如何在SwiftUI中定义GeometryReader内部的变量

struct ContentView: View {
    var body: some View {
        GeometryReader { geometry in
            VStack {
                Text("Width: \(geometry.size.width)")
                Text("Height: \(geometry.size.height)")
                // 在GeometryReader内部定义的变量
                Text("Variable: \(self.variable)")
            }
        }
    }
    
    @State private var variable: String = "Hello, World!"
}

struct ContentView: View {
    @State private var variable: String = "Hello, World!"
    
    var body: some View {
        GeometryReader { geometry in
            VStack {
                Text("Width: \(geometry.size.width)")
                Text("Height: \(geometry.size.height)")
                // 在GeometryReader内部访问和修改的变量
                Text("Variable: \(self.$variable.wrappedValue)")
            }
        }
    }
}