https://github.com/amzd/publishedobject

A property wrapper that forwards the objectWillChange of the wrapped ObservableObject to the enclosing ObservableObject's objectWillChange.
https://github.com/amzd/publishedobject

combine combine-framework property-wrapper swift-package-manager swiftui

Last synced: about 1 month ago
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A property wrapper that forwards the objectWillChange of the wrapped ObservableObject to the enclosing ObservableObject's objectWillChange.

• Host: GitHub
• URL: https://github.com/amzd/publishedobject
• Owner: Amzd
• License: mit
• Created: 2020-07-20T09:09:56.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2024-10-05T06:15:59.000Z (3 months ago)
• Last Synced: 2024-10-28T11:52:11.642Z (about 2 months ago)
• Topics: combine, combine-framework, property-wrapper, swift-package-manager, swiftui
• Language: Swift
• Homepage:
• Size: 28.3 KB
• Stars: 31
• Watchers: 2
• Forks: 7
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# 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.

```swift

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.