因为涉及到项目的开发，所以这里只把PlayerCenter单例类中的代码进行展示，仅做参考，其中包含上一曲，暂停/播放，下一曲等功能，项目中也涉及到了后台播放和操作的功能，具体的使用大家可以继续研究，或者给我留言，等有空写一个Demo给大家分享
PlayCenter.h
#import <Foundation/Foundation.h>#import <AVFoundation/AVFoundation.h>#import <MediaPlayer/MediaPlayer.h>#import <AudioToolbox/AudioToolbox.h>#import "define.h"@interface PlayCenter : NSObject@property (nonatomic,strong) AVAudioPlayer *player;//音频对象@property (nonatomic,strong) NSDictionary *musicInfo;//音频信息@property(nonatomic,strong)NSArray *musicArray;//音频数组@property(nonatomic,assign)NSInteger allNum;//音乐数量@property(nonatomic,assign)NSInteger currentInt;//当前第几个音乐@property(nonatomic,copy)NSString *currentUrlPathStr;//当前音频地址//创建播放单例类+ (PlayCenter *)shareCenter;//记录音频播放的数组，并且根据点击的音频找到本地url地址，进行音乐播放//- (NSDictionary *)play:(NSURL *)url;- (NSDictionary *)play:(NSArray *)musicArray clickMusicPath:(NSDictionary *)urlDic;//播放音频- (void)play;//暂停音频- (void)pause;//上一首- (void)forwardItem;//下一首- (void)nextItem;@end
PlayCenter.m
#import "PlayCenter.h"@implementation PlayCenterstatic PlayCenter *center = nil;+ (PlayCenter *)shareCenter{ if (!center) { center = [PlayCenter new]; } return center; }- (id)init{ if (self = [super init]) { //后台播放音频设置 AVAudioSession *session = [AVAudioSession sharedInstance]; [session setCategory:AVAudioSessionCategoryPlayback error:nil]; [session setActive:YES error:nil]; //让app支持接受远程控制事件 [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; self.currentUrlPathStr = @"1"; } return self;}- (NSDictionary *)play:(NSArray *)musicArray clickMusicPath:(NSDictionary *)urlDic{ self.musicArray = [NSArray arrayWithArray:musicArray]; self.allNum = musicArray.count; self.musicInfo = urlDic; for (int i = 0; i < self.allNum; i++) { NSDictionary *dic = self.musicArray[i]; if ([dic[@"filename"] isEqualToString:urlDic[@"filename"]]) { self.currentInt = i; } } NSString *path1 = [NSString stringWithFormat:@"%@/%@",[[NSUserDefaults standardUserDefaults]objectForKey:MP3URLPATH],urlDic[@"filename"]]; //判断当前的当前音频是否一致 if (![path1 isEqualToString:self.currentUrlPathStr]) { //如果不一致，音频对象滞空 //播放之前先滞空 [self.player stop]; self.player = nil; self.currentUrlPathStr = path1; //NSLog(@"。。。。。。/.....地址%@",path1); } NSURL *url = [NSURL fileURLWithPath:path1]; //如果音频已经播放，不再重新播放 if (self.player.playing) { return urlDic; } UIBackgroundTaskIdentifier bgTask = 0; //判断是否有音频对象，没有创建 if (_player == nil) { _player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; } if([UIApplication sharedApplication].applicationState== UIApplicationStateBackground) { //NSLog(@"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx后台播放"); [_player play]; UIApplication *app = [UIApplication sharedApplication]; UIBackgroundTaskIdentifier newTask = [app beginBackgroundTaskWithExpirationHandler:nil]; if(bgTask!= UIBackgroundTaskInvalid) { [app endBackgroundTask: bgTask]; } bgTask = newTask; }else{ //NSLog(@"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx前台播放"); [_player prepareToPlay]; [_player setVolume:1.0]; _player.numberOfLoops = 1; //设置音乐播放次数 -1为一直循环 [_player play]; //播放 //NSLog(@"音频正在播放。。。。。。。"); } return urlDic; }
- (void)forwardItem{ //根据当前播放的是第几个，进行下一个播放 _currentInt--; if (_currentInt < 0) { _currentInt = self.allNum-1; } //这个地方获取到了本地音频的地址，所以可以直接播放上一首 NSDictionary *dic = self.musicArray[_currentInt]; //播放上一首之前先停止，然后注销 //[self.player stop]; //self.player = nil; [self play:_musicArray clickMusicPath:dic]; }- (void)nextItem{ //根据当前播放的是第几个，进行下一个播放 _currentInt++; if (_currentInt > self.allNum-1) { _currentInt = 0; } //这个地方获取到了本地音频的地址，所以可以直接播放上一首 NSDictionary *dic = self.musicArray[_currentInt]; //播放上一首之前先停止，然后注销 //[self.player stop]; //self.player = nil; [self play:_musicArray clickMusicPath:dic];}- (void)play{ if (self.player.playing) { return; } [self.player play];}- (void)pause{ [self.player pause];}
单例类源码下载：https://github.com/hbblzjy/PlayCenterModel
