Hi. This short code for Kingfisher goes like this
KingfisherManager.shared.retrieveImage(with: ImageResource(downloadURL: URL(string: "URL HERE")!)) { result in
switch result {
case .success(let value):
break
default:
break
}
}
I am actually interested in .success only but if i remove default it will show an error message like Switch must be exhaustive.
How to make this an if statement that goes something like this
if result == .success {
how to get value in scope here so i can use it. thoughts?
}
chitgoks
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So you can unwrap an optional like this
if let var1 {
}
else {
}
What is the opposite for this one such that I only want to put code in the else.
Should I go with
if var1 == nil {
}
or is there something close like
if !(let var1) {
}
Thoughts?
I wish to ask for suggestions how to go about how to fetch data once it is successful in a swift ui view.
Where is it best to put it? What annotation is best suited for this?
I have a map view and it fetches data first before showing marker annotations. I put it in onAppear. This may work if it is just 1 view. But if this view is used inside a TabView, then once the tab is selected, the onAppear block will be executed and will be fetched again.
What is the best way to go about this by fetching the data only once? Thoughts?
var body: some View {
TabView {
MapView(cameraUpdate: ...)
.onAppear() {
// fetch data here.
}
.onDisappear() {
}
.tabItem {
Label("tab2, systemImage: "list.dash")
}
MapView(cameraUpdate: ...)
.onAppear() {
}
.onDisappear() {
}
.tabItem {
Label("tab2, systemImage: "list.dash")
}
}
.onAppear() {
}
}
Hi, beginner here. So I have read how 1 way to use an optional without having to be forced to unwrap it with ! is this ...
if let var1 = optionalVar1 {
}
This is not a prob. But what if i have too many optionals? I do not want to have nested if let blocks. Is there a shorter way not to do too many ifs that without having to unwrap it with ! ?
e.g.
if let var1 = optionalVar1 {
if let var2 = optionalVar2 {
if let var3 = optionalVar3 {
}
}
}
Hi. This is my MapView code
import SwiftUI
import MapKit
struct MapView: UIViewRepresentable {
var region: MKCoordinateRegion
var polylineCoordinates: [CLLocationCoordinate2D]?
func makeUIView(context: Context) -> MKMapView {
let mapView = MKMapView()
mapView.delegate = context.coordinator
mapView.region = region
if let polylines = polylineCoordinates {
let polyline = MKPolyline(coordinates: polylines, count: polylines.count)
mapView.addOverlay(polyline)
}
return mapView
}
func updateUIView(_ view: MKMapView, context: Context) {
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
}
class Coordinator: NSObject, MKMapViewDelegate {
var parent: MapView
init(_ parent: MapView) {
self.parent = parent
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
if overlay is MKPolyline {
let routePolyline = overlay as! MKPolyline
let renderer = MKPolylineRenderer(polyline: routePolyline)
renderer.strokeColor = UIColor.white
renderer.lineWidth = 2
return renderer
}
return MKOverlayRenderer()
}
}
If i do this
var body: some View {
MapView(region: [array of CLLocationCoordinage2D])
.edgesIgnoringSafeArea(.all)
}
it works since the value of the region property is set in the constructor. However, what i want is to set the region property in the onAppear closure. What is lacking here since it does not work.
I wish to do something like this
var body: some View {
MapView(region: region)
.edgesIgnoringSafeArea(.all)
.onAppear {
region = [array of CLLocationCoordinage2D]
}
}
I want to apply the same thing to polylineCoordinates property but for now, if I can make it work with region, I am sure the same thing can be applied to polylineCoordinates property.
Thoughts?
Hi, is there a heatmap class that can be used in a SwiftUI Map? I do not want to use MKMapView and I have seen libraries that are not Swifty and does not make use of the new Map()
Tips are welcome on how to go about this? Or if anyone has a sample code?
I basically have an array of CLCoordinate2D and i wish to use that to generate a heatmap in the map.
No Google Maps please. I decidede not to use this since they do not have a SwiftUI version for it.
Is this possible?
I have a class/struct that will store a function that will be used as an action to the button.
e.g.
struct Test {
var action: (() -> Void)?
}
This works
tempfunc() -> Void {
print("clicked it")
}
let test = Test()
test.action = tempfunc
Button("click me", action: test.action)
What I want to do is something like this.
test.action = () -> Void {
print("clicked")
}
Is this possible? If i try that code, error shows up saying "Cannot assign value of type '()' to type '() -> Void'"
Hi. Beginner here. Currently this is how my app looks like. What I wish to do is for every view that gets changed highlighted by the green square border, the menu item in the top horizontal HStack (my so called toolbar) also changes (highlighted in yellow circle).
Currently, I use an ObservedObservable to change the view (green square) via the sidebarmenu.
What is the best approach to the toolbar part? I was thinking that maybe within the child view e.g. SampleMap1, it has a custom menu item view variable which will be shown in the parent view (Where the yellow circle is lcoated) to add the menu item view. But I am not sure how to go about it.
Advise, suggestions appreciated. Thoughts?
These are what i have so far ...
struct MainContent: View {
@ObservedObject var navigationManager : SidebarNavigationManager
var body: some View {
VStack(spacing: 0) {
switch navigationManager.menuCategory {
case .SAMPLE1:
SampleMap1()
case .SAMPLE2:
SampleMap2()
}
}
.navigationBarTitleDisplayMode(.inline)
}
}
And content view looks like this ...
struct ContentView: View {
@StateObject var navigationManager = SidebarNavigationManager()
@State var show = false
var body: some View {
NavigationView {
ZStack(alignment: .leading) {
VStack(spacing: 0) {
HStack {
Button(action: {
withAnimation(.default) {
show.toggle()
}
}) {
Image(systemName: "line.3.horizontal")
}
Spacer()
Text("Home")
Spacer()
// This is where I wish to put like 2 or 3 menu items, default hidden and will show when the child view provides a menu item view with it that will get shown here
OverflowMenu() <-- ordinary view
}
.padding()
.foregroundColor(.primary)
.overlay(Rectangle().stroke(Color.primary.opacity(0.1), lineWidth: 1).shadow(radius: 3).edgesIgnoringSafeArea(.top))
MainContent(navigationManager: navigationManager)
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
HStack {
SideMenuView(show: $show, navigationManager: navigationManager)
.offset(x: self.show ? 0 : -UIScreen.main.bounds.width / 1.2)
Spacer(minLength: 0)
Rectangle().stroke(.clear).frame(width: show ? UIScreen.main.bounds.width - (UIScreen.main.bounds.width / 1.2) : 0)
.contentShape(Rectangle())
.onTapGesture {
if (show) {
withAnimation(.default) {
show.toggle()
}
}
}
}
}
.navigationBarHidden(true)
}
.navigationViewStyle(.stack)
}
}
struct SampleText : View {
let text: String
var body: some View {
Text(text)
}
}
I have the coordinate for northeast, southwest and center coordinates for a country Philippines
but it does not zoom in there. This is the code I am using in OnAppear in the map view
@State private var region = MKCoordinateRegion()
var body: some View {
Map(coordinateRegion: $region)
.edgesIgnoringSafeArea(.all)
.onAppear() {
region = MapTool.getPARCoordinateRegion()
}
}
static func getPARCoordinateRegion() -> MKCoordinateRegion {
let ph = getPHCountryPlaceMark()
let southWestPoint = MKMapPoint(x: ph.southWestLongitude, y: ph.southWestLatitude)
let northEastPoint = MKMapPoint(x: ph.northEastLongitude, y: ph.northEastLatitude)
let northWestPoint = MKMapPoint(x: southWestPoint.x, y: northEastPoint.y)
let mapRectWidth = northEastPoint.x - northWestPoint.x
let mapRectHeight = northWestPoint.y - southWestPoint.y
return MKCoordinateRegion(MKMapRect(x: southWestPoint.x, y: southWestPoint.y, width: mapRectWidth, height: mapRectHeight))
}
static func getPHCountryPlaceMark() -> CountryPlaceMark {
let countryPlaceMark = CountryPlaceMark()
countryPlaceMark.longName = "Philippines"
countryPlaceMark.shortName = "PH"
countryPlaceMark.centerLatitude = 12.879721
countryPlaceMark.centerLongitude = 121.774017
countryPlaceMark.southWestLatitude = 4.613444
countryPlaceMark.southWestLongitude = 116.931557
countryPlaceMark.northEastLatitude = 19.574024
countryPlaceMark.northEastLongitude = 126.604384
return countryPlaceMark
}
But instead zooms here. Thoughts?
Regardless if I use a protocol or not that contains this method, e.g. I have this
var test: String?
func setupData() -> Void {
test = "New value"
}
Why does it say
Cannot assign to property: 'self' is immutable"
So if i add mutable to setupData() which becomes "mutating func setupData() { ... }", then i get another error message
Cannot use mutating member on immutable value: 'self' is immutable
I call setupData in onAppear() instead of init() for now. Putting it in init forces me to initialize the variables (sucks)
I am lost on this one. Advise?
This is used inside a Struct View. not a class.
The various posts showing NSAttributedString rendering html tags has become mute because the bold tag does not work anymore.
Anyone know why? Or what the workaround is?
I am using this as the extension in string (found this in stackoverflow)
var htmlAttributedString: NSAttributedString? {
do {
return try NSAttributedString(data: Data(utf8), options: [NSAttributedString.DocumentReadingOptionKey.documentType: NSAttributedString.DocumentType.html], documentAttributes: nil)
} catch {
return nil
}
}
var htmlString: String {
return htmlAttributedString?.string ?? ""
}
Bold just doesnt work. I do not see anything wrong with the code itself. It looks right. But it just does not render bold.
