This is what I tried to do. I am not sure what is wrong. anyone got ideas?
let data: Data? = try? JSONSerialization.data(withJSONObject: "")
and it says
reason: '*** +[NSJSONSerialization dataWithJSONObject:options:error:]: Invalid top-level type in JSON write'
even if i put in "{}" error is the same. thoughts?
Purpose for this is i want set this to a URLRequest.httpBody
Thoughts?
Post not yet marked as solved
Apple docs does not have a sample that does this. What do i need to use. My line chart has too many points in the x axis. How to lessen them?
I saw something about
Chart {
}
.chartXAxis {
// Is this the right property? What should go in here?
}
Post not yet marked as solved
struct TideForecastInfoView: View {
var geometryProxy: GeometryProxy
var body: some View {
VStack {
getHeaders(geometryProxy)
TideForecastEntryView(geometryProxy: geometryProxy)
.padding(2)
}
.background(.white)
.clipShape(RoundedRectangle(cornerRadius: 14))
.shadow(radius: 8)
}
@ViewBuilder
func getHeaders(_ geometryProxy: GeometryProxy) -> some View {
HStack {
HStack {
Text("tide")
.frame(maxWidth: geometryProxy.size.width * 0.25)
Text("time")
.frame(maxWidth: geometryProxy.size.width * 0.5)
Text("height")
.frame(maxWidth: geometryProxy.size.width * 0.25)
}
.padding(8)
}
.frame(maxWidth: .infinity)
.background(.gray)
}
}
struct TideForecastEntryView: View {
var geometryProxy: GeometryProxy
var body: some View {
HStack {
Text("High Tide")
.frame(maxWidth: geometryProxy.size.width * 0.25)
Text("1:08 AM (Tue 03) January")
.frame(maxWidth: geometryProxy.size.width * 0.5, alignment: .leading)
Text("1.31 m (4.3 ft)")
.frame(maxWidth: geometryProxy.size.width * 0.25)
}
}
}
Result looks like this
03 should be on the first line and maybe parts of the January word. is there something else missing in the Text view option that i need to declare?
Also how to vertical align top for text High Tide. it is always vertically centered. I tried to set alignment: .top in the frame but doesnt do anything.
Thoughts?
Post not yet marked as solved
I have a model struct
struct Temp {
var cityUrlId: String {
get {
print(_cityUrlId)
print("gettting="+StringTool.nullToString(_cityUrlId).trim())
return _cityUrlId
}
set(newValue) {
print("newvalue="+newValue)
_cityUrlId = _cityUrlId
print("_cityUrlId="+_cityUrlId!)
}
}
}
The parent view has a state variable e.g.
@State var temp: Temp
and a child view as a new window with @Binding var temp: Temp
My question is that when the temp in child view sets a value for cityUrlId property, it's ok. but once i set a new value in the parent view, the getter returns nil. why is that?
is the solution for this have to be a class for Temp instead of a struct?
Hi. I am having issues with json parsing. all my source data use double quote except for one.
here is the sample
do {
let json = "[['16772', 'Cebu', 'Philippines']]"
if let jsonArray = try JSONSerialization.jsonObject(with: Data(json.utf8), options: []) as? [[Any]] {
print("Hello World")
}
} catch {
print(error)
}
if the json string is
let json = "[[\"16772\", \"Cebu\", \"Philippines\"]]"
it works ok. but if it is single quote, then it gives out the error message
Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around line 1, column 2." UserInfo={NSDebugDescription=Invalid value around line 1, column 2., NSJSONSerializationErrorIndex=2}
What am i missing to enable parsing single quote normally? Thoughts?
