PublishedObject
A property wrapper that forwards the objectWillChange of the wrapped ObservableObject to the enclosing ObservableObject's objectWillChange.
Just like @Published this sends willSet events to the enclosing ObservableObject's ObjectWillChangePublisher but unlike @Published it also sends the wrapped value's published changes on to the enclosing ObservableObject.
class Outer: ObservableObject {
@PublishedObject var innerPublishedObject: Inner
@Published var innerPublished: Inner
init(_ value: Int) {
self.innerPublishedObject = Inner(value)
self.innerPublished = Inner(value)
}
}
class Inner: ObservableObject {
@Published var value: Int
init(_ int: Int) {
self.value = int
}
}
func example() {
let outer = Outer(1)
// Setting property on Outer (This will send an update with either @Published or @PublishedObject)
outer.innerPublishedObject = Inner(2) // outer.objectWillChange will be called
outer.innerPublished = Inner(2) // outer.objectWillChange will be called
// Setting property on Inner (This will only send an update when using @PublishedObject)
outer.innerPublishedObject.value = 3 // outer.objectWillChange will be called !!!
outer.innerPublished.value = 3 // outer.objectWillChange will NOT be called
}It's only one file so you could just copy it. Also has Swift Package Manager support.