[SOLVED] In a Swift app, I want to create a class that holds data that can be updated and displayed across multiple SwiftUI views

In a Swift app, I want to create a class that holds data that can be updated and displayed across multiple SwiftUI views

Here's the class:

class DataManager {
    static let shared = DataManager()

    var data: String = "Initial"
        
    private init() {}

    func updateData(newData: String) {
        self.data = newData
    }
}

let sharedManager = DataManager.shared

I update the data property in one view based with an onTapGesture in that view:

sharedManager.updateData(newData: "New")

When I check the value of sharedManager.data in that view, it is updated.

But when I look at sharedManager.data in a different view, it is not updated. How can I update that code to get it to work as expected: Update a property of an instance of a class in one view, have the update show in another?

Solution

SwiftUI may not be updating the other views because your class is not set up for observation.

Try adding the @Observable macro:

@Observable
class DataManager {
...