AVAudio 2

歌曲列表页面：#import "ViewController.h"#import "SecondView.h"@interface ViewController ()    <UITableViewDataSource,UITableViewDelegate>  //添加数据源和代理协议{    NSArray *list;//歌曲列表数组       SecondView *second; //将second的变为全局，为了使当第二个页面退出(销毁)时，仍然能够占有内存，歌曲能继续播放}@end@implementation ViewController            - (void)viewDidLoad {    [super viewDidLoad];    list = @[@"阿兰 - 遥远的重逢",@"曲婉婷 - 我为你歌唱",@"闹够了没有",@"陈奕迅 - k歌之王",@"李代沫 - 原来爱情没有刚刚好",@"胡歌、白冰 - 美丽的神话",@"周杰伦 - 明明就",@"神话·情话",@"She Looks So Perfect",@"Justin Bieber - Mistletoe",@"丁当 - 甩开",@"丁当 - 白头吟",@"Demi  Lovato - Let  It  Go",@"五月天 - 伤心的人别听慢歌",@"魏晨 - 我为自己代言",@"陈翔 - 烟火",@"张杰 - 他不懂",@"张杰 - 剑心",@"孙燕姿 - 天使的指纹"];        self.view.backgroundColor = [UIColor whiteColor];       UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 30, 320, 460) style:UITableViewStylePlain];  //创建对象，尺寸整屏设定为 initWithFram:self.view.bounds     tableView.dataSource = self;    //设置数据源，将tableView的数据源定义在当前的类    tableView.delegate = self;  //将播放器代理协议定义在当前类    [self.view addSubview:tableView];}#pragma mark - UITableViewDataSource    //标记，方便查看 //<UITableViewDataSource>协议里的方法，@required，必须实现的- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return list.count;//返回行数，行数为歌词列表的数目}// <UITableViewDataSource>协议里的方法，@required，必须实现的- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{//需注意indexPath 是这个方法里的参数，是局部变量，指索引路径    //使用重用标示获取已有的Cell       UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];    if (cell == nil) {        //使用一个重用标示创建一个Cell        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"]; //cell代表每一行的空间     }    cell.textLabel.text = [NSString stringWithFormat:@"%d.%@",indexPath.row+1,list[indexPath.row]]; //在cell上显示文字    return cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{//UITableViewDelegate>协议里的方法，点击行数后会执行的动作    second = [[SecondView alloc] initWithNibName:nil bundle:nil];    //创建第二个页面    second.list = list; //把第一页的歌曲列表传给第二页     [second myrow:indexPath.row];//将点击的行的内容显示在第二个页面    [self presentViewController:second animated:YES completion:nil];//显示第二个界面}@end

播放页面：#import "ViewController.h"#import <AVFoundation/AVFoundation.h>@interface SecondView ()  <AVAudioPlayerDelegate>{    int _myrow;//定义成员变量 行    AVAudioPlayer *player;    NSTimer *timer;}@property (nonatomic,strong) IBOutlet UISlider *slider;  //创建滑动条的属性，指针对象@end- (void)play{    NSString *path = [[NSBundle mainBundle] pathForResource:_list[_myrow] ofType:@"mp3"] ;    self.lable.text = [NSString stringWithFormat:@"%@",_list[_myrow]];    //data不会区分文件的扩展名，url会识别扩展名//    NSData *data = [NSData dataWithContentsOfFile:path];//    player = [[AVAudioPlayer alloc] initWithData:data error:nil];        NSURL *url = [NSURL fileURLWithPath:path];    NSData *data = [NSData dataWithContentsOfURL:url];    NSError *err;    player = [[AVAudioPlayer alloc] initWithData:data error:&err];  //读出错误，把错误传给err    NSLog(@"err:%@",err);  //输出错误        player.delegate = self; //代理协议    [player prepareToPlay];    [player play];        timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(contrlProgress) userInfo:nil repeats:YES];   //定时器，控制滑动条的自动移动}- (void)myrow:(int)row{    _myrow = row;}- (void)creatButtons:(CGRect)frame setImage:(NSString *)image action:(SEL)action type:(UIButtonType)type   //按钮封装{   //需将参数写进来    UIButton *Btn = [UIButton buttonWithType:UIButtonTypeCustom];    Btn.frame = frame;    [Btn setImage:[UIImage imageNamed:image] forState:UIControlStateNormal];    [Btn addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:Btn];}- (void)viewDidLoad{    [super viewDidLoad];    UIImageView *bgImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 20, 320, 470)];    bgImageView.image = [UIImage imageNamed:@"01.jpg"];    [self.view addSubview:bgImageView];        [self creatButtons:CGRectMake(15, 35, 45, 45) setImage:@"7.png" action:@selector(backClick:) type:UIButtonTypeSystem];    [self creatButtons:CGRectMake(175, 410, 40, 40) setImage:@"6.png" action:@selector(playClick:) type:UIButtonTypeSystem];    [self creatButtons:CGRectMake(40, 410, 40, 40) setImage:@"5.png" action:@selector(foreClick:) type:UIButtonTypeSystem];    [self creatButtons:CGRectMake(240, 410, 40, 40) setImage:@"4.png" action:@selector(nextClick:) type:UIButtonTypeSystem];    [self creatButtons:CGRectMake(110, 410, 40, 40) setImage:@"9.png" action:@selector(stopClick:) type:UIButtonTypeSystem];        self.view.backgroundColor = [UIColor whiteColor];    self.lable = [[UILabel alloc] initWithFrame:CGRectMake(80, 35, 200, 50)];      self.lable.textColor = [UIColor whiteColor];    [self.view addSubview:self.lable];        self.slider = [[UISlider alloc] initWithFrame:CGRectMake(20, 360, 280, 30)];  //给滑动条赋值，属性只是创建了一个对象，错误写法：UISlider *slider = [[UISlider alloc] initWithFrame:...];    [self.slider addTarget:self action:@selector(moveSlider:) forControlEvents:UIControlEventValueChanged]; //移动滑动条的值    [self.view addSubview:self.slider];       [self play];   }- (void)contrlProgress{    self.slider.value = player.currentTime / player.duration;}- (void)moveSlider:(UISlider *)sender{    player.currentTime = sender.value * player.duration;}- (void)stopClick:(UIButton *)sender// 停止，进度条置0，歌曲播放时间置0{    self.slider.value = 0;      player.currentTime = 0;    [player stop];}- (void)backClick:(UIButton *)sender{#if 0    ViewController *viewcon = [[ViewController alloc] initWithNibName:nil bundle:nil];    [self presentViewController:viewcon animated:YES completion:nil];  //不需要重新创建对象，只需返回前一个页面#endif       [timer invalidate];//结束定时器    [self dismissViewControllerAnimated:YES completion:nil];//解散当前视图，就是返回前一个视图}- (void)playClick:(UIButton *)sender{    if (player.isPlaying)    {        [player pause];    }    else    {        [player play];    }}- (void)foreClick:(UIButton *)sender{    if (_myrow < 1)    {        _myrow = _list.count;    }    _myrow -- ;    [self play];   }- (void)nextClick:(UIButton *)sender{    _myrow ++ ;    if (_myrow == _list.count)    {        _myrow = 0;    }    [self play];}- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{    _myrow ++;    if (_myrow == _list.count)     {        _myrow = 0;    }    [self play];}@end