获取视频的当前时间(播放器-Swift) [英] Getting Current Time of a Video (Player - Swift)
问题描述
我使用播放器(使用AVFoundation)设置了视频播放器.我正在尝试访问和操作视频的currentTime，但是该库仅提供视频的时长，而不提供currentTime.
I set up a video player using Player (using AVFoundation). I am trying to access and manipulate currentTime of the video however, the library is only providing duration of the video but not currentTime.
我正在调整播放器的演示项目.
请检查下面的已更新"部分，而不是此处:
一个朋友告诉我，我可以使用这种方法来实现，但是在这种情况下，我真的不知道如何适应这种方法.
A friend told me I can achieve using that approach, but I couldn't really get how to adapt this approach in this case.
[NSTimer scheduledTimerWithInterval:1.0 target:self selector:@selector(refreshCurrentTimeTextField) userInfo:nil repeats:YES]
-(void)refreshCurrentTimeTextField {
NSTimeInterval currentTime;
QTMovie *movie = [movieView movie];
QTGetTimeInterval([movie currentTime], ¤tTime);
int hours = currentTime/3600;
int minutes = (currentTime/60) % 60;
int seconds = currentTime % 60;
NSString *timeLabel;
if(hours > 0) {
timeLabel = [NSString stringWithFormat:@"%02i:%02i:%02i", hours, minutes, seconds];
} else {
timeLabel = [NSString stringWithFormat:@"%02i:%02i", minutes, seconds];
}
[yourTextField setStringValue:timeLabel];
}
如果你们中有人使用或迷失了这个库，有什么方法可以获取currentTime吗?是否有其他方法可以访问/操纵视频的currentTime?
If any of you guys used or stumbled on this library, is there any way of getting currentTime? Is there any alternative way of accessing/manipulating currentTime of the video?
更新:
显然有人给了导入&的代码.在相同的库此处的PBJVideoPlayer 中连接UISlider for Objective-C.但是我无法在Swift for Player中采用相同的方法.
Someone apparently gave the code for the importing & connecting UISlider for Objective-C for equivalent library PBJVideoPlayer in here. But I couldn't adapt the same approach on Swift for Player.
链接摘录:
diff --git a/Pods/PBJVideoPlayer/Source/PBJVideoPlayerController.m b/Pods/PBJVideoPlayer/Source/PBJVideoPlayerController.m
index be6a7d1..51a420e 100644
--- a/Pods/PBJVideoPlayer/Source/PBJVideoPlayerController.m
+++ b/Pods/PBJVideoPlayer/Source/PBJVideoPlayerController.m
@@ -81,6 +81,8 @@ static NSString * const PBJVideoPlayerControllerReadyForDisplay = @"readyForDisp
float _volume;
}
+@property (nonatomic, strong) UISlider *slider;
+
@end
@implementation PBJVideoPlayerController
@@ -93,6 +95,16 @@ static NSString * const PBJVideoPlayerControllerReadyForDisplay = @"readyForDisp
#pragma mark - getters/setters
+- (UISlider *)slider {
+ if (_slider == nil) {
+ _slider = [[UISlider alloc] initWithFrame:CGRectZero];
+ _slider.minimumValue = 0.0;
+ _slider.maximumValue = 0.0;
+ _slider.continuous = YES;
+ }
+ return _slider;
+}
+
- (void)setVideoFillMode:(NSString *)videoFillMode
{
if (_videoFillMode != videoFillMode) {
@@ -311,6 +323,59 @@ static NSString * const PBJVideoPlayerControllerReadyForDisplay = @"readyForDisp
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(_applicationWillResignActive:) name:UIApplicationWillResignActiveNotification object:nil];
[nc addObserver:self selector:@selector(_applicationDidEnterBackground:) name:UIApplicationDidEnterBackgroundNotification object:nil];
+
+ self.slider.hidden = YES;
+ [self.slider addTarget:self action:@selector(moveScrubber:) forControlEvents:UIControlEventValueChanged];
+ [self.view addSubview:self.slider];
+
+ __weak typeof(self) weak = self;
+ CMTime intervalSeconds = CMTimeMakeWithSeconds(0.25f, NSEC_PER_SEC);
+ [_player addPeriodicTimeObserverForInterval:intervalSeconds
+ queue:dispatch_get_main_queue()
+ usingBlock:^(CMTime time) {
+ [weak syncScrubber];
+ }];
+}
+
+- (void)syncScrubber
+{
+ CMTime duration = _player.currentItem.duration;
+ if (CMTIME_IS_INVALID(duration)) {
+ self.slider.maximumValue = 0.0;
+ } else {
+ Float64 seconds = CMTimeGetSeconds(duration);
+ if (isfinite(seconds)) {
+ self.slider.maximumValue = seconds;
