Questions tagged [swiftui-state]
47 questions
1
vote
2 answers
Update SwiftUI Date Picker to match a model's computed property: Cannot assign to property
I have a form which lets the user create a project. In this form, I want to automatically change the project's deadline DatePicker based on the user's input such as start date, daily count, and target count. If the DatePicker's date is changed, then…
Michael Hsieh
- 67
- 8
1
vote
1 answer
Create array of state objects in SwiftUI
In my project I have a 2D array of my custom class, GridTile representing a grid. This is the class:
import Foundation
import SwiftUI
class GridTile: ObservableObject {
@Published var tileNumber = 0
var tileFrame = CGRect.zero
var…
JackElia
- 140
- 9
1
vote
1 answer
SwiftUI - view expand from the bottom of frame
I'd like to display a number of values as a continuous value from 0 to 1. I'd like them to grow from the bottom up, from 0 displaying no value, to 1 displaying a full height.
However, I'm unable to make it "grow from the bottom". I'm not sure what a…
Hoopes
- 3,943
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1
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1 answer
Multiple View transition animations not happening at once
Very early into SwiftUI programming, I am basically trying to show a list of cards inside a container view, with the top most one being shown... Each card has a text view and when tapped the card view is removed from the stack/container view and the…
Prasad
- 166
- 7
1
vote
1 answer
How to avoid SwiftUI Initial View getting initialized multiple times when @State variables are initialized?
struct GroceryList: View {
@ObservedObject var coreDataViewModel:CoreDataViewModel = CoreDataViewModel()
@StateObject var userPreferences: UserPreferences = UserPreferences()
@State private var selectedItemsInList: [GroceryItem] = []
@State…
udGlobal
- 17
- 7
1
vote
0 answers
How do I pass a @State binding to the Content closure of a custom container?
I'm starting to play with custom containers and I'm stuck trying to send the @State var across. Sample code:
struct ZoomCardView: View {
let contentDefault: ((Binding)) -> Content
let contentZoomed: (Binding) ->…
titusmagnus
- 2,014
- 3
- 23
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1
vote
2 answers
Generating views from API call - SwiftUI
I'm new to SwiftUI, and was wondering if someone could help me make my app work. Also I'm trying to get my head around MVVM, and was wondering if I was doing it correctly.
The app makes a call to https://jsonplaceholder.typicode.com/users and I'm…
Cesar Marcial
- 77
- 6
1
vote
1 answer
SwiftUI State Variable not Rendering View Unless Used Inside View (verses in modifier)
Sorry for terrible wording, but in onAppear I am changing a State variable, however this does not re-render the view unless I use that State variable somewhere inside the view.
I am trying to pop a modal if the user is not logged in, but it won't…
connorvo
- 761
- 2
- 7
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1
vote
1 answer
SwiftUI State value doesn't change
I am not familiar with State. I tested the code:
import SwiftUI
class TestState {
@State var a: Int = 3
func increaseA() {
print("before \(a)") //3
a += 1
print("after \(a)") //3?
}
}
TestState().increaseA()
It…
蘇哲聖
- 735
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- 17
1
vote
1 answer
SwiftUI animate all except .foregroundColor
Based on the value of a @State var, how can I animate any other parameters but one? For instance, I want to animate .offset but not the .foregroundColor. It may sound like an easy task to do, but it's not so easy when using the same "base view" to…
Aнгел
- 1,361
- 3
- 17
- 32
1
vote
1 answer
SwiftUI - Change View variable based on input parameter
How do I change the @State variable size in a view based on the input parameter categorySize supplied when calling the view?
I'd like to change the size to 140 when categorySize == .Large and to 40 when categorySize == .Small.
enum ExampleEnum {
…
Peanutsmasher
- 220
- 3
- 13
0
votes
0 answers
SwiftUI changing State variable in code does not refresh list
I have a list of matches and when I type in the filter (TextField) it works fine. I also have a list of players the user can pick from. When they choose a player the func playerFilterChanged is called and usernameSearch is updated from the…
Brian Kalski
- 897
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votes
0 answers
SwiftUI Button animation
I use ButtonStyle, for button style. But when I updated button from enable to disable, and change thread, the button change without animation.
//I have ButtonStyle:
struct WizardButtonStyle: ButtonStyle {
enum Style { case enabled, disabled }
…
Medoed
- 1
- 3
0
votes
1 answer
NavigationView doesn't update when @State changes (NavigationStack works well)
I encountered this situation when trying to replace my NavigationStack (iOS 16+) by a NavigationView (for backward compatibility reasons). What I hoped for would be that NavigationStack and NavigationView would have similar behavior since Swift UI…
IMAGE-ET
- 13
- 3
0
votes
2 answers
SwiftUI State in Preview with PreviewProvider is not working
I've a simple button that work on simulator as expected, the shape changes with click;
struct ButtonTest: View {
@State var isLiked = true
var body: some View {
VStack {
LikeButtonSimple( action: toggleLiked, isLiked:…
kelalaka
- 5,064
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