#import "ViewController.h"
#import

@interface ViewController ()
/**
* 背景图片
*/
@property (weak, nonatomic) IBOutlet UIImageView *bgImageView;

/** 播放器 */
@property (nonatomic, strong) AVPlayer *player;

@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];

  // 1.加毛玻璃
  UIToolbar *toolbar = [[UIToolbar alloc] init];

  // 2. 设置frame
  toolbar.frame = self.bgImageView.bounds;

  // 3. 设置样式和透明度
  toolbar.barStyle = UIBarStyleBlack;
  toolbar.alpha = 0.98;

  // 4.加到背景图片上
  [self.bgImageView addSubview:toolbar];

  // 5.创建播放器
  /*
  NSString *path = [[NSBundle mainBundle] pathForResource:@"mySong1.mp3" ofType:nil];
  NSURL *url = [NSURL fileURLWithPath:path];
  */
  // 资源的URL地址
  NSURL *url = [[NSBundle mainBundle] URLForResource:@"mySong1.mp3" withExtension:nil];
  // 创建播放器曲目
  AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:url];
  // 创建播放器
  self.player = [[AVPlayer alloc] initWithPlayerItem:playerItem];

}

/**
* 播放/暂停
*
* @param button 按钮
*/

• (IBAction)playOrPause:(UIButton *)button {
  switch (button.tag) {
  case 3:
  [self.player play]; // 播放
  break;
  case 4:
  [self.player pause]; // 暂停
  break;
  default:
  break;
  }
  }

/**
* 切换歌曲
*
* @param button 按钮
*/

• (IBAction)changeMusic:(UIButton *)button {
  // 歌曲的名称
  NSString *musicName = nil;
  switch (button.tag) {
  case 1:// 上一首
  musicName = @"mySong2.mp3";
  break;
  case 2:// 下一首
  musicName = @"mySong3.mp3";
  break;
  default:
  break;
  }

  NSURL *url = [[NSBundle mainBundle] URLForResource:musicName withExtension:nil];
  AVPlayerItem *playerItem = [[AVPlayerItem alloc] initWithURL:url];
  [self.player replaceCurrentItemWithPlayerItem:playerItem];

  // 播放
  [self.player play];
  }

@end