+ Float64 current = CMTimeGetSeconds([_player currentTime]);
+ self.slider.value = current;
+ }
+ }
+}
+
+- (void)moveScrubber:(UISlider *)slider
+{
+ CMTime duration = _player.currentItem.duration;
+ if (CMTIME_IS_INVALID(duration)) {
+ self.slider.maximumValue = 0.0;
+ } else {
+ Float64 seconds = CMTimeGetSeconds(duration);
+ if (isfinite(seconds)) {
+ self.slider.maximumValue = seconds;
+ [_player seekToTime:CMTimeMakeWithSeconds(slider.value, NSEC_PER_SEC)];
+ }
+ }
+}
+
+- (void)viewDidAppear:(BOOL)animated
+{
+ [super viewDidAppear:animated];
+
+ CGRect sliderRect = self.view.frame;
+ sliderRect.origin.y = sliderRect.size.height - 40;
+ sliderRect.size.height = 40;
+ sliderRect.origin.x = self.view.frame.size.width/4.0;
+ sliderRect.size.width = self.view.frame.size.width/2.0;
+ self.slider.frame = sliderRect;
}
- (void)viewDidDisappear:(BOOL)animated
@@ -402,11 +467,13 @@ typedef void (^PBJVideoPlayerBlock)();
case PBJVideoPlayerPlaybackStateStopped:
{
[self playFromBeginning];
+ self.slider.hidden = YES;
break;
}
case PBJVideoPlayerPlaybackStatePaused:
{
[self playFromCurrentTime];
+ self.slider.hidden = YES;
break;
}
case PBJVideoPlayerPlaybackStatePlaying:
@@ -414,6 +481,7 @@ typedef void (^PBJVideoPlayerBlock)();
default:
{
[self pause];
+ self.slider.hidden = NO;
break;
}
}
@@ -511,6 +579,14 @@ typedef void (^PBJVideoPlayerBlock)();
_videoView.playerLayer.backgroundColor = [[UIColor blackColor] CGColor];
[_videoView.playerLayer setPlayer:_player];
_videoView.playerLayer.hidden = NO;
+
+ CMTime duration = _playerItem.duration;
+ if (CMTIME_IS_INVALID(duration)) {
+ self.slider.maximumValue = 0.0;
+ } else {
+ Float64 seconds = CMTimeGetSeconds(duration);
+ self.slider.maximumValue = seconds;
+ }
break;
}
case AVPlayerStatusFailed:
推荐答案
我只是运行了GitHub项目，并通过以下代码对其进行了修复:
I just run you GitHub project and i fixed it by following code:
在您的 Player.swift 课程中.
player.addPeriodicTimeObserverForInterval(CMTimeMake(1, 100), queue: dispatch_get_main_queue()) {
[unowned self] time in
let timeString = String(format: "%02.2f", CMTimeGetSeconds(time))
print("time is \(timeString)")
self.delegate?.playerPlaybackstimer(timeString)
}
在public convenience init() {函数中添加了Above方法，其外观如下:
That Above method added in public convenience init() { funtion so that will be look like:
public convenience init() {
self.init(nibName: nil, bundle: nil)
self.player = AVPlayer()
self.player.actionAtItemEnd = .Pause
self.player.addObserver(self, forKeyPath: PlayerRateKey, options: ([NSKeyValueObservingOptions.New, NSKeyValueObservingOptions.Old]) , context: &PlayerObserverContext)
self.playbackLoops = false
self.playbackFreezesAtEnd = false
self.playbackState = .Stopped
self.bufferingState = .Unknown
player.addPeriodicTimeObserverForInterval(CMTimeMake(1, 100), queue: dispatch_get_main_queue()) {
[unowned self] time in
let timeString = String(format: "%02.2f", CMTimeGetSeconds(time))
print("time is \(timeString)")
self.delegate?.playerPlaybackstimer(timeString)
}
}
之后，我在public protocol PlayerDelegate: class中创建一个Delegate方法，如下所示:
After that i make a Delegate method in public protocol PlayerDelegate: classthat will be look like:
public protocol PlayerDelegate: class {
func playerReady(player: Player)
func playerPlaybackStateDidChange(player: Player)
func playerBufferingStateDidChange(player: Player)
func playerPlaybackWillStartFromBeginning(player: Player)
func playerPlaybackDidEnd(player: Player)
func playerPlaybackstimer(NSString: String)
}
现在进入您的ViewController.swift类并添加以下功能:
Now go in your ViewController.swift class and add the following function:
func playerPlaybackstimer(NSString: String) {
print("currunt time \(NSString)")
}
现在运行您的项目并享受.
Now run your project and enjoy.
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