#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
@interface ZYAudioManager : NSObject
+ (instancetype)defaultManager;
 
//播放音乐
- (AVAudioPlayer *)playingMusic:(NSString *)filename;
- (void)pauseMusic:(NSString *)filename;
- (void)stopMusic:(NSString *)filename;
 
//播放音效
- (void)playSound:(NSString *)filename;
- (void)disposeSound:(NSString *)filename;
@end
 
 
 
#import "ZYAudioManager.h"
 
@interface ZYAudioManager ()
@property (nonatomic, strong) NSMutableDictionary *musicPlayers;
@property (nonatomic, strong) NSMutableDictionary *soundIDs;
@end
 
static ZYAudioManager *_instance = nil;
 
@implementation ZYAudioManager
 
+ (void)initialize
{
  // 音频会话
  AVAudioSession *session = [AVAudioSession sharedInstance];
   
  // 设置会话类型（播放类型、播放模式,会自动停止其他音乐的播放）
  [session setCategory:AVAudioSessionCategoryPlayback error:nil];
   
  // 激活会话
  [session setActive:YES error:nil];
}
 
+ (instancetype)defaultManager
{
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
    _instance = [[self alloc] init];
  });
  return _instance;
}
 
- (instancetype)init
{
  __block ZYAudioManager *temp = self;
   
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
    if ((temp = [super init]) != nil) {
      _musicPlayers = [NSMutableDictionary dictionary];
      _soundIDs = [NSMutableDictionary dictionary];
    }
  });
  self = temp;
  return self;
}
 
+ (instancetype)allocWithZone:(struct _NSZone *)zone
{
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
    _instance = [super allocWithZone:zone];
  });
  return _instance;
}
 
//播放音乐
- (AVAudioPlayer *)playingMusic:(NSString *)filename
{
  if (filename == nil || filename.length == 0) return nil;
   
  AVAudioPlayer *player = self.musicPlayers[filename];   //先查询对象是否缓存了
   
  if (!player) {
    NSURL *url = [[NSBundle mainBundle] URLForResource:filename withExtension:nil];
     
    if (!url) return nil;
     
    player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
     
    if (![player prepareToPlay]) return nil;
     
    self.musicPlayers[filename] = player;      //对象是最新创建的，那么对它进行一次缓存
  }
   
  if (![player isPlaying]) {         //如果没有正在播放，那么开始播放，如果正在播放，那么不需要改变什么
    [player play];
  }
  return player;
}
 
- (void)pauseMusic:(NSString *)filename
{
  if (filename == nil || filename.length == 0) return;
   
  AVAudioPlayer *player = self.musicPlayers[filename];
   
  if ([player isPlaying]) {
    [player pause];
  }
}
- (void)stopMusic:(NSString *)filename
{
  if (filename == nil || filename.length == 0) return;
   
  AVAudioPlayer *player = self.musicPlayers[filename];
   
  [player stop];
   
  [self.musicPlayers removeObjectForKey:filename];
}
 
//播放音效
- (void)playSound:(NSString *)filename
{
  if (!filename) return;
   
  //取出对应的音效ID
  SystemSoundID soundID = (int)[self.soundIDs[filename] unsignedLongValue];
   
  if (!soundID) {
    NSURL *url = [[NSBundle mainBundle] URLForResource:filename withExtension:nil];
    if (!url) return;
     
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &soundID);
     
    self.soundIDs[filename] = @(soundID);
  }
   
  // 播放
  AudioServicesPlaySystemSound(soundID);
}
 
//摧毁音效
- (void)disposeSound:(NSString *)filename
{
  if (!filename) return;
   
   
  SystemSoundID soundID = (int)[self.soundIDs[filename] unsignedLongValue];
   
  if (soundID) {
    AudioServicesDisposeSystemSoundID(soundID);
     
    [self.soundIDs removeObjectForKey:filename];  //音效被摧毁，那么对应的对象应该从缓存中移除
  }
}
@end

#import <XCTest/XCTest.h>
#import "ZYAudioManager.h"
#import <AVFoundation/AVFoundation.h>
 
@interface ZYAudioManagerTests : XCTestCase
@property (nonatomic, strong) AVAudioPlayer *player;
@end
static NSString *_fileName = @"10405520.mp3";
@implementation ZYAudioManagerTests
 
- (void)setUp {
  [super setUp];
  // Put setup code here. This method is called before the invocation of each test method in the class.
}
 
- (void)tearDown {
  // Put teardown code here. This method is called after the invocation of each test method in the class.
  [super tearDown];
}
 
- (void)testExample {
  // This is an example of a functional test case.
  // Use XCTAssert and related functions to verify your tests produce the correct results.
}
 
