Tag: 客观基础

MPMediaItem不使用MPMediaItemPropertyAssetURL在AVAudioPlayer中播放

我有这个代码，find并播放MPMediaItem： MPMediaPropertyPredicate *predicate = [MPMediaPropertyPredicate predicateWithValue:self.persistentIDOfSongToPlay forProperty:MPMediaItemPropertyPersistentID comparisonType:MPMediaPredicateComparisonContains]; NSSet *predicateSet = [NSSet setWithObject:predicate]; MPMediaQuery *searchQuery = [[MPMediaQuery alloc] initWithFilterPredicates:predicateSet]; NSArray *queryResults = [searchQuery items]; NSLog(@"count: %i", queryResults.count); MPMediaItem *item = [queryResults objectAtIndex:0]; NSLog(@"item: %@", item); NSURL *itemURL = [item valueForProperty:MPMediaItemPropertyAssetURL]; NSLog(@"url: %@", itemURL); NSError *error; AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:itemURL error:&error]; [audioPlayer prepareToPlay]; [audioPlayer […]