目前國內的視頻播放器中，支持 DLNA 播放比較好的是：騰訊視頻。   剛才反編了一下他們的代碼，發現使用了一個開源庫，   地址：https://github.com/FuruyamaTakeshi/DLNA   並且在這個庫的基礎了做了一層封裝，包含如下幾個類：   DLNAController:      1 @class CGUpnpAvController, CGUpnpAvRenderer, QLUpnpAVVolumeInfo, NSMutableArray, QLUpnpAVPositionInfo, NSString, NSTimer;  2 @protocol DLNAControllerDelegate;  3   4 @interface DLNAController : XXUnknownSuperclass <CGUpnpControlPointDelegate> {  5 @private  6     dispatch_queue_s* _playQueue;    // 4 = 0x4  7     dispatch_queue_s* _searchQueue;    // 8 = 0x8  8     CGUpnpAvRenderer* _dlnaPlayingRender;    // 12 = 0xc  9     CGUpnpAvRenderer* _dlnaSelectedRender;    // 16 = 0x10 10     CGUpnpAvController* _upnpAvController;    // 20 = 0x14 11     NSMutableArray* _dlnaRenders;    // 24 = 0x18 12     NSTimer* _timerLoadInfos;    // 28 = 0x1c 13     BOOL _isSettingVolume;    // 32 = 0x20 14     BOOL _isSettingSeek;    // 33 = 0x21 15     id<DLNAControllerDelegate> delegate;    // 36 = 0x24 16     float _trackDuration;    // 40 = 0x28 17     float _curPlayTime;    // 44 = 0x2c 18     float _volumePercentage;    // 48 = 0x30 19     NSString* _curRenderName;    // 52 = 0x34 20     unsigned _fileSize;    // 56 = 0x38 21     QLUpnpAVPositionInfo* _positionInfo;    // 60 = 0x3c 22     QLUpnpAVVolumeInfo* _volumeInfo;    // 64 = 0x40 23     NSString* _curTitle;    // 68 = 0x44 24 } 25 @property(retain) QLUpnpAVPositionInfo* positionInfo;    // G=0x1ecead; S=0x1ecec5;  26 @property(retain) QLUpnpAVVolumeInfo* volumeInfo;    // G=0x1ecee9; S=0x1ecf01;  27 @property(readonly, assign) int dlnaRendersCount;    // G=0x1eabf5;  28 @property(readonly, assign) float volumePercentage;    // G=0x1eae41;  29 @property(readonly, assign) float curPlayTime;    // G=0x1ead59;  30 @property(readonly, assign) float trackDuration;    // G=0x1eadcd;  31 @property(readonly, assign) NSString* curRenderName;    // G=0x1eacc1;  32 @property(copy) NSString* curTitle;    // G=0x1ecf25; S=0x1ecf3d;  33 @property(assign) unsigned fileSize;    // G=0x1ece81; S=0x1ece95;  34 @property(assign) id<DLNAControllerDelegate> delegate;    // G=0x1ece55; S=0x1ece69;  35 +(id)sharedDLNAController;    // 0x1ea329 36 -(void)didFindRendersMain:(id)main;    // 0x1ecdfd 37 -(void)maitainConnectionMain:(id)main;    // 0x1ecdb5 38 -(void)loseConnectionMain:(id)main;    // 0x1eccc1 39 -(void)mainPlayStop:(id)stop;    // 0x1ecc65 40 -(void)mainPlayFailed:(id)failed;    // 0x1ecc1d 41 -(void)mainPlayDown:(id)down;    // 0x1ecbc1 42 -(BOOL)setVolume:(float)volume skipIfBusy:(BOOL)busy;    // 0x1eca55 43 -(BOOL)seek:(double)seek;    // 0x1ec8f9 44 -(BOOL)quit;    // 0x1ec719 45 -(BOOL)stop;    // 0x1ec5ed 46 -(BOOL)pause;    // 0x1ec4d1 47 -(BOOL)play;    // 0x1ec341 48 -(BOOL)isPlaying;    // 0x1ec305 49 -(void)controlPoint:(id)point