Initialize Packet Tunnel + Config

ios/SingBoxPacketTunnel/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>BASE_BUNDLE_IDENTIFIER</key>
+	<string>$(BASE_BUNDLE_IDENTIFIER)</string>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.networkextension.packet-tunnel</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).PacketTunnelProvider</string>
+	</dict>
+</dict>
+</plist>

ios/SingBoxPacketTunnel/PacketTunnelProvider.swift

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+//
+//  PacketTunnelProvider.swift
+//  SingBoxPacketTunnel
+//
+//  Created by GFWFighter on 7/24/1402 AP.
+//
+
+import NetworkExtension
+
+class PacketTunnelProvider: NEPacketTunnelProvider {
+
+    override func startTunnel(options: [String : NSObject]?, completionHandler: @escaping (Error?) -> Void) {
+        // Add code here to start the process of connecting the tunnel.
+    }
+    
+    override func stopTunnel(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
+        // Add code here to start the process of stopping the tunnel.
+        completionHandler()
+    }
+    
+    override func handleAppMessage(_ messageData: Data, completionHandler: ((Data?) -> Void)?) {
+        // Add code here to handle the message.
+        if let handler = completionHandler {
+            handler(messageData)
+        }
+    }
+    
+    override func sleep(completionHandler: @escaping () -> Void) {
+        // Add code here to get ready to sleep.
+        completionHandler()
+    }
+    
+    override func wake() {
+        // Add code here to wake up.
+    }
+}

ios/SingBoxPacketTunnel/SingBoxPacketTunnel.entitlements

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.$(BASE_BUNDLE_IDENTIFIER)</string>
+	</array>
+</dict>
+</plist>