/**
 * 测试是否为单例，要在并发条件下测试
 */
- (void)testAudioManagerSingle
{
  NSMutableArray *managers = [NSMutableArray array];
   
  dispatch_group_t group = dispatch_group_create();
   
  dispatch_group_async(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    ZYAudioManager *tempManager = [[ZYAudioManager alloc] init];
    [managers addObject:tempManager];
  });
   
  dispatch_group_async(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    ZYAudioManager *tempManager = [[ZYAudioManager alloc] init];
    [managers addObject:tempManager];
  });
   
  dispatch_group_async(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    ZYAudioManager *tempManager = [[ZYAudioManager alloc] init];
    [managers addObject:tempManager];
  });
   
  dispatch_group_async(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    ZYAudioManager *tempManager = [[ZYAudioManager alloc] init];
    [managers addObject:tempManager];
  });
   
  dispatch_group_async(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    ZYAudioManager *tempManager = [[ZYAudioManager alloc] init];
    [managers addObject:tempManager];
  });
   
  ZYAudioManager *managerOne = [ZYAudioManager defaultManager];
   
  dispatch_group_notify(group, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
     
    [managers enumerateObjectsUsingBlock:^(ZYAudioManager *obj, NSUInteger idx, BOOL * _Nonnull stop) {
      XCTAssertEqual(managerOne, obj, @"ZYAudioManager is not single");
    }];
     
  });
}
 
/**
 * 测试是否可以正常播放音乐
 */
- (void)testPlayingMusic
{
  self.player = [[ZYAudioManager defaultManager] playingMusic:_fileName];
  XCTAssertTrue(self.player.playing, @"ZYAudioManager is not PlayingMusic");
}
 
/**
 * 测试是否可以正常停止音乐
 */
- (void)testStopMusic
{
  if (self.player == nil) {
    self.player = [[ZYAudioManager defaultManager] playingMusic:_fileName];
  }
   
  if (self.player.playing == NO) [self.player play];
   
  [[ZYAudioManager defaultManager] stopMusic:_fileName];
  XCTAssertFalse(self.player.playing, @"ZYAudioManager is not StopMusic");
}
 
/**
 * 测试是否可以正常暂停音乐
 */
- (void)testPauseMusic
{
  if (self.player == nil) {
    self.player = [[ZYAudioManager defaultManager] playingMusic:_fileName];
  }
  if (self.player.playing == NO) [self.player play];
  [[ZYAudioManager defaultManager] pauseMusic:_fileName];
  XCTAssertFalse(self.player.playing, @"ZYAudioManager is not pauseMusic");
}
 
@end

 #import "ZYMusicViewController.h"
#import "ZYPlayingViewController.h"
#import "ZYMusicTool.h"
#import "ZYMusic.h"
#import "ZYMusicCell.h"
 
@interface ZYMusicViewController ()
@property (nonatomic, strong) ZYPlayingViewController *playingVc;
 
@property (nonatomic, assign) int currentIndex;
@end
 
@implementation ZYMusicViewController
 
- (ZYPlayingViewController *)playingVc
{
  if (_playingVc == nil) {
    _playingVc = [[ZYPlayingViewController alloc] initWithNibName:@"ZYPlayingViewController" bundle:nil];
  }
  return _playingVc;
}
 
- (void)viewDidLoad {
  [super viewDidLoad];
   
  [self setupNavigation];
}
 
- (void)setupNavigation
{
  self.navigationItem.title = @"音乐播放器";
}
 
#pragma mark ----TableViewDataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
 
  return 1;
}
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
  return [ZYMusicTool musics].count;
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  ZYMusicCell *cell = [ZYMusicCell musicCellWithTableView:tableView];
  cell.music = [ZYMusicTool musics][indexPath.row];
  return cell;
}
 
#pragma mark ----TableViewDelegate
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
  return 70;
}
 
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
  [tableView deselectRowAtIndexPath:indexPath animated:YES];
   
  [ZYMusicTool setPlayingMusic:[ZYMusicTool musics][indexPath.row]];
   
  ZYMusic *preMusic = [ZYMusicTool musics][self.currentIndex];
  preMusic.playing = NO;
  ZYMusic *music = [ZYMusicTool musics][indexPath.row];
  music.playing = YES;
  NSArray *indexPaths = @[
              [NSIndexPath indexPathForItem:self.currentIndex inSection:0],
              indexPath
              ];
  [self.tableView reloadRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
   
  self.currentIndex = (int)indexPath.row;
   