deviceInvalid:(id)invalid;    // 0x1ec301 50 -(void)controlPoint:(id)point deviceUpdated:(id)updated;    // 0x1ec2fd 51 -(void)controlPoint:(id)point deviceRemoved:(id)removed;    // 0x1ebfa1 52 -(void)controlPoint:(id)point deviceAdded:(id)added;    // 0x1ebc61 53 -(void)searchReaders:(BOOL)readers;    // 0x1eb8a9 54 -(void)connection:(id)connection didReceiveResponse:(id)response;    // 0x1eb785 55 -(void)connectionDidFinishLoading:(id)connection;    // 0x1eb76d 56 -(void)connection:(id)connection didFailWithError:(id)error;    // 0x1eb719 57 -(void)playOnThreadWithInfo:(id)info;    // 0x1eb4e5 58 -(void)beginPlayDLNAWithUrl:(id)url;    // 0x1eb225 59 -(void)playURL:(id)url;    // 0x1eafc5 60 -(void)setRenderAtIndex:(int)index;    // 0x1eaea5 61 -(id)getRenderAtIndex:(int)index;    // 0x1eaafd 62 -(void)loadInfoOfDLNA;    // 0x1ea83d 63 -(void)stopTimers;    // 0x1ea80d 64 -(void)startTimers;    // 0x1ea7ad 65 -(void)clearAllInfos;    // 0x1ea76d 66 -(void)clearTimerInfo;    // 0x1ea71d 67 -(void)clearPlayInfo;    // 0x1ea5e5 68 -(id)init;    // 0x1ea539 69 -(void)dealloc;    // 0x1ea411 70 @end       DLNAControllerDelegate     1 @protocol DLNAControllerDelegate <NSObject> 2 -(void)dlnaControllerdidStoped:(id)stoped; 3 -(void)dlnaControllerdidMaitainConnection:(id)connection; 4 -(void)dlnaControllerdidLoseConnection:(id)connection; 5 -(void)dlnaControllerdidFailedToPlay:(id)play; 6 -(void)dlnaControllerdidStartToPlay:(id)play; 7 -(void)dlnaController:(id)controller didFindRenders:(id)renders; 8 @end       DLNAModel      1 @protocol DLNAModelDelegate;  2   3 @interface DLNAModel : XXUnknownSuperclass {  4 @private  5     id<DLNAModelDelegate> _delegate;    // 4 = 0x4  6 }  7 @property(assign, nonatomic) id<DLNAModelDelegate> delegate;    // G=0x1d2409; S=0x1d2419;   8 -(void)request:(id)request didFailLoadWithError:(id)error;    // 0x1d23c9  9 -(void)requestDidFinishLoad:(id)request;    // 0x1d2045 10 -(void)sendRequestWithVideoID:(id)videoID isPay:(BOOL)pay;    // 0x1d1ef5 11 @end       DLNAModelDelegate   @protocol DLNAModelDelegate <NSObject> -(void)DLNAModelDelegateRequestDidFail:(id)dlnamodelDelegateRequest; -(void)DLNAModelDelegateRequestDidSuccess:(id)dlnamodelDelegateRequest urlString:(id)string; @end     DLNAPlayBkgView     @class UIActivityIndicatorView, UILabel;   @interface DLNAPlayBkgView : XXUnknownSuperclass { @private     UILabel* _tmpLabel;    // 48 = 0x30     UIActivityIndicatorView* _tIndicator;    // 52 = 0x34 } @property(retain, nonatomic) UILabel* tmpLabel;    // G=0x1d0c25; S=0x1d0c35;  @property(retain, nonatomic) UIActivityIndicatorView* tIndicator;    // G=0x1d0c59; S=0x1d0c69;  -(void)setLableTip:(id)tip showActivity:(BOOL)activity;    // 0x1d0a5d -(id)initWithFrame:(CGRect)frame;    // 0x1d06c1 -(void)dealloc;    // 0x1d0669 @end       DLNASelectorView     @class UITableView, UIView; @protocol DLNASelectorViewDelegate;   @interface DLNASelectorView : XXUnknownSuperclass <UITableViewDataSource, UITableViewDelegate> { @private     UIView* _dlnaSearchingView;    // 48 = 0x30     UITableView* _dlnaTableView;    // 52 = 0x34     id<DLNASelectorViewDelegate> _delegate;    // 56 = 0x38     UIView* _tContentView;    // 60 = 0x3c     UIView* _noneDLNATipView;    // 64 = 0x40 } @property(retain, nonatomic) UIView* dlnaSearchingView;    // G=0x1d16c9; S=0x1d1e35;  @property(retain, nonatomic) UITableView* dlnaTableView;    // G=0x1d15dd; S=0x1d1e59;  @property(retain, nonatomic) UIView* noneDLNATipView;    // G=0x1d12cd; S=0x1d1ed1;  @property(retain, nonatomic) UIView* tContentView;    // G=0x1d1e9d; S=0x1d1ead;  @property(assign, nonatomic) id<DLNASelectorViewDelegate> delegate;    // G=0x1d1e7d; S=0x1d1e8d;  -(void)tableView:(id)view didSelectRowAtIndexPath:(id)indexPath;    // 0x1d1dc1 -(int)tableView:(id)view numberOfRowsInSection:(int)section;    // 0x1d1d8d -(id)tableView:(id)view cellForRowAtIndexPath:(id)indexPath;    // 0x1d1bf1 -(void)dlnaCloseDown:(id)down;    // 0x1d1bc5 -(void)dlnaRefreshDown:(id)down;    // 0x1d1b15 -(void)showSearchView;    // 0x1d1ab9 -(void)refreshSelectorTable;    // 0x1d18dd -(id)initWithFrame:(CGRect)frame;    // 0x1d0d11 -(void)dealloc;    // 0x1d0c91 @end       @protocol DLNASelectorViewDelegate <NSObject> -(void)DLNASelectorViewSelectedRender:(id)render; -(void)DLNASelectorViewWillClose:(id)dlnaselectorView; @end  QLUpnpAVPositionInfo:     @class CGUpnpAction;   @interface QLUpnpAVPositionInfo : XXUnknownSuperclass { @private     float _trackDuration;    // 4 = 0x4     float _absTime;    // 8 = 0x8     float _relTime;    // 12 = 0xc     CGUpnpAction* _upnpAction;    // 16 = 0x10 } @property(retain, nonatomic) CGUpnpAction* upnpAction;    // G=0x1f1eb5; S=0x1f1ec5;  @property(readonly, assign, nonatomic) float relTime;    // G=0x1f1ea5;  @property(readonly, assign, nonatomic) float absTime;    // G=0x1f1e95;  @property(readonly, assign, nonatomic) float trackDuration;    // G=0x1f1e85;  -(void)dealloc;    // 0x1f1e41 -(id)initWithAction:(id)action;    // 0x1f1d65 @end       QLUpnpAVVolumeInfo         @class CGUpnpAction;   @interface QLUpnpAVVolumeInfo : XXUnknownSuperclass { @private     float _currentVolumePercentage;    // 4 = 0x4     CGUpnpAction* _upnpAction;    // 8 = 0x8 } @property(retain, nonatomic) CGUpnpAction* upnpAction;    // G=0x1ed05d; S=0x1ed06d;  @property(readonly, assign, nonatomic) float currentVolumePercentage;    // G=0x1ed04d;  -(void)dealloc;    // 0x1ed009 -(id)initWithAction:(id)action;    // 0x1ecf61 @end    找時間閱讀下匯編代碼，給出他們實現的偽代碼。