//

//  ViewController.m

//  AVFoundation音乐播放

//

//  Created by dc008 on 15/12/28.

//  Copyright © 2015年 lin. All rights reserved.

//

#import "ViewController.h"

//引入音乐播放框架

#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVAudioPlayerDelegate>

//{

//    AVAudioPlayer *audioPlayer;

//}

{

UIButton *_startButton,*_upButton,*_downButton;

UIProgressView *_progressView;

UILabel *_nameLabel,*_singerLabel,*_beginLabel,*_endLabel;

NSArray *_nameArray,*_singerArray,*_imageArray;

UIImageView *_imageView;

NSTimer *_timer;

int _i;//数组下标

BOOL _choose;//判断暂停

}

@property (nonatomic,strong)AVAudioPlayer *audioPlayer;//音乐播放器

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

_choose = YES;

//    [self audioPlayer];

[self layoutUI];

[self.audioPlayer play];

_i = 0;

//    [_audioPlayer play];

//播放 play

//暂停 pause

//停止 stop

//当前播放时长 currentTime

//音乐时长 duration

//音量 volume

//是否允许改变播放速率 enableRate

//播放速率 rate （范围0.5-2.0）

//循环播放次数 numberOfLoops

}

- (void)layoutUI{

_upButton = [[UIButton alloc]initWithFrame:CGRectMake(70, 600, 50, 40)];

[_upButton setTitle:@"⏪" forState:UIControlStateNormal];

[_upButton addTarget:self action:@selector(up) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_upButton];

_startButton = [[UIButton alloc]initWithFrame:CGRectMake(170, 600, 50, 40)];

[_startButton setTitle:@"▶️" forState:UIControlStateNormal];

[_startButton addTarget:self action:@selector(suspend) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_startButton];

_downButton= [[UIButton alloc]initWithFrame:CGRectMake(270, 600, 50, 40)];

[_downButton setTitle:@"⏩" forState:UIControlStateNormal];

[_downButton addTarget:self action:@selector(down) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:_downButton];

_timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(turnAround) userInfo:nil repeats:YES];

_progressView = [[UIProgressView alloc]initWithFrame:CGRectMake(85, 590, 220, 30)];

[self.view addSubview:_progressView];

_nameArray = [NSArray array];

_nameArray = @[@"稻香",@"失恋",@"冰雨(live版)",@"七里香(live版)"];

_singerArray = [NSArray array];

_singerArray = @[@"周杰伦",@"草蜢",@"刘德华",@"周杰伦"];

_imageArray = [NSArray array];

_imageArray = @[@"0",@"1",@"2",@"3"];

_beginLabel = [[UILabel alloc]initWithFrame:CGRectMake(60, 500, 60, 30)];

[self.view addSubview:_beginLabel];

_endLabel = [[UILabel alloc]initWithFrame:CGRectMake(280, 500, 60, 30)];

[self.view addSubview:_endLabel];

_nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 60, 375, 20)];

_nameLabel.text = _nameArray[_i];

_nameLabel.textAlignment = NSTextAlignmentCenter;

[self.view addSubview:_nameLabel];

_singerLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 80, 375, 20)];

_singerLabel.text = [NSString stringWithFormat:@"歌手:%@",_singerArray[_i]];

_singerLabel.textAlignment = NSTextAlignmentCenter;

[self.view addSubview:_singerLabel];

_imageView = [[UIImageView alloc]initWithFrame:CGRectMake(40, 170, 300, 300)];

_imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",_imageArray[_i]]];

_imageView.layer.cornerRadius = 150;

_imageView.layer.masksToBounds = YES;

//    _imageView.backgroundColor = [UIColor whiteColor];

[self.view addSubview:_imageView];

self.view.backgroundColor = [UIColor grayColor];

}

- (void)turnAround{

//CGAffineTransformMakeRotation这个方法是根据原始图形的transform来转变的

//CGAffineTransformRotate是根据前一次的状态来改变

[UIView beginAnimations:nil context:nil];

[UIView setAnimationDuration:2.0f];

_imageView.transform = CGAffineTransformRotate(_imageView.transform, M_PI_4);

[UIView commitAnimations];

_progressView.progress = (float)_audioPlayer.currentTime/(float)_audioPlayer.duration;

_beginLabel.text = [NSString stringWithFormat:@"%.2f",_audioPlayer.currentTime];

}

- (void)up{

NSLog(@"上一首");

_i = _i-1;

if (_i == -1) {

_i = 3;

}

_nameLabel.text = _nameArray[_i];

_singerLabel.text = [NSString stringWithFormat:@"歌手:%@",_singerArray[_i]];

_audioPlayer = nil;

_imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",_imageArray[_i]]];

[self.audioPlayer play];

}

- (void)suspend{

if (_choose) {

[self.audioPlayer pause];

_choose = NO;

_timer.fireDate = [NSDate distantFuture];//暂停

NSLog(@"暂停");

}

else{

[self.audioPlayer play];

_choose = YES;

_timer.fireDate = [NSDate distantPast];//开始

NSLog(@"开始");

}

}

- (void)down{

NSLog(@"下一首");

_i = _i+1;

if (_i == 4) {

_i = 0;

}

_nameLabel.text = _nameArray[_i];

_singerLabel.text = [NSString stringWithFormat:@"歌手:%@",_singerArray[_i]];

_audioPlayer = nil;

_imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",_imageArray[_i]]];

[self.audioPlayer play];

}

#pragma mark audioPlayer属性的get方法

- (AVAudioPlayer *)audioPlayer{

//    NSLog(@"get方法被调用");

if (!_audioPlayer) {

NSLog(@"播放器准备启动,开始实例化");

//1.获取音乐文件路径

NSString *urlStr = [[NSBundle mainBundle]pathForResource:[NSString stringWithFormat:@"%@",_nameArray[_i]] ofType:@"mp3"];

//获取本地音乐url,⚠️只能播放本地

NSURL *url = [NSURL fileURLWithPath:urlStr];

//2.初始化播放器

NSError *error;

_audioPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:url error:&error];

//设置播放器属性

_audioPlayer.numberOfLoops = 0;//0为不循环,负数为无线循环

_audioPlayer.volume = 1;//音量范围0-1

NSLog(@"音乐时长:%f",_audioPlayer.duration);

[_audioPlayer prepareToPlay];//加载音频文件到缓存

_audioPlayer.delegate = self;

_endLabel.text = [NSString stringWithFormat:@"%.2f",_audioPlayer.duration];

}

return _audioPlayer;

}

#pragma mark 播放器代理方法-播放结束时

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

NSLog(@"音乐播放完成");

_i = _i+1;

if (_i == 4) {

_i = 0;

}

_nameLabel.text = _nameArray[_i];

_singerLabel.text = [NSString stringWithFormat:@"歌手:%@",_singerArray[_i]];

_audioPlayer = nil;

_imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@.jpg",_imageArray[_i]]];

[self.audioPlayer play];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end