brentmifsud / asyncvalue Goto Github PK
View Code? Open in Web Editor NEWA simple swift package that provides a Swift Concurrency equivalent to `@Published`.
License: MIT License
A simple swift package that provides a Swift Concurrency equivalent to `@Published`.
License: MIT License
Remembering to add a willSet
to all of your async value properties is not all that user friendly. I think we can do better:
// this might not be needed with the new swift 5.7 generics. Will investigate. When Xcode 14 is released.
internal protocol AnyAsyncValue {
var projectedValue: AsyncSequence<Any>
}
internal extension AsyncValue: AnyAsyncValue {
var projectedValue: AsyncSequence<Any> {
projectedValue
}
}
@MainActor open class AsyncObservableObject: ObservableObject {
private var objectWillChangeTasks: [Task<Void, Never>] = []
init() {
setupObjectWillChangeTasks()
}
deinit {
for task in objectWillChangeTasks {
task.cancel()
}
}
private func setupObjectWillChangeTasks() {
let mirror = Mirror(reflecting: self)
for child in mirror.children {
if let asyncValue = child.value as? AnyAsyncValue {
let task = Task {
for await _ in asyncValue.projectedValue {
objectWillChange.send()
}
}
objectWillChangeTasks.append(task)
}
}
}
}
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