Hi. I have no clue what I am doing wrong or am i missing something else. I keep getting the error message
CoreData: error: Failed to load model named DMTideCity
Please see attached image for data model. My goal is just to load this but I dont know why I keep getting that error message.
struct TideDataController {
static let shared = TideDataController()
let cityContainer: NSPersistentContainer
init() {
print("init")
cityContainer = NSPersistentContainer(name: "DMTideCity")
print(cityContainer)
cityContainer.loadPersistentStores { description, error in
if let error {
print("Core Data Citys failed to load: \(error.localizedDescription)")
}
else {
print("Core Data Citys loaded")
}
}
}
}
In my view, i declare a variable like this
let tideDataController = TideDataController.shared
So it never reaches the print(cityContainer) because of that error message.
Thoughts?
Post not yet marked as solved
Hi. My view gets animated with a call frmo a block of code withAnimation.{ }
how can i place this inside the view so that the binding variable will be the one to trigger the animation. Same as how sheets work.
THis is my sample view
import SwiftUI
struct GradientLegendView: View {
@Binding var isShowingLegend: Bool
var labels: [String]?
var colors: [Color]?
var width: Float
var height: Float
var viewRect = Rectangle()
var body: some View {
if isShowingLegend {
HStack {
VStack {
if let labels {
ForEach(labels, id:\.self) { label in
Text(label)
.frame(maxWidth: .infinity, alignment: .leading)
.font(.system(size: 14))
.foregroundColor(.black)
.backgroundStyle(.red)
.padding(0)
if label != labels.last {
Spacer()
}
}
}
}
.frame(maxHeight: .infinity)
.padding(8)
Rectangle()
.foregroundColor(.clear)
.background(LinearGradient(gradient: Gradient(colors: colors ?? []), startPoint: .top, endPoint: .bottom))
.padding(8)
.frame(width: 30)
}
.frame(width: CGFloat(width), height: CGFloat(height))
.background(.white.opacity(0.7))
.cornerRadius(5)
.shadow(color: Color.gray.opacity(0.7), radius: 8, x: 0, y: 0)
.padding()
.transition(.move(edge: isShowingLegend ? .leading : .trailing))
}
}
}
struct GradientLegendView_Previews: PreviewProvider {
static var previews: some View {
GradientLegendView(
isShowingLegend: .constant(true),
labels: SampleData.createHeatmapLegendLabelArray(),
colors: SampleData.createHeatmapLegendColorArray(),
width: 120,
height: 200
)
}
}
struct Sample {
static func createHeatmapLegendLabelArray() -> [String] {
return ["Great", "Major", "Strong", "Moderate", "Small"]
}
func createHeatmapLegendColorArray() -> [Color] {
return [.red, .purple, .orange, .green]
}
}
And i use it here and run the animation using withAnimation { }
@State private var isShowingLegend = true
var body: some View {
Text("Hey")
.frame(maxWidth: .infinity, maxHeight: .infinity)
.edgesIgnoringSafeArea(.all)
.task {
setupMenuItems()
}
.overlay(
HStack {
GradientLegendView(
isShowingLegend: $isShowingLegend,
labels: SampleData.createHeatmapLegendLabelArray(),
colors: SampleData.createHeatmapLegendColorArray(),
width: 120,
height: 200)
Spacer()
},
alignment: .bottom
)
}
Now, say i also have a button instead of Text("hey") where the action code is
withAnimation(isShowingLegend ? .easeIn(duration: 0.5) : .easeOut(duration: 0.5)) {
isShowingLegend.toggle()
}
Is it possible that this withAnimatoin be placed inslide GradientLegendView and will execute if the isShowingLegend value is change?
I have a function like this
@ViewBuilder
func addInfo(_ text: String, action: (() -> Void)?, addDivider: Bool = true, centerAlignment: Bool = false, isBold: Bool = false) -> some View {
VStack {
Text(text)
.fontWeight(isBold ? .bold : .regular)
.frame(maxWidth: .infinity, alignment: centerAlignment ? .center : .leading)
.padding([.leading, .trailing], 10)
.padding([.top, .bottom], 5)
.contentShape(Rectangle())
.onTapGesture {
if let action {
action()
}
}
if addDivider {
Divider()
}
}
}
I do not understand why i get a compile error
Expected type after '->'
if i call the function like this
addInfo("Sample", action: () -> Void {
})
The error points to Void. What is the correct way to do this? Please advise.
