iphone - how can I request thumbnailImage from MPMoviePlayController while slider -


i have custom uisider control, send requestthumbnailimagesattimes mpmovieplayercontroller when slider control.

- (void)sliderpopoverview:(uislider*)slider {     self.currentslidervalue = slider.value;     [self.movieplayer requestthumbnailimagesattimes:[nsarray arraywithobject:[nsnumber numberwithdouble:self.currentslidervalue]]                                              timeoption:mpmovietimeoptionnearestkeyframe]; }   - (void)requestfinishthumbnail:(nsnotification*)notification {     uiimage *thumbnailimage = [notification.userinfo objectforkey:mpmovieplayerthumbnailimagekey];     if (thumbnailimage) {         _bottomview.sliderpopover.popover.thumbnailview.image = thumbnailimage;     }   }

then can receive lots of image show. main thread blocked. it's hard slider custom control. cost lots of time.

the reason may method

- (void)sliderpopoverview:(uislider*)slider

is called every time slider moved little bit. cause mpmovieplayercontroller generate thumbnails. should try reduce number of times call method generates thumbnails.


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