Playing system music by UIMPMediaPickerController in iOS

Playing system music by UIMPMediaPickerController in iOS

The layout is as follows:

 

Introduction framework:

# Import

# Import

Follow the protocol and introduce header files

 

#import ViewController.h#import #import 
 
  @interface ViewController ()
  
   @end@implementation ViewController
  
 

Click Event:

 

 

-(IBAction) pickMusicAction :( UIButton *) sender {// create an MPMediaPickerController and specify the media type for it // media type: including music, audio, etc. // MPMediaTypeMovie // MPMediaTypeMusic MPMediaPickerController * mediaPC = [[MPMediaPickerController alloc] initWithMediaTypes :( MPMediaTypeMusic)]; if (mediaPC! = Nil) {NSLog (@ Successfully instantiated a media picker); // set related attributes // proxy mediaPC. delegate = self; // The prompt text mediaPC. prompt = @ select the music to be played; // whether multiple mediaPC files can be selected at a time. allowsPickingMultipleItems = YES; [self presentViewController: mediaPC animated: YES completion: nil];} else {NSLog (@ cocould not instantiate a media picker );}}

 

// Obtain the selected song using the proxy method

// MPMediaItemCollection multimedia item set

// MPMediaItem a single multimedia item, such as a song

// Collection is a set of Ordered items.

-(Void) mediaPicker :( MPMediaPickerController *) mediaPicker didPickMediaItems :( MPMediaItemCollection *) mediaItemCollection {NSLog (, mediaItemCollection ); // MPMusicPlayerController can play music in the music library. // MPMusicPlayerController provides two types of players: applicationMusicPlayer and iPodMusicPlayer. iPodMusicPlayer is used here. The former automatically stops playing music after the application exits, and the latter does not exit playing after the application stops. MPMusicPlayerController * musicPC = [[MPMusicPlayerController alloc] init]; // MPMusicPlayerController loads music differently from AVAudioPlayer. AVAudioPlayer loads music in a file path, while MPMusicPlayerController requires a playing queue, it is precisely because its source of playing audio is a queue that MPMusicPlayerController supports operations such as the previous and next songs. [MusicPC setQueueWithItemCollection: mediaItemCollection]; [musicPC play];}

// Cancel the action after selection-(void) mediaPickerDidCancel :( MPMediaPickerController *) mediaPicker {NSLog (@ Media Picker was canceled); [mediaPicker failed: YES completion: nil];}

Final effect: