코어오디오 MediaPlayer 구현

MediaPlayer 구현

네비게이션

info.plist

storyboard

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <MPMediaPickerControllerDelegate>

@end

//MediaPlayer 임포트!

#import <MediaPlayer/MediaPlayer.h>

#import "ViewController.h"

@interface ViewController ()

@property (strong,nonatomic) MPMediaPickerController *mpPickerVC;                       //픽커 컨트롤러

@property (strong,nonatomic) MPMediaItemCollection *slctitems;                              //선택된 아이템

@property (strong,nonatomic) MPMusicPlayerController *appMusicPlayer;               //플레이어

@property (weak, nonatomic) IBOutlet UITextField *artistaSearchBar;

@property (weak, nonatomic) IBOutlet UITextView *soundsTV;

@property (weak, nonatomic) IBOutlet UIButton *previousBtn;

@property (weak, nonatomic) IBOutlet UIButton *playBtn;

@property (weak, nonatomic) IBOutlet UIButton *nextBtn;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    _mpPickerVC = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAnyAudio];

    _mpPickerVC.prompt = @"음악을 선택해 주세요";

    _mpPickerVC.allowsPickingMultipleItems = YES;

    _mpPickerVC.showsCloudItems = YES;

    _mpPickerVC.delegate = self;

    _appMusicPlayer = [MPMusicPlayerController systemMusicPlayer];

    

    

    

    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];

    

    //불륨이 변경될때

    [notificationCenter  addObserver: self

                            selector: @selector (onVolumeChange:)

                                name: MPMusicPlayerControllerVolumeDidChangeNotification

                              object: _appMusicPlayer];

     //상태가 변경될때

    [notificationCenter  addObserver: self

                            selector: @selector (onStateChange:)

                                name: MPMusicPlayerControllerPlaybackStateDidChangeNotification

                              object: _appMusicPlayer];

    

    //재생되는 음원이 변경될때

    [notificationCenter  addObserver: self

                            selector: @selector (onNowPlaying:)

                                name: MPMusicPlayerControllerNowPlayingItemDidChangeNotification

                              object: _appMusicPlayer];

    // 시작

    [_appMusicPlayer beginGeneratingPlaybackNotifications];

    

}

#pragma mark Notifaction

//상태가 변경될때

- (void) onStateChange: (NSNotification*) notification {

    NSLog(@"onStateChange - notification");

}

//플레이 음원이  변경될때

- (void) onNowPlaying: (NSNotification*) notification {

    NSLog(@"onNowPlaying - notification");

    MPMusicPlayerController *player = notification.object;

    MPMediaItem *item = [player nowPlayingItem];

    NSLog(@"now playing %@", [item valueForKey:MPMediaItemPropertyTitle]);

}

//볼륨이  변경될때

- (void) onVolumeChange: (NSNotification*) notification {

    NSLog(@"onVolumeChange - notification");

}

//미디어 픽커에서 곡이 선택될때 - 업데이트

-(void)updateList:(MPMediaItemCollection *) collection {

    

    NSString *txt = @"";

    NSString *tag = @"";

    for (MPMediaItem *item in [collection items]) {

        if(NULL == item){

            NSLog(@"null이 존재합니다.");

            continue;

        }

        

        NSString *title = [item valueForKey:MPMediaItemPropertyTitle];

        NSString *artist = [item valueForKey:MPMediaItemPropertyArtist];

        txt = [NSString stringWithFormat:@"%@ %@ %@ - %@",txt,tag,title,artist];

        tag = @"\n";

    }

    

    _soundsTV.text = txt;

    

}

//미디어 픽커 선택

- (IBAction)onPick:(id)sender {

    NSLog(@"%@", @"onPick 작동");

    

//     _mpPickerVC = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAnyAudio];

//    _mpPickerVC.prompt = @"음악을 선택해 주세요";

//    _mpPickerVC.allowsPickingMultipleItems = YES;

//    _mpPickerVC.showsCloudItems = YES;

//    _mpPickerVC.delegate = self;

    

    [self presentViewController:_mpPickerVC animated:YES completion:^{

       NSLog(@"%@", @"미디어 픽커 라이브러리를 선택했습니다.");

    }];

    

}

//가수이름으로 곡 찾기

-(void)quertArtist : (NSString *)artist {

    //초기화

    MPMediaQuery *artistQry = [[MPMediaQuery alloc]init];

    MPMediaPropertyPredicate *artistNamePredicate =

    [MPMediaPropertyPredicate predicateWithValue:artist forProperty:MPMediaItemPropertyArtist];

    [artistQry addFilterPredicate:artistNamePredicate];

    

    //null 체크

    for (MPMediaItem *item in [artistQry items]) {

        if (NULL == item) {

            NSLog(@"null 값이 존재합니다.");

            continue;

        }

        //정보 추출

        NSString *title = [item valueForKey:MPMediaItemPropertyTitle];

        NSURL  *url = [item valueForKey:MPMediaItemPropertyAssetURL];

        NSString *artist = [item valueForKey:MPMediaItemPropertyArtist];

        NSString *lyrics = [item valueForKey:MPMediaItemPropertyLyrics];

        MPMediaItemArtwork *artwork = [item valueForProperty: MPMediaItemPropertyArtwork];

        UIImage *artworkImage = [artwork imageWithSize: CGSizeMake(200, 200)];

