How to set addObserver in SwiftUI?

Question

How do I add NotificationCenter.default.addObserve in SwiftUI?

When I tried adding observer I get below error

Argument of \'#sele

Answer 1

I have one approach for NotificationCenter usage in SwiftUI.

For more information Apple Documentation

Notification extension

extension NSNotification {
    static let ImageClick = NSNotification.Name.init("ImageClick")
}

ContentView

struct ContentView: View {
    var body: some View {
        VStack {
            DetailView()
        }
        .onReceive(NotificationCenter.default.publisher(for: NSNotification.ImageClick))
        { obj in
           // Change key as per your "userInfo"
            if let userInfo = obj.userInfo, let info = userInfo["info"] {
              print(info)
           }
        }
    }
}

DetailView

struct DetailView: View {
    var body: some View {
        Image(systemName: "wifi")
            .frame(width: 30,height: 30, alignment: .center)
            .foregroundColor(AppColor.black)
            .onTapGesture {
                NotificationCenter.default.post(name: NSNotification.ImageClick, 
                                                object: nil, userInfo: ["info": "Test"])
        }
    }
}