Activate sound when the volume is changed (even in silent mode) (#95)

* Activate sound when the volume is changed even if the phone is on silent mode (kind of like Snapchat). This is reset when video is closed, so volume must be changed again when new video starts if the user wants sound

* Remove UIRequiredDeviceCapabilities

Author: askeland

Source/VideoView.swift

@@ -14,6 +14,7 @@ protocol VideoViewDelegate: class {
 
 class VideoView: UIView {
     static let playerItemStatusKeyPath = "status"
+    static let audioSessionVolumeKeyPath = "outputVolume"
     weak var delegate: VideoViewDelegate?
     var playerCurrentItemStatus = AVPlayerItemStatus.unknown
 
@@ -42,6 +43,7 @@ class VideoView: UIView {
 
     fileprivate var shouldRegisterForStatusNotifications = true
     fileprivate var shouldRegisterForFailureOrEndingNotifications = true
+    fileprivate var shouldRegisterForOutputVolume = true
 
     fileprivate var slowMotionTimeObserver: Any?
     fileprivate var playbackProgressTimeObserver: Any?
@@ -81,6 +83,17 @@ class VideoView: UIView {
     }
 
     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
+        
+        if keyPath == VideoView.audioSessionVolumeKeyPath {
+            do {
+                try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: [])
+            }
+            catch let error {
+                print("Failed to start playback sound: \(error.localizedDescription)")
+            }
+            return
+        }
+        
         guard let playerItem = object as? AVPlayerItem else { return }
         self.playerCurrentItemStatus = playerItem.status
 
@@ -138,6 +151,15 @@ class VideoView: UIView {
 
                 self.shouldRegisterForStatusNotifications = false
                 currentItem.addObserver(self, forKeyPath: VideoView.playerItemStatusKeyPath, options: [], context: nil)
+                
+                do {
+                    let audioSession = AVAudioSession.sharedInstance()
+                    try audioSession.setActive(true)
+                    audioSession.addObserver(self, forKeyPath: VideoView.audioSessionVolumeKeyPath, options: .new, context: nil)
+                    self.shouldRegisterForOutputVolume = false
+                } catch {
+                    print("Failed to activate audio session")
+                }
             }
 
             if self.shouldRegisterForFailureOrEndingNotifications {
@@ -163,6 +185,8 @@ class VideoView: UIView {
         self.playerLayer.player?.pause()
         self.playerLayer.player?.seek(to: kCMTimeZero)
         self.playerLayer.player = nil
+        
+        try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategorySoloAmbient, with: [])
     }
 
     func play() {
@@ -335,6 +359,11 @@ extension VideoView {
             NotificationCenter.default.removeObserver(self, name: .AVPlayerItemPlaybackStalled, object: nil)
             NotificationCenter.default.removeObserver(self, name: .AVPlayerItemDidPlayToEndTime, object: nil)
         }
+        
+        if self.shouldRegisterForOutputVolume == false {
+            self.shouldRegisterForOutputVolume = true
+            AVAudioSession.sharedInstance().removeObserver(self, forKeyPath: VideoView.audioSessionVolumeKeyPath)
+        }
     }
 
     // When the video is having troubles buffering it might trigger the "AVPlayerItemPlaybackStalled" notification

iOS/Info.plist

@@ -28,10 +28,6 @@
 	<true/>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
-	<key>UIRequiredDeviceCapabilities</key>
-	<array>
-		<string>armv7</string>
-	</array>
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>