From 779d531efa76545c079292243f31d8ed54474057 Mon Sep 17 00:00:00 2001
From: Jack-sh1 <shennalin2@gmail.com>
Date: Tue, 19 May 2026 01:55:08 +0800
Subject: [PATCH] Fix @MainActor warnings for startRunning/stopRunning

Add strict-concurrency compiler flag and mark ScannerViewController
as @MainActor. Remove DispatchQueue.global dispatches around
AVCaptureSession.startRunning() and stopRunning() which are @MainActor
isolated in modern Swift, eliminating concurrency warnings reported in
issue #105.

Fixes #105
---
 Package.swift                                   | 13 ++++++++++---
 Sources/CodeScanner/ScannerViewController.swift |  9 +++------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/Package.swift b/Package.swift
index 42076e9..32c74c8 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.9
+// swift-tools-version: 5.9
 import PackageDescription
 
 let package = Package(
@@ -6,5 +6,12 @@ let package = Package(
     platforms: [.iOS(.v13), .macOS(.v10_15), .tvOS(.v13), .visionOS(.v1), .watchOS(.v6)],
     products: [.library(name: "CodeScanner", targets: ["CodeScanner"])],
     dependencies: [],
-    targets: [.target(name: "CodeScanner", dependencies: [])]
-)
+    targets: [
+        .target(
+            name: "CodeScanner",
+            swiftSettings: [
+                .unsafeFlags(["-strict-concurrency=targeted"])
+            ]
+        )
+    ]
+)
\ No newline at end of file
diff --git a/Sources/CodeScanner/ScannerViewController.swift b/Sources/CodeScanner/ScannerViewController.swift
index 292194a..ef05d58 100644
--- a/Sources/CodeScanner/ScannerViewController.swift
+++ b/Sources/CodeScanner/ScannerViewController.swift
@@ -13,6 +13,7 @@ import UIKit
 @available(macCatalyst 14.0, *)
 extension CodeScannerView {
     
+    @MainActor
     public final class ScannerViewController: UIViewController, UINavigationControllerDelegate {
         private let photoOutput = AVCapturePhotoOutput()
         private var isCapturing = false
@@ -191,9 +192,7 @@ extension CodeScannerView {
             reset()
 
             if !captureSession.isRunning {
-                DispatchQueue.global(qos: .userInteractive).async {
-                    self.captureSession?.startRunning()
-                }
+                captureSession?.startRunning()
             }
         }
 
@@ -294,9 +293,7 @@ extension CodeScannerView {
             super.viewDidDisappear(animated)
 
             if captureSession?.isRunning == true {
-                DispatchQueue.global(qos: .userInteractive).async {
-                    self.captureSession?.stopRunning()
-                }
+                captureSession?.stopRunning()
             }
 
             NotificationCenter.default.removeObserver(self)