IOS关于音乐播放器

1.搭建音乐播放器的界面

对于这个音乐播放器我只实现了播放  暂停  下一曲 上一曲 停止  音量加减 和从歌曲列表中选歌并播放的功能  更多功能 欢迎大家参考我的代码  进行修改，代码中有些不妥地方，还望各位大神指出。

整体界面搭建出来  是这个样子:

这个是播放列表的样子  我把它做成半透明的样式;

在搭建界面的时候  我们可以使用XIB来画   这样可以节约很多开发的时间  这个例子中 大多界面的地方我还是使用的纯代码实现  因为纯代码编写虽然有点耽误时间   但是将来进行版本控制的时候  非常方便.在使用XIB的时候  要注意的问题：

当你画了一个控件  点击右上角的辅助编辑器  你可以使用按住Ctrl  加鼠标左键   拖到你的编辑器  然后为你的控件取名字.   当你想删除的时候  一定要点击storyBord  在你要删除的空间的上面 右键  然后点击叉叉   就可以删除与代码区的绑定  。如果要再次绑定只需要再次Ctrl加鼠标左键   拖过来.

代码区：

#import "ViewController.h"#import#define WIDTH self.view.bounds.size.width#define HEIGHT self.view.bounds.size.height@interface ViewController (){

AVAudioPlayer *MyPlayer;//不能做成局部变量

NSTimer *timer;

NSMutableArray *songs;

NSUInteger myindex;

UIStepper *volumeStepper;

int index1;

UIView *view;

UITableView *myTableView;

NSMutableArray *dataArray;

}

@property (weak, nonatomic) IBOutlet UILabel *albumLabel;

@property (weak, nonatomic) IBOutlet UILabel *artistLabel;

@property (weak, nonatomic) IBOutlet UILabel *titleLabel;

@property (weak, nonatomic) IBOutlet UIImageView *coverImageView;

@property (weak, nonatomic) IBOutlet UIProgressView *playProgressView;

@end

@implementation ViewController

-(void)dealloc{

if (timer) {

[timer invalidate];

timer = nil;

}

}

- (void)viewDidLoad {

[super viewDidLoad];

myindex = 1;

_playProgressView.progress = 0;

songs = [NSMutableArray arrayWithObjects:@"月半小夜曲",@"后会无期",@"静静看着你",@"李白",@"喜欢你",@"Taylor Swift - Love Story (International Radio Mi", nil];

_coverImageView.layer.cornerRadius = 100;

_coverImageView.clipsToBounds = YES;

NSString *filename = [[NSBundle mainBundle] pathForResource:@"李白" ofType:@"mp3"];

//拿到mp3

// NSString *filename = [[NSBundle mainBundle] pathForResource:@"后会无期" ofType:@"mp3"];

NSURL *fileUrl = [NSURL fileURLWithPath:filename];

//先拿到文件  才能拿到数据  才能刷新

[self updateUI:fileUrl];

MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];

//设置支持后台播放后台播放

//获得当前音频会话对象的单例

AVAudioSession *audioSession = [AVAudioSession sharedInstance];

[audioSession setActive:YES error:nil];

[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

//打开项目  capabilities--->   background modes--->  打开audio and airplay  设置支持后台播放

//打开项目  capabilities--->   background modes--->  打开remote notifications 设置支持耳机

[[UIApplication sharedApplication]beginReceivingRemoteControlEvents];

//声道

// player.pan = -1;

//音乐大小  0~1   最大值可以修改  是一种软修改

//MyPlayer.volume = 1;

//文件播放速率  用于快进 快退

//player.enableRate = YES;

//player.rate = 4;

//跳过20s再播放

//MyPlayer.currentTime = 270;

MyPlayer.delegate = self;

//文件缓存

//[MyPlayer prepareToPlay];

//播放音乐

// [MyPlayer play];

//    progressSlider  = [[UISlider alloc]initWithFrame:CGRectMake(65, 440, 245, 15)];

//

//    [progressSlider addTarget:self action:@selector(progressValueChange) forControlEvents:UIControlEventValueChanged];

//    [self.view addSubview:progressSlider];

timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(progressChange) userInfo:nil repeats:YES];

timer.fireDate = [NSDate distantFuture];

#if 0

volumeStepper = [[UIStepper alloc]initWithFrame:CGRectMake(WIDTH/3+15, 4*HEIGHT/7, 30, 20)];

[volumeStepper addTarget:self action:@selector(volumeChange:) forControlEvents:UIControlEventValueChanged];

volumeStepper.minimumValue = 0;

volumeStepper.maximumValue = 3;

volumeStepper.stepValue = 1;

//设置控制器背景图片

volumeStepper.tintColor = [UIColor lightGrayColor];

[self.view addSubview:volumeStepper];

#endif

view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 300, 270)];

view.center = CGPointMake(WIDTH/2, HEIGHT/3);

view.hidden = YES;

view.alpha = 0.6;

[self.view addSubview:view];

myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, view.bounds.size.width, view.bounds.size.height) style:UITableViewStylePlain];

[view addSubview:myTableView];

myTableView.dataSource = self;

myTableView.delegate = self;

[self loadDataModel];

