Add Property control need update progressTime

Sources/SCScrollableWaveformView.h

@@ -18,4 +18,7 @@
  */
 @property (readonly, nonatomic) SCWaveformView *waveformView;
 
+// Default is NO
+@property (assign, nonatomic) BOOL shouldUpdateProgressTime;
+
 @end

Sources/SCScrollableWaveformView.m

@@ -69,6 +69,10 @@ - (void)_updateWaveform {
 //            NSLog(@"Updating timeRange to %fs", CMTimeGetSeconds(newStart));
 
             _waveformView.timeRange = CMTimeRangeMake(newStart, _waveformView.timeRange.duration);
+
+            if (self.shouldUpdateProgressTime) {
+                self.waveformView.progressTime = newStart;
+            }
         }
     }
 }

Sources/SCViewController.m

@@ -9,19 +9,30 @@
 #import "SCViewController.h"
 #import "SCWaveformView.h"
 
-@interface SCViewController () {
+static Float64 const defaultMaxAudioTime = 20.0;
+
+@interface SCViewController () <UIScrollViewDelegate> {
     AVPlayer *_player;
     id _observer;
 }
 
+@property (nonatomic, assign) Float64 maxAudioTime;
+
 @end
 
 @implementation SCViewController
 
-- (void)viewDidLoad
-{
+- (void)awakeFromNib {
+    self.maxAudioTime = defaultMaxAudioTime;
+}
+
+- (void)viewDidLoad {
     [super viewDidLoad];
 
+    // should need update for scrolling
+    self.scrollableWaveformView.shouldUpdateProgressTime = YES;
+
+    self.scrollableWaveformView.delegate = self;
     self.scrollableWaveformView.waveformView.precision = 1;
     self.scrollableWaveformView.waveformView.lineWidthRatio = 1;
     self.scrollableWaveformView.waveformView.normalColor = [UIColor colorWithRed:0.8 green:0.3 blue:0.3 alpha:1];
@@ -36,14 +47,27 @@ - (void)viewDidLoad
                                                 self.slider.value * CMTimeGetSeconds(self.scrollableWaveformView.waveformView.asset.duration),
                                                 100000);
 
-    self.scrollableWaveformView.waveformView.timeRange = CMTimeRangeMake(CMTimeMakeWithSeconds(15, 10000), progressTime);
+    self.scrollableWaveformView.waveformView.timeRange = CMTimeRangeMake(CMTimeMakeWithSeconds(self.maxAudioTime, 10000), progressTime);
 
     _player = [AVPlayer playerWithPlayerItem:[AVPlayerItem playerItemWithAsset:asset]];
 
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_playReachedEnd:) name:AVPlayerItemDidPlayToEndTimeNotification object:_player.currentItem];
 
     __unsafe_unretained SCViewController *mySelf = self;
+    __unsafe_unretained AVPlayer *myPlayer = _player;
     _observer = [_player addPeriodicTimeObserverForInterval:CMTimeMake(1, 60) queue:dispatch_get_main_queue() usingBlock:^(CMTime time) {
+
+        time = CMTimeMake(time.value + mySelf.scrollableWaveformView.waveformView.timeRange.start.value, (time.timescale + mySelf.scrollableWaveformView.waveformView.timeRange.start.timescale));
+
+        Float64 currentTime = CMTimeGetSeconds(myPlayer.currentTime);
+
+        Float64 maxTime = CMTimeGetSeconds(mySelf.scrollableWaveformView.waveformView.timeRange.start) + self.maxAudioTime;
+
+        if (currentTime >= maxTime) {
+            time = mySelf.scrollableWaveformView.waveformView.timeRange.start;
+            [myPlayer seekToTime:time];
+        }
+
         mySelf.scrollableWaveformView.waveformView.progressTime = time;
     }];
 }
@@ -106,4 +130,33 @@ - (IBAction)sliderProgressChanged:(UISlider*)sender
     self.scrollableWaveformView.waveformView.timeRange = CMTimeRangeMake(start, duration);
 }
 
+#pragma mark - UIScrollView Delegate
+
+- (void)didScroll {
+    [_player pause];
+}
+
+- (void)didEndScroll {
+
+    CMTime time = self.scrollableWaveformView.waveformView.timeRange.start;
+    [_player seekToTime:time];
+    self.scrollableWaveformView.waveformView.progressTime = time;
+
+    [_player play];
+}
+
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
+    [self didScroll];
+}
+
+- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
+    [self didEndScroll];
+}
+
+- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
+    if (!decelerate) {
+        [self didEndScroll];
+    }
+}
+
 @end