Release 3.3.8

- 修复 在tableviewcell中播放时不响应tableview的上下滚动
- 修复 调用player stop后，进度条没有重置为0

SJBaseVideoPlayer.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = 'SJBaseVideoPlayer'
-  s.version      = '3.3.7'
+  s.version      = '3.3.8'
   s.summary      = 'video player.'
   s.description  = 'https://github.com/changsanjiang/SJBaseVideoPlayer/blob/master/README.md'
   s.homepage     = 'https://github.com/changsanjiang/SJBaseVideoPlayer'

SJBaseVideoPlayer/Common/Implements/SJMediaPlaybackController.m

@@ -32,6 +32,7 @@ - (void)cancel;
 @interface SJMediaPlayerTimeObserverItem : NSObject
 - (instancetype)initWithInterval:(NSTimeInterval)interval player:(__weak id<SJMediaPlayer>)player currentTimeDidChangeExeBlock:(nonnull void (^)(NSTimeInterval time))currentTimeDidChangeExeBlock playableDurationDidChangeExeBlock:(nonnull void (^)(NSTimeInterval time))playableDurationDidChangeExeBlock durationDidChangeExeBlock:(nonnull void (^)(NSTimeInterval time))durationDidChangeExeBlock;
 - (void)invalidate;
+- (void)stop;
 @end
 
 @implementation SJMediaPlayerTimeObserverItem {
@@ -96,6 +97,13 @@ - (void)resumeOrPause {
         [NSRunLoop.mainRunLoop addTimer:_timer forMode:NSRunLoopCommonModes];
     }
 }
+
+- (void)stop {
+    [self invalidate];
+    if ( _playableDurationDidChangeExeBlock ) _playableDurationDidChangeExeBlock(0);
+    if ( _currentTimeDidChangeExeBlock ) _currentTimeDidChangeExeBlock(0);
+    if ( _durationDidChangeExeBlock ) _durationDidChangeExeBlock(0);
+}
 
 - (void)_refresh {
     NSTimeInterval currentTime = _player.currentTime;
@@ -248,11 +256,12 @@ - (void)stop {
     [_definitionMediaPlayerLoader cancel];
     _definitionMediaPlayerLoader = nil;
     _definitionMedia = nil;
-    [self _removePeriodicTimeObserver];
     [self.currentPlayerView removeFromSuperview];
     _playerView.view = nil;
     self.currentPlayer = nil;
     _media = nil;
+    [_periodicTimeObserver stop];
+    [self _removePeriodicTimeObserver];
     if ( self.timeControlStatus != SJPlaybackTimeControlStatusPaused )
         self.timeControlStatus = SJPlaybackTimeControlStatusPaused;
 }
@@ -545,6 +554,7 @@ - (void)_addPeriodicTimeObserver {
 }
 
 - (void)_removePeriodicTimeObserver {
+    [_periodicTimeObserver invalidate];
     _periodicTimeObserver = nil;
 }