From e2994b78c49a382db95c3c72f388142d3097c1ef Mon Sep 17 00:00:00 2001
From: Kenta Kubo <601636+kkebo@users.noreply.github.com>
Date: Wed, 30 Apr 2025 01:33:04 +0900
Subject: [PATCH] fix: fix errors when running on Swift Playground

`NEDNSSettingsManager` APIs are not supported on Swift Playground's App
Preview.
---
 DNSecure/Views/ContentView.swift | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/DNSecure/Views/ContentView.swift b/DNSecure/Views/ContentView.swift
index ed4e0d2..07a508d 100644
--- a/DNSecure/Views/ContentView.swift
+++ b/DNSecure/Views/ContentView.swift
@@ -67,6 +67,11 @@ struct ContentView {
 
     private func updateStatus() {
         #if !targetEnvironment(simulator)
+            // Early return if running on Swift Playground or Xcode Previews
+            guard ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != "1" else {
+                return
+            }
+
             let manager = NEDNSSettingsManager.shared()
             manager.loadFromPreferences {
                 if let err = $0 {
@@ -85,6 +90,11 @@ struct ContentView {
         }
 
         #if !targetEnvironment(simulator)
+            // Early return if running on Swift Playground or Xcode Previews
+            guard ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != "1" else {
+                return
+            }
+
             let manager = NEDNSSettingsManager.shared()
             manager.dnsSettings = server.configuration.toDNSSettings()
             manager.onDemandRules = server.onDemandRules.toNEOnDemandRules()
@@ -111,6 +121,11 @@ struct ContentView {
         self.usedID = nil
 
         #if !targetEnvironment(simulator)
+            // Early return if running on Swift Playground or Xcode Previews
+            guard ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] != "1" else {
+                return
+            }
+
             let manager = NEDNSSettingsManager.shared()
             guard manager.dnsSettings != nil else {
                 // Already removed