        

        NSLog(@"After search with sound: %@ with url %@ artist is %@", title, [item valueForKey:MPMediaItemPropertyAssetURL], [item valueForKey:MPMediaItemPropertyArtist]);

        

    }// forin -end

    

    

    _slctitems = [MPMediaItemCollection collectionWithItems:artistQry.items];

    [_previousBtn setEnabled:NO];

    //목록 업데이트

    [self updateList:_slctitems];

    [_appMusicPlayer setQueueWithItemCollection:_slctitems];

    

    

}

- (IBAction)onQuery:(id)sender {

     NSLog(@"%@", @"onQuery 버튼 작동");

    

    if (_artistaSearchBar.text == NULL || _artistaSearchBar.text.length == 0) {

        return;

    }

    

    //검색바의 텍스트를 쿼리아티스트 메소드에 넘겨줌

    [self quertArtist:_artistaSearchBar.text];

    

    

}

- (IBAction)onPrevious:(id)sender {

     NSLog(@"%@", @"onPrevious 버튼 클릭");

    NSLog(@"현재 재생되고 있는 노래 index : %lu", (unsigned long)_appMusicPlayer.indexOfNowPlayingItem);

    NSLog(@"queue에 존재하는 음악 목록 총 개수: %lu", (_slctitems.count));

    if (NULL == _appMusicPlayer) {

        return;

    }

    

    if (_appMusicPlayer.indexOfNowPlayingItem <=1) {

        [_previousBtn setEnabled:NO];

    }

    [_appMusicPlayer skipToPreviousItem];

    

    [_nextBtn setEnabled:YES];

}

- (IBAction)onPlay:(id)sender {

    NSLog(@"%@", @"onPlay 버튼 클릭");

    NSLog(@"현재 재생되고 있는 노래 index : %lu", (unsigned long)_appMusicPlayer.indexOfNowPlayingItem);

    NSLog(@"queue에 존재하는 음악 목록 총 개수: %lu", (_slctitems.count));

    

    static BOOL isPlay = NO;

    if (NULL == _appMusicPlayer) {

         NSLog(@"%@", @"null이 존재합니다.");

        return;

    }

    

    

    /*

     //MPMusicPlayerController에 큐가 없을 경우 에러 발생

     2019-02-28 16:33:03.475540+0900 MediaPlayer[7370:1670897] [SDKPlayback] -[MPMusicPlayerController prepareToPlay] completed error: Error Domain=MPMusicPlayerControllerErrorDomain Code=1 "prepareToPlay without a queue" UserInfo={NSDebugDescription=prepareToPlay without a queue}

     */

    

    

    if (!isPlay) {

        isPlay = YES;

        [_playBtn setTitle:@"stop" forState:UIControlStateNormal];

        [_appMusicPlayer play];

    }else{

        isPlay = NO;

        [_playBtn setTitle:@"Play" forState:UIControlStateNormal];

        [_appMusicPlayer pause];

    }

    

}

- (IBAction)onNext:(id)sender {

     NSLog(@"%@", @"onNext 버튼 클릭");

    NSLog(@"현재 재생되고 있는 노래 index : %lu", (unsigned long)_appMusicPlayer.indexOfNowPlayingItem);

    NSLog(@"queue에 존재하는 음악 목록 총 개수: %lu", (_slctitems.count));

    if (_appMusicPlayer.indexOfNowPlayingItem >= (_slctitems.count -2)) {

        [_nextBtn setEnabled:NO];

    }

    

    [_appMusicPlayer skipToNextItem];

    

    [_previousBtn setEnabled:YES];

}

#pragma mark  MPMediaPickerControllerDelegate

//미디어 픽커 선택

- (void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection{

     NSLog(@"%@", @"didPickMediaItems - 선택되었습니다.");

    

    //선택한 음원 개수

    NSLog(@"picked with %lu items", (unsigned long)[mediaItemCollection count]);

    

    //null 값 체크

    if (NULL == mediaItemCollection) {

        NSLog(@"mediaItemCollection이 null 입니다.");

        return;

    }

    

    //선택한 음원들 하나하나 null 값 체크

    for (MPMediaItem *item in [mediaItemCollection items]) {

        if (NULL == item) {

            NSLog(@"item이 null 입니다.");

            continue;

        }

        

        NSString *title = [item valueForKey:MPMediaItemPropertyTitle];

        NSString *url = [item valueForKey:MPMediaItemPropertyAssetURL];

        NSString *artist = [item valueForKey:MPMediaItemPropertyArtist];

        

        NSLog(@"title : %@" , title);

        NSLog(@"url : %@" , url);

        NSLog(@"artist : %@" , artist);

    } //for - end

    

    _slctitems = mediaItemCollection;

    [_appMusicPlayer setQueueWithItemCollection:_slctitems];

    [self updateList:_slctitems];

    [_previousBtn setEnabled:NO];

    [_mpPickerVC dismissViewControllerAnimated:YES completion:^{

        //

    }];

}

//미디어 픽커 취소 델리게이트 메소드

- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker{

     NSLog(@"%@", @"mediaPickerDidCancel -  취소클릭");

    [_mpPickerVC dismissViewControllerAnimated:YES completion:^{

        NSLog(@"%@", @"mediaPickerDidCancel -  닫혔습니다.");

    }];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

파일

MediaPlayer.zip