I read about adding style tag in the string with the default apple system font in it hardcoded, tried that but didnt work out still.
I have not seen a tutorial that shows a callout when a marker is clicked in the map.
Can anyone please confirm?
Weird that this feature is not included.
The callout I need is just a simple title and subtitle. That's all. Tutorials only show how to render using MapMarker, MapPin and custom MapAnnotations but these do nothing since they only show icons.
Hi all. I have not found a solution to this.
Showing Recent Issues
GoogleMaps.xcframework' is missing architecture(s) required by this target (arm64), but may still be link-compatible.
So many posts saying go to Build Settings and in debug/release exclude arm64 but there is none here. I am using xcode 13.4.1
Anyone got ideas?
Hi, does anyone have some short code to display a marker with callout? There simply is no updated documentation of it. They are either using old names or I just have not found any tutorial of it.
I only found about MapMarker, but then it only shows a pin. on the map and no callout is possible.
This is what I have
Map(coordinateRegion: $mapRegion, showsUserLocation: true, annotationItems: markers) { marker in
marker.location
}
Where marker.location is MarkerMap. So it displays a pin correctly, but how to add a callout and link to it?
There are so many different names that start with MK. I am not sure if those are the latest. I figure MapAnnotation, MapMarker to name a few are the latest ones.
Hi all, this is my last recourse by posting here since I really could not find a solution to my problem. My issue is that if there is a scrollable lazyVStack in the main content area, or if i cick on the overflow menu button, nothing happens.
the button to show the side menu view works ok though. as is clicking on the rows of the LazyVStack.
The cause of the ZStack top most but I am not sure what the problem is because the issue only occurs if it is in dark mode.
And, the issue only happens if i am in dark mode. Just weird.
This is the code
var body: some View {
NavigationView {
ZStack(alignment: .leading) {
VStack(spacing: 0) {
HStack {
Button(action: {
withAnimation(.default) {
show.toggle()
}
}) {
Image(systemName: "line.3.horizontal")
}
Spacer()
Text("Home")
Spacer()
OverflowMenu()
}
.padding()
.foregroundColor(.primary)
.overlay(Rectangle().stroke(Color.primary.opacity(0.1), lineWidth: 1).shadow(radius: 3).edgesIgnoringSafeArea(.top))
MainContent(navigationManager: navigationManager)
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
HStack {
SideMenuView(dark: $dark, show: $show, navigationManager: navigationManager)
.preferredColorScheme(dark ? .dark : .light)
.offset(x: self.show ? 0 : -UIScreen.main.bounds.width / 1.2)
Spacer(minLength: 0)
Rectangle().stroke(.clear).frame(width: show ? UIScreen.main.bounds.width - (UIScreen.main.bounds.width / 1.2) : 0)
.contentShape(Rectangle())
.onTapGesture {
if (show) {
withAnimation(.default) {
show.toggle()
}
}
}
}
.background(Color.primary.opacity(self.show ? (self.dark ? 0.05 : 0.2) : 0).edgesIgnoringSafeArea(.all))
}
.navigationBarHidden(true)
}
.navigationViewStyle(.stack)
}
OverflowMenuView
struct OverflowMenu: View {
@State var isClickedSettings = false
@State var isClickedAbout = false
@State var isClickedFaq = false
@State var isClickedRemoveAds = false
var body: some View {
VStack {
NavigationLink(destination: SettingView(), isActive: $isClickedSettings) {
EmptyView()
}
.hidden()
NavigationLink(destination: SettingView(), isActive: $isClickedAbout) {
EmptyView()
}
.hidden()
NavigationLink(destination: SettingView(), isActive: $isClickedFaq) {
EmptyView()
}
.hidden()
NavigationLink(destination: SettingView(), isActive: $isClickedRemoveAds) {
EmptyView()
}
.hidden()
Menu {
Button {
isClickedSettings = true
}
label: {
Label {
Text(StringTool.localize("settings"))
}
icon: {
Awesome.Solid.cog.image
.foregroundColor(UIColor(named: "MenuSetting")!)
}
}
Button {
isClickedAbout = true
}
label: {
Label {
Text(StringTool.localize("about"))
}
icon: {
Awesome.Solid.infoCircle.image
.foregroundColor(UIColor(named: "MenuAbout")!)
}
}
Button {
isClickedFaq = true
}
label: {
Label{
Text(StringTool.localize("faq"))
}
icon: {
Awesome.Solid.bookOpen.image
.foregroundColor(UIColor(named: "MenuFaq")!)
}
}
Button {
isClickedRemoveAds = true
}
label: {
Label{
Text(StringTool.localize("remove_ads"))
}
icon: {
Awesome.Solid.unlockAlt.image
.foregroundColor(UIColor(named: "MenuRemoveAds")!)
}
}
} label: {
Image(systemName: "ellipsis.circle")
}
}
}
}
Any Idea?