Fixed Swift runtime failure/crash during unexpected capture() call

'Unexpectedly found nil while implicitly unwrapping an Optional value'

Author: scarlac

example/ios/Podfile.lock

@@ -575,7 +575,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   boost: 57d2868c099736d80fcd648bf211b4431e51a558
   CocoaAsyncSocket: 065fd1e645c7abab64f7a6a2007a48038fdc6a99
-  DoubleConversion: 5189b271737e1565bdce30deb4a08d647e3f5f54
+  DoubleConversion: cde416483dac037923206447da6e1454df403714
   FBLazyVector: f637f31eacba90d4fdeff3fa41608b8f361c173b
   FBReactNativeSpec: 0d9a4f4de7ab614c49e98c00aedfd3bfbda33d59
   Flipper: 26fc4b7382499f1281eb8cb921e5c3ad6de91fe0
@@ -588,7 +588,7 @@ SPEC CHECKSUMS:
   Flipper-RSocket: d9d9ade67cbecf6ac10730304bf5607266dd2541
   FlipperKit: cbdee19bdd4e7f05472a66ce290f1b729ba3cb86
   fmt: ff9d55029c625d3757ed641535fd4a75fedc7ce9
-  glog: 04b94705f318337d7ead9e6d17c019bd9b1f6b1b
+  glog: 40a13f7840415b9a77023fbcae0f1e6f43192af3
   hermes-engine: 47986d26692ae75ee7a17ab049caee8864f855de
   libevent: 4049cae6c81cdb3654a443be001fb9bdceff7913
   OpenSSL-Universal: ebc357f1e6bc71fa463ccb2fe676756aff50e88c
@@ -619,7 +619,7 @@ SPEC CHECKSUMS:
   React-RCTVibration: 43ffd976a25f6057a7cf95ea3648ba4e00287f89
   React-runtimeexecutor: 7c51ae9d4b3e9608a2366e39ccaa606aa551b9ed
   ReactCommon: 85c98ab0a509e70bf5ee5d9715cf68dbf495b84c
-  ReactNativeCameraKit: d95d3e19c514526a234d9f93c6db7e7f10eef9ea
+  ReactNativeCameraKit: 7c273034b2674cf5ccbaab2e25d9ff15b3e7d698
   SocketRocket: fccef3f9c5cedea1353a9ef6ada904fde10d6608
   Yoga: 065f0b74dba4832d6e328238de46eb72c5de9556
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a

ios/ReactNativeCameraKit/CameraManager.swift

@@ -10,22 +10,25 @@ import Foundation
  * Class managing the communication between React Native and the native implementation
  */
 @objc(CKCameraManager) public class CameraManager: RCTViewManager {
-    var camera: CameraView!
+    var camera: CameraView?
 
     override public static func requiresMainQueueSetup() -> Bool {
         return true
     }
 
     override public func view() -> UIView! {
         camera = CameraView()
-
         return camera
     }
 
     @objc func capture(_ options: NSDictionary,
                        resolve: @escaping RCTPromiseResolveBlock,
                        reject: @escaping RCTPromiseRejectBlock) {
-        camera.capture(options as! [String: Any],
+        guard let cam = self.camera else {
+            reject("capture_error", "CKCamera capture() was called but  camera view is nil", nil)
+            return
+        }
+        cam.capture(options as! [String: Any],
                        onSuccess: { resolve($0) },
                        onError: { reject("capture_error", $0, nil) })
     }