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现在的手机的基本上没有人不停音乐的,我们无法想象在一个没有声音的世界里我们会过的怎么样,国内现在的主流的主流网易云音乐,QQ音乐,酷狗,虾米,天天基本上霸占了所有的用户群体,不过并没有妨碍大家对音乐的追求,乐流算是突围成功了,据说卖给QQ啦,有兴趣的可以看下。我们做不了那么高大上的就先做个简单的,最核心的就是播放,暂停,切歌,其他的基本上围绕这个修修补补锦上添花的,比如说歌曲名称,专辑,谁听了这首歌。。。铺垫的多了,直接看效果吧,三个按钮一个进度条:
初始化按钮:
self.playButton=[[UIButton alloc]initWithFrame:CGRectMake(40, 100, 60, 30)]; [self.playButton setTitle:@"播放" forState:UIControlStateNormal]; [self.playButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [self.playButton.titleLabel setFont:[UIFont systemFontOfSize:14]]; self.playButton.layer.borderColor=[UIColor blackColor].CGColor; self.playButton.layer.borderWidth=1.0; self.playButton.layer.cornerRadius=5.0; [self.playButton addTarget:self action:@selector(playMusic:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:self.playButton]; self.pauseButton=[[UIButton alloc]initWithFrame:CGRectMake(140, 100, 60, 30)]; [self.pauseButton setTitle:@"暂停" forState:UIControlStateNormal]; [self.pauseButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [self.pauseButton.titleLabel setFont:[UIFont systemFontOfSize:14]]; self.pauseButton.layer.borderColor=[UIColor blackColor].CGColor; self.pauseButton.layer.borderWidth=1.0; self.pauseButton.layer.cornerRadius=5.0; [self.pauseButton addTarget:self action:@selector(pauseMusic:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:self.pauseButton]; self.switchButton=[[UIButton alloc]initWithFrame:CGRectMake(240, 100, 60, 30)]; [self.switchButton setTitle:@"切歌" forState:UIControlStateNormal]; [self.switchButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [self.switchButton.titleLabel setFont:[UIFont systemFontOfSize:14]]; self.switchButton.layer.borderColor=[UIColor blackColor].CGColor; self.switchButton.layer.borderWidth=1.0; self.switchButton.layer.cornerRadius=5.0; [self.switchButton addTarget:self action:@selector(switchMusic:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:self.switchButton];
初始化进度条:
self.progressView=[[UIProgressView alloc]initWithFrame:CGRectMake(40, 180, 200, 50)]; [self.view addSubview:self.progressView];
AVAudioPlayer可以看成一个简易播放器,支持多种音频格式,能够进行进度、音量、播放速度等控制,已经满足了基本需求,接下来是播放音乐的代码:
if (self.audioPlayer.isPlaying) { [self.audioPlayer pause]; }else{ [self loadMusicByAsset:[[AVURLAsset alloc] initWithURL:[[NSBundle mainBundle] URLForResource:@"我最亲爱的" withExtension:@"mp3"] options:nil]]; [self.audioPlayer play]; }
实例化AVAudioPlayer:
-(void)loadMusicByAsset:(AVURLAsset*)avUrlAsset { if ([[NSFileManager defaultManager] fileExistsAtPath:avUrlAsset.URL.path]){ NSError *error=nil; self.audioPlayer= [[AVAudioPlayer alloc] initWithContentsOfURL:avUrlAsset.URL error:&error]; self.audioPlayer.delegate=self; //准备buffer,减少播放延时的时间 [self.audioPlayer prepareToPlay]; [self.audioPlayer setVolume:1]; //设置音量大小 self.audioPlayer.numberOfLoops =0;//设置播放次数,0为播放一次,负数为循环播放 if (error) { NSLog(@"初始化错误:%@",error.localizedDescription); } } }
上面是通过AVURLAsset实例化的,还可以直接通过名称实例化:
-(void)loadMusic:(NSString*)name { NSString *musicFilePath = [[NSBundle mainBundle] pathForResource:name ofType:@"mp3"]; //创建音乐文件路径 if ([[NSFileManager defaultManager] fileExistsAtPath:musicFilePath]){ NSURL *musicURL = [[NSURL alloc] initFileURLWithPath:musicFilePath]; NSError *error=nil; self.audioPlayer= [[AVAudioPlayer alloc] initWithContentsOfURL:musicURL error:&error]; self.audioPlayer.delegate=self; //准备buffer,减少播放延时的时间 [self.audioPlayer prepareToPlay]; [self.audioPlayer setVolume:1]; //设置音量大小 self.audioPlayer.numberOfLoops =0;//设置播放次数,0为播放一次,负数为循环播放 if (error) { NSLog(@"初始化错误:%@",error.localizedDescription); } } }
暂停音乐,这里为了方便单独写了一个按钮,大多数情况下,播放是暂停都是同一个按钮,仅供参考:
-(void)pauseMusic:(UIButton *)sender{ if (self.audioPlayer.isPlaying) { [self.audioPlayer pause]; } }
切歌就是通常大家点的上一曲下一曲,很好理解:
-(void)switchMusic:(UIButton *)sender{ [self.audioPlayer stop]; [self loadMusicByAsset:[[AVURLAsset alloc] initWithURL:[[NSBundle mainBundle] URLForResource:@"我需要一美元" withExtension:@"mp3"] options:nil]]; [self.audioPlayer play]; }
通过timer实时更新进度条:
self.timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(changeProgress) userInfo:nil repeats:YES];
进度更新:
-(void)changeProgress{ if (self.audioPlayer.isPlaying) { self.progressView.progress =self.audioPlayer.currentTime/self.audioPlayer.duration; } }
效果如下:
音乐播放完成之后可以在AVAudioPlayerDelegate的代理方法里面根据业务场景执行自己安排:
-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{ // [self.timer invalidate];直接销毁,之后不可用,慎重考虑 // [self.timer setFireDate:[NSDate date]]; //继续 // [self.timer setFireDate:[NSDate distantPast]];//开启 [self.timer setFireDate:[NSDate distantFuture]];//暂停 }
基本上最常用就这么多了,周末愉快~
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原文地址:http://www.cnblogs.com/xiaofeixiang/p/4540286.html