MPMoviePlayerController - 检测按下 Next/Prev 按钮
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【中文标题】MPMoviePlayerController - 检测按下 Next/Prev 按钮【英文标题】:MPMoviePlayerController - detect pressing Next/Prev buttons 【发布时间】:2014-08-19 11:06:19 【问题描述】:我正在使用MPMoviePlayerController
,我需要检测按下 Next/Prev 按钮。我尝试了几件事,但似乎都不起作用。
这是我尝试过的:
远程控制事件-(void) viewWillAppear:(BOOL)animated
[super viewWillAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
-(void) viewWillDisappear:(BOOL)animated
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
[super viewWillDisappear:animated];
-(BOOL)canBecomeFirstResponder
return YES;
-(void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent
// stuff
问题是remoteControlReceivedWithEvent
方法永远不会被调用。我已经读到这在高于 6 的 ios 版本中不起作用 - 我正在使用 iOS 7
我尝试使用 MPMoviePlayerPlaybackStateDidChangeNotification
并检查 MPMoviePlaybackStateSeekingForward
或 MPMoviePlaybackStateSeekingBackward
- 不幸的是,这些播放状态是在拖动播放栏时设置的,而不是在按下 Next/Prev 按钮时设置的。
有什么想法吗?
【问题讨论】:
***.com/questions/3593683/… 正如您在我的帖子中看到的那样,这是我尝试的第一件事,但它不起作用 会不会是MPMoviePlayerController显示的时候调用了viewWillDisappear所以接收遥控结束了?请尝试将 viewWillDisappear 注释掉,然后重试。 @John 感谢您的建议,我也有同样的想法,没有这样的运气! :( 你看过 MPMoviePlayerNowPlayingMovieDidChangeNotification 了吗?它会告诉您当前播放的电影何时发生变化,如果您有包含电影的字典或数组,您可以确定正在播放的电影是下一个还是上一个。 developer.apple.com/library/ios/documentation/MediaPlayer/… 【参考方案1】:对不起,我不太了解您的问题,但是如果您想在控制中心使用您的应用程序中的控件,您可以使用:
// You need cath the singleton
MPRemoteCommandCenter *myRemote = [MPRemoteCommandCenter sharedCommandCenter];
//And add the selector you can fire depends on the button, a couple of examples:
[myRemote.playCommand addTarget:self action:@selector(myPlayMethods)];
[myRemote.nextTrackCommand addTarget:self action:@selector(myNextTrackMethods)];
【讨论】:
【参考方案2】:尝试注册以下活动:
- (void)viewDidAppear:(BOOL)animated
[super viewDidAppear:animated];
// Turn on remote control event delivery
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
// Set itself as the first responder
[self becomeFirstResponder];
也不要设置kAudioSessionProperty_OverrideCategoryMixWithOthers
属性
【讨论】:
也有解决方案说子类 Uiapplication 和 impelment -(void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent 你试过了吗?【参考方案3】:您是否尝试过 MPMoviePlayerNowPlayingMovieDidChangeNotification? 如果这不起作用,那么我建议转移到较低级别的 API,即 AVPlayer。它在视频播放和其他情况下提供对所有操作的细粒度控制。
【讨论】:
【参考方案4】:您需要注册才能处理moviePlayerLoadStateChanged 的通知。当您按下下一个/上一个按钮时,moviePlayerLoadStateChanged 将被调用,并且 loadState 将为 MPMovieLoadStateUnknown
-(void)registerMyStuff
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(moviePlayerLoadStateChanged:)
name:MPMoviePlayerLoadStateDidChangeNotification
object:self.mpc];
- (void)moviePlayerLoadStateChanged:(NSNotification *)notification
MPMoviePlayerController *moviePlayer = notification.object;
MPMovieLoadState loadState = moviePlayer.loadState;
if(loadState == MPMovieLoadStateUnknown)
// this is where the next/prev buttons notify
// there is no video in this state so load one
// just reload the default movie
NSLog(@"MPMovieLoadStateUnknown");
self.mpc.contentURL = self.fileURL;
[self.mpc prepareToPlay];
return;
else if(loadState & MPMovieLoadStatePlayable)
NSLog(@"MPMovieLoadStatePlayable");
else if(loadState & MPMovieLoadStatePlaythroughOK)
NSLog(@"MPMovieLoadStatePlaythroughOK");
else if(loadState & MPMovieLoadStateStalled)
NSLog(@"MPMovieLoadStateStalled");
【讨论】:
【参考方案5】:你改变MPMoviePlayerController
overlayView就像改变UIImagePickerController
overlayView来实现你需要的功能。
MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc]
initWithContentURL:someUrl];
moviePlayer.movieControlMode = MPMovieControlModeHidden;
[moviePlayer play];
NSArray *windows = [[UIApplication sharedApplication] windows];
if ([windows count] > 1)
UIWindow *moviePlayerWindow = [[UIApplication sharedApplication] keyWindow];
[moviePlayerWindow addSubview:yourCustomOverlayView];
【讨论】:
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