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tovkal/CustomNavigation.swift

Created June 6, 2024 11:00
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How to implement NavigationLink's destination parameter without a closure?
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CustomNavigation.swift
import PlaygroundSupport
import Foundation
import SwiftUI
struct SomeView: View {
var body: some View {
Text("Some")
}
}
struct MyNavigationLink<Destination: View>: View {
let destination: () -> Destination
init(@ViewBuilder destination: @escaping () -> Destination) {
self.destination = destination
}
var body: some View {
NavigationLink(destination: destination) {
Text("Some label")
}
}
}
// What I want
MyNavigationLink(destination: SomeView())
// With a closure it compiles
MyNavigationLink(destination: { SomeView() })
// This is the native component
NavigationLink(destination: SomeView(), label: { Text("Some label") })
@tovkal
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tovkal commented Jun 6, 2024 

struct MyNavigationLink<Destination: View>: View {
    let destination: () -> Destination

    init(
        @ViewBuilder destination: @escaping () -> Destination
    ) {
        self.destination = destination
    }

    init(destination: Destination) {
        self.destination = { destination }
    }

    var body: some View {
        NavigationLink(destination: destination) {
            Text("Some label")
        }
    }
}

Adding the second init fixes the problem. This init is not in Apple's docs, but you can see it if you go into NavigationLink's code.

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