我可以将Bool作为环境对象传递给SwiftUI中的subView吗？

Question

I have a bool

@State var isDragging: Bool

How can I pass this as an environment object to subViews?

Answer 1

You need to create an ObservableObject:

class Model: ObservableObject {
    @Published var isDragging: Bool = false
}

And then use:

struct MyView: View {
    @EnvironmentObject var mymodel: Model

    var body : some View {
        if mymodel.isDragging { ... }
    }
}

And also, you should watch to WWDC 2019 session "Data Flow in Swift". Although some of the type names have been changed since, the concepts remain the same.