fix memory leaks

Package.swift

@@ -1,16 +1,18 @@
-// swift-tools-version:5.0
+// swift-tools-version:5.9
 import PackageDescription
 
 let package = Package(
-  name: "QRCodeReader",
-  products: [
-    .library(name: "QRCodeReader", targets: ["QRCodeReader"]),
-  ],
-  targets: [
-    .target(
-      name: "QRCodeReader",
-      dependencies: [],
-      path: "Sources"),
-  ]
+    name: "QRCodeReader",
+    platforms: [
+        .iOS(.v16)
+    ],
+    products: [
+        .library(name: "QRCodeReader", targets: ["QRCodeReader"])
+    ],
+    targets: [
+        .target(
+            name: "QRCodeReader",
+            dependencies: [],
+        )
+    ]
 )
-

QRCodeReader.swift.podspec

@@ -13,6 +13,6 @@ Pod::Spec.new do |s|
   s.ios.deployment_target = '8.0'
 
   s.framework    = 'AVFoundation'
-  s.source_files = 'Sources/*.swift'
+  s.source_files = 'Sources/QRCodeReader/*.swift'
   s.requires_arc = true
 end

Sources/QRCodeReader.swift → Sources/QRCodeReader/QRCodeReader.swift

@@ -130,7 +130,8 @@ public final class QRCodeReader: NSObject, AVCaptureMetadataOutputObjectsDelegat
 
     super.init()
 
-    sessionQueue.async {
+    sessionQueue.async { [weak self] in
+      guard let self = self else { return }
       self.configureDefaultComponents(withCaptureDevicePosition: captureDevicePosition)
     }
   }
@@ -199,7 +200,8 @@ public final class QRCodeReader: NSObject, AVCaptureMetadataOutputObjectsDelegat
    *Notes: if `stopScanningWhenCodeIsFound` is sets to true (default behaviour), each time the scanner found a code it calls the `stopScanning` method.*
    */
   public func startScanning() {
-    sessionQueue.async {
+    sessionQueue.async { [weak self] in
+      guard let self = self else { return }
       guard !self.session.isRunning else { return }
 
       self.session.startRunning()
@@ -212,7 +214,8 @@ public final class QRCodeReader: NSObject, AVCaptureMetadataOutputObjectsDelegat
 
   /// Stops scanning the codes.
   public func stopScanning() {
-    sessionQueue.async {
+    sessionQueue.async { [weak self] in
+      guard let self = self else { return }
       guard self.session.isRunning else { return }
 
       self.session.stopRunning()

Sources/QRCodeReaderViewController.swift → Sources/QRCodeReader/QRCodeReaderViewController.swift

@@ -64,18 +64,18 @@ public class QRCodeReaderViewController: UIViewController {
 
     view.backgroundColor = .black
 
-    codeReader.didFindCode = { [weak self] resultAsObject in
+    codeReader.didFindCode = { [weak self, weak builder] resultAsObject in
       if let weakSelf = self {
-        if let qrv = builder.readerView.displayable as? QRCodeReaderView {
+        if let qrv = builder?.readerView.displayable as? QRCodeReaderView {
           qrv.addGreenBorder()
         }
         weakSelf.completionBlock?(resultAsObject)
         weakSelf.delegate?.reader(weakSelf, didScanResult: resultAsObject)
       }
     }
 
-    codeReader.didFailDecoding = {
-      if let qrv = builder.readerView.displayable as? QRCodeReaderView {
+    codeReader.didFailDecoding = { [weak builder] in
+      if let qrv = builder?.readerView.displayable as? QRCodeReaderView {
         qrv.addRedBorder()
       }
     }