音乐播放器

在ViewController.m中

#import "ViewController.h"//导入音频播放器的框架#import <AVFoundation/AVFoundation.h>#import "SecondViewController.h"@interface ViewController ()<AVAudioPlayerDelegate>@property (weak, nonatomic) IBOutlet UILabel *nameLabel;@property (weak, nonatomic) IBOutlet UILabel *timeLabel;@property (weak, nonatomic) IBOutlet UISlider *processSlider;@property (weak, nonatomic) IBOutlet UISlider *volumeSlider;//声明音频播放器对象的属性，便于以下代码的操作@property(retain)AVAudioPlayer * player;//音乐的名字@property(retain)NSString * musicName;@property(retain)SecondViewController * VC;@end@implementation ViewController-(void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:YES];    if (_musicName.length==0) {        _nameLabel.text=@"蓝莲花";    }}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    //获取音频文件的相对路径    NSString * path=[[NSBundle mainBundle]pathForResource:@"蓝莲花" ofType:@"mp3"];    //把相对路径转成url    NSURL * url=[NSURL fileURLWithPath:path];    //初始化音乐播放器    _player =[[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];    //    _player.delegate=self;    //加载到内存准备播放    [_player prepareToPlay];     [[NSNotificationCenter defaultCenter ]addObserver:self selector:@selector(changeMusic:) name:@"music" object:nil];}//播放按钮- (IBAction)playAction:(UIButton *)sender {    [_player play];    NSTimer * timer=[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updataUI) userInfo:nil repeats:YES];}-(void)updataUI{   // _player.duration  //总时长  //  _player.currentTime  //播放了的时长    //设置进度条的值    _processSlider.value=_player.currentTime/_player.duration;    //总时长的分    int allmm=_player.duration/60;    //总时长的秒数    int allss=(int)_player.duration%60;    //当前时长的分    int cuMM=_player.currentTime/60;    //当前时长的秒    int cuSS=(int)_player.currentTime%60;    _timeLabel.text=[NSString stringWithFormat:@"%.2d:%.2d/%.2d:%.2d",cuMM,cuSS,allmm,allss];}//音乐播放完成-(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{    NSLog(@"播放完成");}//音乐播放被中断-(void)audioPlayerBeginInterruption:(AVAudioPlayer *)player{    NSLog(@"音乐被突然中断，比如系统电话来了");}//中断已结束-(void)audioPlayerEndInterruption:(AVAudioPlayer *)player withOptions:(NSUInteger)flags{    NSLog(@"中断已结束，可以正常播放音乐了");    [self playAction:nil];}-(void)changeMusic:(NSNotification *)notification{    _musicName=notification.object;    _nameLabel.text=_musicName;    //获取音频文件的路劲    NSString*path=[[NSBundle mainBundle]pathForResource:_musicName ofType:@"mp3"];    //把相对路劲转化为url    NSURL*url=[NSURL fileURLWithPath:path];    if (_player) {        _player=nil;    }    //设置代理    _player.delegate=self;    _player=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];    //加载到内存准备播放    [_player prepareToPlay];    [self playAction:nil];}//停止播放- (IBAction)stopAction:(UIButton *)sender {    [_player stop];}//改变进度- (IBAction)processAction:(UISlider *)sender {    //根据Slider的值直接改变进度，这样会出现卡顿的现象    //_player.currentTime=sender.value*_player.duration;    //这样设置就不会出现卡顿    [_player stop];    _player.currentTime=sender.value * _player.duration;}- (IBAction)touchLeaveAction:(UISlider *)sender {    [self playAction:nil];}//播放音量- (IBAction)volmeAction:(UISlider *)sender {    [_player setVolume:sender.value*100];}- (IBAction)musicListAction:(UIButton *)sender {    _VC=[[SecondViewController alloc]init];    [self presentViewController:_VC animated:YES completion:nil];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

在SecondViewController.m中

#import "SecondViewController.h"@interface SecondViewController ()<UITableViewDelegate,UITableViewDataSource>@property(retain)NSMutableArray * dataSource;@end@implementation SecondViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view from its nib.    //获取文件的相对路径    NSString*path=[[NSBundle mainBundle]pathForResource:@"musicList" ofType:@"plist"];    //读取plist文件的内容    NSArray*arr=[NSArray arrayWithContentsOfFile:path];    _dataSource=[NSMutableArray arrayWithArray:arr];}-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return _dataSource.count;}-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString*cellID=@"cell";    UITableViewCell*cell=[tableView dequeueReusableCellWithIdentifier:cellID];    if (cell==nil) {        cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];    }    cell.textLabel.text=_dataSource[indexPath.row];    return cell;}-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    [tableView deselectRowAtIndexPath:indexPath animated:YES];    [self dismissViewControllerAnimated:YES completion:nil];    [[NSNotificationCenter defaultCenter]postNotificationName:@"music" object:_dataSource[indexPath.row]];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end