一旦我有MPMediaItemPropertyPersistentID，我如何播放歌曲？ [英] How do i play song back once i have MPMediaItemPropertyPersistentID?

问题描述

NSArray * songs = [[NSArray alloc] initWithArray:[[MPMediaQuery songsQuery] collections]];

for (MPMediaItemCollection * item in songs){

    NSString * persistentID = [[[item representativeItem]             valueForProperty:MPMediaItemPropertyPersistentID] stringValue];
    // Do something with it.
    ??? 

}

如果我有MPMediaItemPropertyPersistentID，我该如何播放歌曲？

How do i play song back once i have MPMediaItemPropertyPersistentID?

推荐答案

//Your song id NSString *songID;

MPMediaPropertyPredicate *predicate = [MPMediaPropertyPredicate predicateWithValue:songID forProperty:MPMediaItemPropertyPersistentID];

MPMediaQuery *mySongQuery = [[MPMediaQuery alloc] init]; 
//finding songs for predicate 
[mySongQuery addFilterPredicate: predicate];

//add songs to queue
[musicPlayer setQueueWithQuery:mySongQuery];

[musicPlayer play];

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