  [self.playingVc show];
}
 
@end 

//得到挪动距离
  CGPoint point = [sender translationInView:sender.view];
  //将translation清空，免得重复叠加
  [sender setTranslation:CGPointZero inView:sender.view];

#import <UIKit/UIKit.h>
 
@interface ZYLrcView : UIImageView
@property (nonatomic, assign) NSTimeInterval currentTime;
@property (nonatomic, copy) NSString *fileName;
@end
 
 
 
#import "ZYLrcView.h"
#import "ZYLrcLine.h"
#import "ZYLrcCell.h"
#import "UIView+AutoLayout.h"
 
@interface ZYLrcView () <UITableViewDataSource, UITableViewDelegate>
@property (nonatomic, weak) UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *lrcLines;
/**
 * 记录当前显示歌词在数组里面的index
 */
@property (nonatomic, assign) int currentIndex;
@end
 
@implementation ZYLrcView
 
#pragma mark ----setter\geter方法
 
- (NSMutableArray *)lrcLines
{
  if (_lrcLines == nil) {
    _lrcLines = [ZYLrcLine lrcLinesWithFileName:self.fileName];
  }
  return _lrcLines;
}
 
- (void)setFileName:(NSString *)fileName
{
  if ([_fileName isEqualToString:fileName]) {
    return;
  }
  _fileName = [fileName copy];
  [_lrcLines removeAllObjects];
  _lrcLines = nil;
  [self.tableView reloadData];
}
 
- (void)setCurrentTime:(NSTimeInterval)currentTime
{
  if (_currentTime > currentTime) {
    self.currentIndex = 0;
  }
  _currentTime = currentTime;
   
  int minute = currentTime / 60;
  int second = (int)currentTime % 60;
  int msecond = (currentTime - (int)currentTime) * 100;
  NSString *currentTimeStr = [NSString stringWithFormat:@"d:d.d", minute, second, msecond];
   
  for (int i = self.currentIndex; i < self.lrcLines.count; i++) {
    ZYLrcLine *currentLine = self.lrcLines[i];
    NSString *currentLineTime = currentLine.time;
    NSString *nextLineTime = nil;
     
    if (i + 1 < self.lrcLines.count) {
      ZYLrcLine *nextLine = self.lrcLines[i + 1];
      nextLineTime = nextLine.time;
    }
     
    if (([currentTimeStr compare:currentLineTime] != NSOrderedAscending) && ([currentTimeStr compare:nextLineTime] == NSOrderedAscending) && (self.currentIndex != i)) {
       
       
      NSArray *reloadLines = @[
                   [NSIndexPath indexPathForItem:self.currentIndex inSection:0],
                   [NSIndexPath indexPathForItem:i inSection:0]
                   ];
      self.currentIndex = i;
      [self.tableView reloadRowsAtIndexPaths:reloadLines withRowAnimation:UITableViewRowAnimationNone];
       
       
      [self.tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForItem:self.currentIndex inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES];
    }
     
  }
}
#pragma mark ----初始化方法
 
- (instancetype)initWithFrame:(CGRect)frame
{
  if (self = [super initWithFrame:frame]) {
    [self commitInit];
  }
  return self;
}
 
- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
  if (self = [super initWithCoder:aDecoder]) {
    [self commitInit];
  }
  return self;
}
 
- (void)commitInit
{
  self.userInteractionEnabled = YES;
  self.image = [UIImage imageNamed:@"28131977_1383101943208"];
  self.contentMode = UIViewContentModeScaleToFill;
  self.clipsToBounds = YES;
  UITableView *tableView = [[UITableView alloc] init];
  tableView.delegate = self;
  tableView.dataSource = self;
  tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
  tableView.backgroundColor = [UIColor clearColor];
  self.tableView = tableView;
  [self addSubview:tableView];
  [self.tableView autoPinEdgesToSuperviewEdgesWithInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
}
 
#pragma mark ----UITableViewDataSource
 
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
  return 1;
}
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  return self.lrcLines.count;
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  ZYLrcCell *cell = [ZYLrcCell lrcCellWithTableView:tableView];
  cell.lrcLine = self.lrcLines[indexPath.row];
   
  if (indexPath.row == self.currentIndex) {
     
    cell.textLabel.font = [UIFont boldSystemFontOfSize:16];
  }
  else{
    cell.textLabel.font = [UIFont systemFontOfSize:13];
  }
  return cell;
}
 
- (void)layoutSubviews
{
  [super layoutSubviews];
   
//  NSLog(@"++++++++++%@",NSStringFromCGRect(self.tableView.frame));
  self.tableView.contentInset = UIEdgeInsetsMake(self.frame.size.height / 2, 0, self.frame.size.height / 2, 0);
}
@end