I am not really sure what is the cause but this happens if i overwrite values. if i clear the app from scratch and store them all it works ok. Thoughts?
my exact message is Attempting to store >= 4194304 bytes of data in CFPreferences/NSUserDefaults on this platform is invalid
Description of keys being set:
holocene_update: string value, approximate encoded size: 25
Description of keys already present:
holocene: string value, approximate encoded size: 5216090
GMSMapsUserClientZwiebackCookie: string value, approximate encoded size: 175
GMSMapsUserCookie: data value, size: 48
kGMSServerVersionMetadataTrackerSavedServerVersionMetadataKey: data value, size: 30
holocene_update: string value, approximate encoded size: 25
com.google.Maps.GMSCoreLastVersion: string value, approximate encoded size: 6
cyclone_alert_last: string value, approximate encoded size: 5
com.google.Maps.GMSSDKLastVersion: string value, approximate encoded size: 5
GMSMapsUserClientCohort: string value, approximate encoded size: 4
kGMSMapsUserClientLegalCountry: string value, approximate encoded size: 2
...
Total keys: 12 - Average approximate value size: 434699 bytes
2022-12-19 17:49:08.777899+0800 PH Weather And Earthquake Updates[31305:4102377] [User Defaults] CFPrefsPlistSource<0x600002b80980> (Domain: ************, User: kCFPreferencesCurrentUser, ByHost: No, Container: (null), Contents Need Refresh: No): Transitioning into direct mode
Is there a way to increase this limit? I need to store data.
Post not yet marked as solved
Hi, i wish to ask for suggestions. I am in a dilemna using an environment object. Please see code.
struct ContentView: View {
@State var show = false
@StateObject var appData = AppData()
@StateObject var toolbarData = ToolbarData()
var body: some View {
NavigationStack(path: $appData.path) {
ZStack(alignment: .leading) {
VStack(spacing: 0) {
HStack {
Button(action: {
withAnimation(.default) {
show.toggle()
}
}) {
Image(systemName: "line.3.horizontal")
}
Text("Home")
Spacer()
ToolbarView()
OverflowMenu()
.padding([.leading], Default.instance.PADDING_BETWEEN_MENU_ITEM)
}
.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)
}
.environmentObject(toolbarData)
.background(Color.primary.opacity(self.show ? (self.dark ? 0.05 : 0.2) : 0))
}
.navigationBarHidden(true)
}
.navigationViewStyle(.stack)
.environmentObject(appData)
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
struct ToolbarView: View {
@Binding var toolbarData: ToolbarData
var body: some View {
HStack {
if let item = toolbarData.toolbarItem, item.visible {
Button {
item.action()
} label: {
if let iconLink = item.iconLink {
NavigationLink(destination: iconLink) {
Image(systemName: item.icon)
}
}
else {
Image(systemName: item.icon)
}
}
.disabled(item.disabled)
.opacity(item.opacity)
.padding([.leading, .trailing], Default.instance.PADDING_BETWEEN_MENU_ITEM)
}
}
}
final class ToolbarData: ObservableObject {
@Published var toolbarItem: ToolbarItemProperties?
}
final class ToolbarItemProperties {
var disabled = false
}
In the MainContent , my code runs this
toolbarData.toolbarItemProperties.disabled = false
I do not want MainContent to be rebuilt. Inside MainContent, I modify toolbarItemProperties (from an environment object). And i call objectWillChange.send(). Problem is, it will rebuild the ContentView widget including MainContent.
What can be the correct approach to having to eb able to change the value of toolbarItemProperties and rebuild it but ignoring MainContent to rebuild again.
Thoughts?
Post not yet marked as solved
Ive read posts where you can pass 2 .environmentObject()
but what i noticed is that if i call object1.objectWillChange.send() , object2 also is affected
is this normal? or supposedly only published properties of object1 only gets affected?
discussion quwstion. thoughts?
