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這篇文章將為大家詳細講解有關iOS怎樣實現鎖屏頁面控制音樂播放,小編覺得挺實用的,因此分享給大家做個參考,希望大家閱讀完這篇文章后可以有所收獲。
具體內容如下
//1、調整音頻會話設置,確保應用進入后臺或靜音開關已開啟時音頻仍將繼續播放//2、鎖屏狀態下顯示媒體信息//3、鎖屏上的空間可以控制音頻播放#import "ViewController.h"#import <AVFoundation/AVFoundation.h>#import <MediaPlayer/MediaPlayer.h>@interface ViewController ()@property (nonatomic, strong) AVAudioPlayer *audioPlayer;@property (weak, nonatomic) UIButton *playButton;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; UIButton * playButton = [UIButton buttonWithType:UIButtonTypeSystem]; playButton.frame = CGRectMake(0, 0, 200, 40); playButton.center = self.view.center; [playButton setTitle:@"在后臺播放音頻" forState:UIControlStateNormal]; [playButton addTarget:self action:@selector(playMusicInBackground:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:playButton]; NSError *playerInitError = nil; NSString *audioPath = [[NSBundle mainBundle] pathForResource:@"background_audio" ofType:@"mp3"]; NSURL *audioURL = [NSURL fileURLWithPath:audioPath]; self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioURL error:&playerInitError]; AVAudioSession *session = [AVAudioSession sharedInstance]; NSError *activeError = nil; if (![session setActive:YES error:&activeError]) { NSLog(@"Failed to set active audio session!"); } //No.1 //開始寫代碼,調整音頻會話設置,確保即便應用進入后臺或靜音開關已開啟,音頻仍將繼續播放 NSError *categoryError = nil; [session setCategory:AVAudioSessionCategoryPlayback error:&categoryError]; //end_code}- (void)playMusicInBackground:(id)sender { if ([self.audioPlayer isPlaying]) { [self.audioPlayer stop]; [self.playButton setTitle:@"正在播放音樂" forState:UIControlStateNormal]; } else { UIImage *lockImage = [UIImage imageNamed:@"belongToMe.jpg"]; MPMediaItemArtwork *artwork = [[MPMediaItemArtwork alloc] initWithImage:lockImage]; NSDictionary *mediaDict = @{ MPMediaItemPropertyTitle: @"BackgroundTask Audio", MPMediaItemPropertyMediaType: @(MPMediaTypeAnyAudio), MPMediaItemPropertyPlaybackDuration: @(self.audioPlayer.duration), MPNowPlayingInfoPropertyPlaybackRate: @1.0, MPNowPlayingInfoPropertyElapsedPlaybackTime: @(self.audioPlayer.currentTime), MPMediaItemPropertyAlbumArtist: @"Some User", MPMediaItemPropertyArtist: @"Some User", MPMediaItemPropertyArtwork: artwork }; [self.audioPlayer play]; [self.playButton setTitle:@"停止播放后臺音樂" forState:UIControlStateNormal]; //No.2 //開始寫代碼,將媒體信息顯示在鎖定屏幕上,并使鎖屏上控件可以控制音頻播放 [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; //end_code }}//No.3//開始寫代碼,響應遠程控制,使得進入鎖屏狀態后可以控制音樂“播放”和“暫停”- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent { if (receivedEvent.type == UIEventTypeRemoteControl) { switch (receivedEvent.subtype) { case UIEventSubtypeRemoteControlPlay: [self.audioPlayer play]; break; case UIEventSubtypeRemoteControlPause: [self.audioPlayer pause]; break; default: NSLog(@"沒有處理過這個事件------receivedEvent.subtype==%ld",(long)receivedEvent.subtype); break; } }}//end_code- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning];}@end
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