I had a simple class called Entry with one field (timestamp: Date) and I tried to add a new field without having to uninstall the app , so I would not crash.
I tried implementing the MigrationPlan stuff but I do not know if I have to manually add a value to the new field or how exactly it works.
Here is my code.
When I use the EntrySchemaV0 it works fine but if I try to use the V1 it crashes. (could not fetch ModelContainer)
I also tried it with a custom migration stage. Crashes with error (SwiftData/BackingData.swift:432: Fatal error: Expected only Arrays for Relationships - String)
import Foundation
import SwiftData
enum EntrySchemaV0: VersionedSchema {
static var versionIdentifier = Schema.Version(0, 1, 0)
static var models: [any PersistentModel.Type] {
[Entry.self]
}
@Model
final class Entry {
var timestamp: Date
init(timestamp: Date) {
self.timestamp = timestamp
}
}
}
enum EntrySchemaV1: VersionedSchema {
static var versionIdentifier = Schema.Version(0, 2, 0)
static var models: [any PersistentModel.Type] {
[Entry.self]
}
@Model
final class Entry {
var name: String
var timestamp: Date
init(name: String = "", timestamp: Date = .now) {
self.name = name
self.timestamp = timestamp
}
}
}
enum EntryMigrationPlan: SchemaMigrationPlan {
static var schemas: [any VersionedSchema.Type] {
[EntrySchemaV0.self, EntrySchemaV1.self]
}
static var stages: [MigrationStage] {
[migrateV0toV1]
}
static let migrateV0toV1 = MigrationStage.lightweight(
fromVersion: EntrySchemaV0.self,
toVersion: EntrySchemaV1.self
)
}
H073
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
The code that has the issue is this
ZStack {
Image(systemName: icon.isEmpty ? "book.pages.fill" : icon)
.resizable()
.scaledToFit()
.scaleEffect(2.5)
.foregroundStyle(.ultraThickMaterial)
}
the book.pages.fill is completely blurry and the lung is partly blurred.
If I remove the .forgroundStyle(.ultraThickMaterial) is is completely blurred.
Some icons, tho, are sharp no matter the forgroundStyle is omitted or not.
COULD NOT UPLOUD IMAGE
Here is the complete code
import SwiftUI
struct FolderOverviewItemView: View {
@Environment(\.colorScheme) var colorScheme
@Environment(\.horizontalSizeClass) private var horizontalSizeClass
@Environment(\.verticalSizeClass) private var verticalSizeClass
var title: String
var description: String
var icon: String
var image: Image? = Image("dummy")
var color: Color
var body: some View {
Grid {
GridRow() {
Color.clear
Color.clear
Color.clear
Color.clear
}
GridRow() {
Color.clear
ZStack {
Image(systemName: icon.isEmpty ? "book.pages.fill" : icon)
.resizable()
.scaledToFit()
.scaleEffect(2.5)
.foregroundStyle(.ultraThickMaterial)
}
.gridCellColumns(2)
Color.clear
}
GridRow() {
Color.clear
Color.clear
Color.clear
Color.clear
}
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
GridRow() {
HStack(alignment: .top) {
VStack(alignment: .leading) {
Text(title)
.font(.headline)
.lineLimit(1, reservesSpace: true)
if horizontalSizeClass == .regular {
Text(description.isEmpty ? " " : description)
.font(.caption)
.lineLimit(2, reservesSpace: true)
.truncationMode(.tail)
} else {
Text(description.isEmpty ? " " : description)
.font(.caption)
.lineLimit(2, reservesSpace: true)
.truncationMode(.middle)
}
}
}
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
.gridCellColumns(4)
.padding()
.background(.regularMaterial)
}
}
.background(
LinearGradient(gradient: Gradient(colors: [color.darken(by: -0.2), color.darken(by: 0.1)]), startPoint: .topLeading, endPoint: .bottomTrailing)
)
}
}