音樂

頭文件：

#import <AVFoundation/AVFoundation.h>

代理：

AVAudioPlayerDelegate

單例頭文件：

#import "Singleton.h"

@interface music : NSObject

@property (nonatomic, copy) NSString *nameyinyue;

@property (nonatomic, copy) NSString *nameyinxiao;

@property (nonatomic, strong) AVAudioPlayer *audioPlayer;

+ (music *) sharedInstance;

@end

 

@property(strong,nonatomic) music *music_t;

_music_t=[music sharedInstance];

#pragma mark -懶加載
-(AVAudioPlayer *)audioPlayer
{
    if (!_music_t.audioPlayer ) {
        
        // 0. 設置後臺音頻會話
        [self setBackGroundPlay];
        
        // 1. 獲取資源URL
        NSURL *url = [[NSBundle mainBundle]  URLForResource:@"櫻花櫻花想見你.mp3" withExtension:nil];
        
        // 2. 根據資源URL, 建立 AVAudioPlayer 對象
        _music_t.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
        
        // 2.1 設置容許倍速播放
        self.audioPlayer.enableRate = YES;
        
        // 3. 準備播放
        [_music_t.audioPlayer prepareToPlay];
        
        // 4. 設置代理, 監聽播放事件
        _music_t.audioPlayer.delegate = self;
    }
    return _music_t.audioPlayer;
}

- (void)setBackGroundPlay
{
    // 1. 設置會話模式
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil]; ;
    
    // 2. 激活會話
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    
    
}

//點擊播放或者暫停
-(void)btn1ButtonAction:(UIButton *)btn {
    if ([_music_t.nameyinxiao isEqualToString:@"暫停音效"]) {
        [self initWithYinxiao];
    }
    if ([_music_t.nameyinyue isEqualToString:@"播放音樂"]) {
        [self.audioPlayer play];
        NSLog(@"+++++++++++++++");
        self.audioPlayer.numberOfLoops = -1;
        _music_t.nameyinyue=@"暫停音樂";
    }
    else{
        [self.audioPlayer pause];
        NSLog(@"--------------");
        _music_t.nameyinyue=@"播放音樂";
    }
    [_btnYinyue setImage:[UIImage imageNamed:_music_t.nameyinyue] forState:UIControlStateNormal];
}