!)
}
}
func makeDonation(text: String) {
let intent = MakeUppercaseIntent()
intent.text = text
intent.unit = "1"
intent.suggestedInvocationPhrase = "Add \(text) to app"
let interaction = INInteraction(intent: intent, response: nil)
interaction.donate { (error) in
if error != nil {
if let error = error as NSError? {
print("Donation failed: %@" + error.localizedDescription)
}
} else {
print("Successfully donated interaction")
}
}
}
private func deleteItems(offsets: IndexSet) {
withAnimation {
offsets.map { items[$0] }.forEach(viewContext.delete)
do {
try viewContext.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nsError = error as NSError
fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
}
}
}
}
Hello
I have two questions: I'm using a decimalpad keyboard and when I use the comma the app doesn't recognise it
How do I dismiss the keyboard?
I want that in every country the decimals are written with the comma ( , )
(Can you please write the solution if you know it, thank you for your time)
Code:
import SwiftUI
struct BMIView: View {
@State private var height = ""
@State private var weight = ""
@Environment(\.presentationMode) var presentationMode
var inputAfterConvertions: Float {
let hh = Float(height) ?? 0
let ww = Float(weight) ?? 0
var ris: Float = 0
if hh > 0 && ww > 0{
ris = (ww / (hh * hh)) * 1000
return ris
}
return 0
}
var health: String{
if inputAfterConvertions < 18.49 && inputAfterConvertions > 0 {
return ""
}
else if inputAfterConvertions > 18.5 && inputAfterConvertions < 24.99{
return ""
} else if inputAfterConvertions > 25{
return ""
}
return ""
}
@State var isWriting: Bool = false
var body: some View {
NavigationView{
Form{
Section(header: Text("Enter your height in cm")){
TextField("Input",text: $height)
.keyboardType(.decimalPad)
}
Section(header: Text("Enter your Weight in kg")){
TextField("Input",text: $weight)
.keyboardType(.decimalPad)
}
Section(header: Text("Check result")){
Text("\(inputAfterConvertions, specifier: "%.2f")")
}
}
.navigationBarTitle("BMI")
.navigationBarItems(trailing:
Button(action: {
presentationMode.wrappedValue.dismiss()
}) {
Image(systemName: "xmark").font(.title).foregroundColor(.blue)
}
)
}
}
}
Thank you very much for your time