update ios project

update ios project

source/ios/Shared/Helpers/URL+Helpers.swift

@@ -0,0 +1,35 @@
+//
+//  URL+Helpers.swift
+//  PacketTunnel
+//
+//  Created by Jerry Bool on 2022/12/6.
+//
+
+import Foundation
+
+extension URL {
+    
+    var contents: String? {
+        guard self.isFileURL else {
+            return nil
+        }
+
+        do {
+            return try String(contentsOf: self)
+        }
+        catch {
+            Logger.log(error.localizedDescription, to: Logger.vpnLogFile)
+
+            return nil
+        }
+    }
+
+    @discardableResult
+    func truncate() -> Self {
+        if isFileURL {
+            try? "".write(to: self, atomically: true, encoding: .utf8)
+        }
+
+        return self
+    }
+}