}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CELL"];

if (!cell) {

cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"CELL"];

cell.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];

}

//cell.backgroundView = nil;

cell.contentView.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];

[myTableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];

cell.opaque = NO;

cell.textLabel.backgroundColor = [UIColor colorWithRed:85.88 green:71.78 blue:60.74 alpha:0.6];

cell.textLabel.text = dataArray[indexPath.row];

return cell;

}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

return dataArray.count;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

NSString *filename = [[NSBundle mainBundle] pathForResource:songs[indexPath.row] ofType:@"mp3"];

NSURL *fileUrl = [NSURL fileURLWithPath:filename];

[self updateUI:fileUrl];

MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];

MyPlayer.volume = 1;

MyPlayer.delegate = self;

[MyPlayer prepareToPlay];

[MyPlayer play];

view.hidden = YES;

}

-(void)loadDataModel{

if (!dataArray) {

dataArray = [NSMutableArray array];

}

dataArray = [NSMutableArray arrayWithObjects:@"月半小夜曲",@"后会无期",@"静静看着你",@"李白",@"喜欢你",@"Taylor Swift - Love Story (International Radio Mi", nil];

}

-(void)volumeChange:(UIStepper *)sender{

MyPlayer.volume = sender.value;

}

//进度条改变的回调方法

-(void)progressChange{

_playProgressView.progress = MyPlayer.currentTime/MyPlayer.duration;

[UIView animateWithDuration:8 animations:^{

_coverImageView.transform = CGAffineTransformRotate(_coverImageView.transform, M_PI_4/5);

}];

}

- (IBAction)volumeIncreaseButtonClicked:(UIButton *)sender {

MyPlayer.volume += 1;

if (MyPlayer.volume>4) {

MyPlayer.volume = 4;

}

}

- (IBAction)volumeDecreaseButtonClicked:(UIButton *)sender {

MyPlayer.volume -= 1;

if (MyPlayer.volume<0) {

MyPlayer.volume = 0;

}

}

//播放列表

- (IBAction)MusicListButtonClicked:(UIButton *)sender {

view.hidden = !view.hidden;

}

//播放结束

-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{

index1 = arc4random()%6;

if (index1!=myindex) {

myindex = index1;

}

NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];

NSURL *fileUrl = [NSURL fileURLWithPath:filename];

[self updateUI:fileUrl];

MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];

MyPlayer.volume = 1;

MyPlayer.delegate = self;

[MyPlayer prepareToPlay];

[MyPlayer play];

}

//刷新界面 拿到歌的信息 刷新界面

-(void)updateUI:(NSURL *)fileUrl{

//代表和文件相关的数据

AVURLAsset *assset = [[AVURLAsset alloc]initWithURL:fileUrl options:nil];

//[assset availableMetadataFormats];//元数据的格式

NSArray *metaDataItems =[assset metadataForFormat:[[assset availableMetadataFormats] firstObject]];

for (AVMetadataItem *item in metaDataItems) {

if ([item.commonKey isEqualToString:@"artist"]) {

_artistLabel.text = [item.value description];

}

else if ([item.commonKey isEqualToString:@"title"]){

_titleLabel.text = [item.value description];

}

else if ([item.commonKey isEqualToString:@"albumName"]){

_albumLabel.text = [item.value description];

}

else if ([item.commonKey isEqualToString:@"artwork"]){

_coverImageView.image = [UIImage imageWithData:(id)item.value];

}

}

}

- (IBAction)buttonClicked:(UIButton *)sender {

if(MyPlayer.isPlaying){

timer.fireDate = [NSDate distantFuture];

[MyPlayer pause];

//[sender setTitle:@"播放" forState:UIControlStateNormal]  ;

}

else {

timer.fireDate = [NSDate distantPast];

[MyPlayer play];

//[sender setTitle:@"暂停" forState:UIControlStateNormal];

}

}

- (IBAction)prevButtonClicked:(UIButton *)sender {

timer.fireDate = [NSDate distantPast];

myindex --;

if (myindex==0) {

myindex = 5;

}

NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];

NSURL *fileUrl = [NSURL fileURLWithPath:filename];

[self updateUI:fileUrl];

MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];

MyPlayer.volume = 1;

MyPlayer.delegate = self;

[MyPlayer prepareToPlay];

[MyPlayer play];

}

- (IBAction)nextButtonClicked:(UIButton *)sender {

timer.fireDate = [NSDate distantPast];

myindex++;

if (myindex>5) {

myindex = 0;

}

NSString *filename = [[NSBundle mainBundle] pathForResource:songs[myindex] ofType:@"mp3"];

NSURL *fileUrl = [NSURL fileURLWithPath:filename];

[self updateUI:fileUrl];

MyPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:fileUrl error:nil];

MyPlayer.volume = 1;

MyPlayer.delegate = self;

[MyPlayer prepareToPlay];

[MyPlayer play];

}

- (IBAction)stopButtonClicked:(UIButton *)sender {

timer.fireDate = [NSDate distantFuture];

[MyPlayer stop];

MyPlayer.currentTime = 0;

_playProgressView.progress = 0;

}

@end

文／hither（简书作者）

原文链接：//www.greatytc.com/p/c59b29aaa500

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