feat: Add enableShutterSound prop to takePhoto() 🔊 (#1702)

* feat: Add `enableShutterSound` prop to `takePhoto()` 🔊

* Swift lint

ios/CameraView+TakePhoto.swift

@@ -45,6 +45,9 @@ extension CameraView {
         photoSettings.flashMode = flashMode
       }
 
+      // shutter sound
+      let enableShutterSound = options["enableShutterSound"] as? Bool ?? true
+
       // depth data
       photoSettings.isDepthDataDeliveryEnabled = photoOutput.isDepthDataDeliveryEnabled
       if #available(iOS 12.0, *) {
@@ -75,7 +78,7 @@ extension CameraView {
         photoSettings.isAutoContentAwareDistortionCorrectionEnabled = enableAutoDistortionCorrection
       }
 
-      photoOutput.capturePhoto(with: photoSettings, delegate: PhotoCaptureDelegate(promise: promise))
+      photoOutput.capturePhoto(with: photoSettings, delegate: PhotoCaptureDelegate(promise: promise, enableShutterSound: enableShutterSound))
 
       // Assume that `takePhoto` is always called with the same parameters, so prepare the next call too.
       photoOutput.setPreparedPhotoSettingsArray([photoSettings], completionHandler: nil)

ios/PhotoCaptureDelegate.swift

@@ -14,13 +14,22 @@ private var delegatesReferences: [NSObject] = []
 
 class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
   private let promise: Promise
+  private let enableShutterSound: Bool
 
-  required init(promise: Promise) {
+  required init(promise: Promise, enableShutterSound: Bool) {
     self.promise = promise
+    self.enableShutterSound = enableShutterSound
     super.init()
     delegatesReferences.append(self)
   }
 
+  func photoOutput(_: AVCapturePhotoOutput, willCapturePhotoFor _: AVCaptureResolvedPhotoSettings) {
+    if !enableShutterSound {
+      // disable system shutter sound (see https://stackoverflow.com/a/55235949/5281431)
+      AudioServicesDisposeSystemSoundID(1108)
+    }
+  }
+
   func photoOutput(_: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
     defer {
       delegatesReferences.removeAll(where: { $0 == self })