Post not yet marked as solved
struct Test {
var body: some View {
AsyncView(
operation: { try await getData("https://localhost") },
content: { json
Text("data retrieved")
}
)
}
func getData(_ url: String) async throws -> String {
return try await getRequest(url)
}
}
static func getRequest(_ sourceData: String?, _ useWindowsChar1252: Bool = false) async throws -> String {
guard let sourceData else {
return ""
}
var request = URLRequest(url: URL(string: sourceData.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)!)
request.httpMethod = "get"
let (data, _) = try await URLSession(configuration: .ephemeral).data(for: request)
return useWindowsChar1252 ?
String(data: data, encoding: .windowsCP1252)! :
String(decoding: data, as: UTF8.self)
}
You can just have one tab item in the TabView and the http request keeps on looping. any idea?
struct MyTabView: View {
var body: some View {
TabView {
Test()
.tabItem {
Label("test", systemImage: "leaf")
}
}
}
}
Trying to understand the cause. Because If I put the AsyncView, say inside a ZStack, it works ok.
Thoughts?
Hi. this is my observable object
final class ToolbarItemProperties: ObservableObject {
var visible = false
var disabled = false
var icon = "questionmark"
var action: () -> Void = { }
var opacity: Double = 1
}
the opacity property value should either be 0.5 or 1 depending on the value of the property disabled. How to listen to it?
The purpose for this is because if i set a button to disabled, it does not render any way to the user to let them know it is disabled. So i thought of changing the opacity instead, hence the opacity property.
So if i do something like this
item.disabled = true
the opacity property value should become 0.5. if disabled is set to false, the opacity value will be 1.
Post not yet marked as solved
I want to have a property in a struct/class where it is of type custom View
e.g.
var view: some View?
So many issues here, I ended up doing
var view: AnyView?
But i got stuck here because whenever I assign a value to this, the app crashes. saying
Could not cast value of type '__NSCFNumber' (0x7fdcdf9c3480) to 'NSString' (0x1192bac50).
This i do not understand
view should be some view so it si neither number nor string. any idea why?
also. if i do this
var view: (some View)?
it is ok. but when i set a value to that property it says Cannot assign value of type 'DailyCityReportView' to type 'some View'
My goal is to pass a custom view to a property.
Hi. I am using Kingfisher library to load images. My problem is that when i resize the width, the calculated height does not follow. the height of the image when displayed is still short.
What could possibly be wrong in my code?
import SwiftUI
import Kingfisher
struct MyView: View {
var geometryProxy: GeometryProxy
var body: some View {
HStack {
HStack {
KFImage.url(URL(string: "https://volcano.si.edu/gallery/photos/GVP-11076.jpg"))
.cancelOnDisappear(true)
.fade(duration: 0.25)
.resizable()
.scaledToFit()
}
.frame(maxWidth: geometryProxy.size.width * 0.4, maxHeight: getHeight(Float(geometryProxy.size.width) * 0.4, Float(geometryProxy.size.height), Float(geometryProxy.size.width)))
Text("Text 1 Label")
.frame(maxWidth: geometryProxy.size.width * 0.65, alignment: .topLeading)
.padding(.leading, 10)
.padding(.top, 3)
Image(systemName: "chevron.right")
.frame(maxWidth: geometryProxy.size.width * 0.05)
.padding(.leading, 0)
}
.contentShape(Rectangle())
}
private func getHeight(_ imageWidth: Float, _ imageHeight: Float, _ screenWidth: Float) -> CGFloat {
// let ratio = Float(placeholder!.size.height / placeholder!.size.width)
// print(ratio)
// print(ratio * width)
// print("______")
// return CGFloat(ratio * width)
let ratio = screenWidth / imageWidth
return CGFloat(imageHeight * ratio)
}
}
The Image should expand since i set the width of the image to at least 40% of the screen width.
Or could my calculation for getting the height may be wrong? Thougts?
chitgoks.