diff --git a/SGPlayer/Classes/Core/SGRenderer/SGClock+Internal.h b/SGPlayer/Classes/Core/SGRenderer/SGClock+Internal.h
index 2d6a5cd8..0d287114 100644
--- a/SGPlayer/Classes/Core/SGRenderer/SGClock+Internal.h
+++ b/SGPlayer/Classes/Core/SGRenderer/SGClock+Internal.h
@@ -70,6 +70,6 @@
 /**
  *
  */
-- (void)clock:(SGClock *)clock didChcnageCurrentTime:(CMTime)currentTime;
+- (void)clock:(SGClock *)clock didChangeCurrentTime:(CMTime)currentTime;
 
 @end
diff --git a/SGPlayer/Classes/Core/SGRenderer/SGClock.m b/SGPlayer/Classes/Core/SGRenderer/SGClock.m
index ade7ef56..6bf2cf58 100644
--- a/SGPlayer/Classes/Core/SGRenderer/SGClock.m
+++ b/SGPlayer/Classes/Core/SGRenderer/SGClock.m
@@ -83,7 +83,7 @@ - (void)setAudioTime:(CMTime)time running:(BOOL)running
                 CMTimebaseSetTime(self->_audioTimebase, time);
                 CMTimebaseSetTime(self->_videoTimebase, time);
             }
-            [self.delegate clock:self didChcnageCurrentTime:time];
+            [self.delegate clock:self didChangeCurrentTime:time];
         } else if (self->_audioRunning != running) {
             self->_audioRunning = running;
             CMTimebaseSetRate(self->_audioTimebase, running ? 1.0 : 0.0);
@@ -101,7 +101,7 @@ - (void)setVideoTime:(CMTime)time
             CMTimebaseSetTime(self->_videoTimebase, time);
             CMTimebaseSetRate(self->_videoTimebase, 1.0);
         }
-        [self.delegate clock:self didChcnageCurrentTime:time];
+        [self.delegate clock:self didChangeCurrentTime:time];
     });
 }
 
diff --git a/SGPlayer/Classes/SGPlayer.m b/SGPlayer/Classes/SGPlayer.m
index 763e077a..4130e19d 100644
--- a/SGPlayer/Classes/SGPlayer.m
+++ b/SGPlayer/Classes/SGPlayer.m
@@ -469,7 +469,7 @@ - (BOOL)seekToTime:(CMTime)time toleranceBefor:(CMTime)toleranceBefor toleranceA
 
 #pragma mark - SGClockDelegate
 
-- (void)clock:(SGClock *)clock didChcnageCurrentTime:(CMTime)currentTime
+- (void)clock:(SGClock *)clock didChangeCurrentTime:(CMTime)currentTime
 {
     SGLockEXE10(self->_lock, ^SGBlock {
         SGInfoAction action = SGInfoActionNone;