fix bug about volume and live

Flutter/ios/Classes/FTXAudioManager.h

@@ -12,10 +12,8 @@
 
 - (void)setVolumeUIVisible:(BOOL)volumeUIVisible;
 
-- (void)registerVolumeChangeListener:(_Nonnull id)observer selector:(_Nonnull SEL)aSelector
-                                name:(nullable NSNotificationName)aName object:(nullable id)anObject;
+- (void)registerVolumeChangeListener:(_Nonnull id)observer;
 
-- (void)destory:(_Nonnull id)observer name:(nullable NSNotificationName)aName
-                                object:(nullable id)anObject;
+- (void)destory:(_Nonnull id)observer;
 
 @end

Flutter/ios/Classes/FTXAudioManager.m

@@ -5,7 +5,10 @@
 @implementation FTXAudioManager
     UISlider *_volumeSlider;
     MPVolumeView *volumeView;
+    AVAudioSession *audioSession;
 
+NSString *const LOW_VERSION_NOTIFCATION_NAME = @"AVSystemController_SystemVolumeDidChangeNotification";
+NSString *const NOTIFCATION_NAME = @"SystemVolumeDidChange";
 
 - (instancetype)init
  {
@@ -24,6 +27,9 @@
                  break;
              }
          }
+
+         audioSession = [AVAudioSession sharedInstance];
+         [audioSession setActive:true error:nil];
      }
      return self;
  };
@@ -48,17 +54,18 @@
     volumeView.hidden = !volumeUIVisible;
 }
 
-- (void)registerVolumeChangeListener:(id)observer selector:(SEL)aSelector name:(NSNotificationName)aName object:(id)anObject
+- (void)registerVolumeChangeListener:(id)observer
 {
-    [[NSNotificationCenter defaultCenter] addObserver:observer selector:aSelector name:aName object:anObject];
+    // destory volume observer
+    [audioSession addObserver:observer forKeyPath:@"outputVolume" options: NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOld  context:nil];
 }
 
-- (void)destory:(id)observer name:(NSNotificationName)aName object:(id)anObject
+- (void)destory:(id)observer
 {
     // destory volume view
     [volumeView removeFromSuperview];
     // destory volume observer
-    [[NSNotificationCenter defaultCenter] removeObserver:observer name:aName object:anObject];
+    [audioSession removeObserver:observer forKeyPath:@"outputVolume" context:nil];
 }
 
 @end

Flutter/ios/Classes/FTXTransformation.m

@@ -62,7 +62,11 @@
     playConfig.enableAEC = [args[@"config"][@"enableAec"] boolValue];
     playConfig.enableMessage = [args[@"config"][@"enableMessage"] intValue];
     playConfig.enableMetaData = [args[@"config"][@"enableMetaData"] intValue];
-    playConfig.flvSessionKey = [args[@"config"][@"flvSessionKey"] stringValue];
+    NSString *flvSessionKey = args[@"config"][@"flvSessionKey"];
+
+    if(flvSessionKey != nil && flvSessionKey.length > 0) {
+        playConfig.flvSessionKey = flvSessionKey;
+    }
 
     return playConfig;
 }

Flutter/ios/Classes/SuperPlayerPlugin.m

@@ -67,7 +67,7 @@ SuperPlayerPlugin* instance;
     [_eventChannel setStreamHandler:self];
     [_pipEventChannel setStreamHandler:self];
 
-    [audioManager registerVolumeChangeListener:self selector:@selector(systemVolumeDidChangeNoti:) name:@"AVSystemController_SystemVolumeDidChangeNotification"  object:nil];
+    [audioManager registerVolumeChangeListener:self];
      _FTXDownloadManager = [[FTXDownloadManager alloc] initWithRegistrar:registrar];
     // orientation
     mCurrentOrientation = ORIENTATION_PORTRAIT_UP;
@@ -79,7 +79,8 @@ SuperPlayerPlugin* instance;
     return self;
 }
 
--(void)systemVolumeDidChangeNoti:(NSNotification* )noti{
+- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context
+{
     [_eventSink success:[SuperPlayerPlugin getParamsWithEvent:EVENT_VOLUME_CHANGED withParams:@{}]];
 }
 
@@ -207,7 +208,7 @@ SuperPlayerPlugin* instance;
 
 -(void) destory
 {
-    [audioManager destory:self name:@"AVSystemController_SystemVolumeDidChangeNotification" object:nil];
+    [audioManager destory:self];
 }
 
 #pragma mark - FlutterStreamHandler