iOS开发拓展篇—音频处理（音乐播放器4）

  1 //
  2 //  YYPlayingViewController.m
  3 //  20-音频处理（音乐播放器1）
  4 //
  5 //  Created by apple on 14-8-13.
  6 //  Copyright (c) 2014年 yangyong. All rights reserved.
  7 //
  8 
  9 #import "YYPlayingViewController.h"
 10 #import "YYMusicTool.h"
 11 #import "YYMusicModel.h"
 12 #import "YYAudioTool.h"
 13 
 14 @interface YYPlayingViewController ()
 15 //进度条
 16 @property (weak, nonatomic) IBOutlet UIView *progressView;
 17 //滑块
 18 @property (weak, nonatomic) IBOutlet UIButton *slider;
 19 @property (weak, nonatomic) IBOutlet UIImageView *iconView;
 20 @property (weak, nonatomic) IBOutlet UILabel *songLabel;
 21 @property (weak, nonatomic) IBOutlet UILabel *singerLabel;
 22 //当前播放的音乐的时长
 23 @property (weak, nonatomic) IBOutlet UILabel *durationLabel;
 24 //正在播放的音乐
 25 @property(nonatomic,strong)YYMusicModel *playingMusic;
 26 //音乐播放器对象
 27 @property(nonatomic,strong)AVAudioPlayer *player;
 28 //定时器
 29 @property(nonatomic,strong)NSTimer *CurrentTimeTimer;
 30 - (IBAction)exit;
 31 - (IBAction)tapProgressBg:(UITapGestureRecognizer *)sender;
 32 - (IBAction)panSlider:(UIPanGestureRecognizer *)sender;
 33 
 34 @end
 35 
 36 @implementation YYPlayingViewController
 37 #pragma mark-公共方法
 38 -(void)show
 39 {
 40     //1.禁用整个app的点击事件
 41     UIWindow *window=[UIApplication sharedApplication].keyWindow;
 42     window.userInteractionEnabled=NO;
 43     
 44     //2.添加播放界面
 45     //设置View的大小为覆盖整个窗口
 46     self.view.frame=window.bounds;
 47     //设置view显示
 48     self.view.hidden=NO;
 49     //把View添加到窗口上
 50     [window addSubview:self.view];
 51     
 52     //3.检测是否换了歌曲
 53     if (self.playingMusic!=[YYMusicTool playingMusic]) {
 54         [self RresetPlayingMusic];
 55     }
 56     
 57     //4.使用动画让View显示
 58     self.view.y=self.view.height;
 59     [UIView animateWithDuration:0.25 animations:^{
 60         self.view.y=0;
 61     } completion:^(BOOL finished) {
 62         
 63         //设置音乐数据
 64         [self starPlayingMusic];
 65         window.userInteractionEnabled=YES;
 66     }];
 67 }
 68 
 69 
 70 #pragma mark-私有方法
 71 //重置正在播放的音乐
 72 -(void)RresetPlayingMusic
 73 {
 74     //1.重置界面数据
 75     self.iconView.image=[UIImage imageNamed:@"play_cover_pic_bg"];
 76     self.songLabel.text=nil;
 77     self.singerLabel.text=nil;
 78     
 79     //2.停止播放
 80     [YYAudioTool stopMusic:self.playingMusic.filename];
 81     //把播放器进行清空
 82     self.player=nil;
 83     
 84     //3.停止定时器
 85     [self removeCurrentTime];
 86 }
 87 //开始播放音乐数据
 88 -(void)starPlayingMusic
 89 {
 90     //1.设置界面数据
 91     
 92     //如果当前播放的音乐就是传入的音乐，那么就直接返回
 93     if (self.playingMusic==[YYMusicTool playingMusic])
 94     {
 95         //把定时器加进去
 96         [self addCurrentTimeTimer];
 97         return;
 98     }
 99     //存取音乐
100     self.playingMusic=[YYMusicTool playingMusic];
101     self.iconView.image=[UIImage imageNamed:self.playingMusic.icon];
102     self.songLabel.text=self.playingMusic.name;
103     self.singerLabel.text=self.playingMusic.singer;
104     
105     //2.开始播放
106     self.player = [YYAudioTool playMusic:self.playingMusic.filename];
107     
108     //3.设置时长
109     //self.player.duration;  播放器正在播放的音乐文件的时间长度
110     self.durationLabel.text=[self strWithTime:self.player.duration];
111     
112     //4.添加定时器
113     [self addCurrentTimeTimer];
114     
115 }
116 
117 /**
118  *把时间长度-->时间字符串
119  */
120 -(NSString *)strWithTime:(NSTimeInterval)time
121 {
122     int minute=time / 60;
123     int second=(int)time % 60;
124     return [NSString stringWithFormat:@"%d:%d",minute,second];
125 }
126 
127 #pragma mark - 定时器控制
128 /**
129  *  添加一个定时器
130  */
131 -(void)addCurrentTimeTimer
132 {
133     //提前先调用一次进度更新，以保证定时器的工作时及时的
134     [self updateCurrentTime];
135     
136     //创建一个定时器，每一秒钟调用一次
137     self.CurrentTimeTimer=[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateCurrentTime) userInfo:nil repeats:YES];
138     //把定时器加入到运行时中
139     [[NSRunLoop mainRunLoop]addTimer:self.CurrentTimeTimer forMode:NSRunLoopCommonModes];
140 }
141 /**
142  *移除一个定时器
143  */
144 -(void)removeCurrentTime
145 {
146     [self.CurrentTimeTimer invalidate];
147     
148     //把定时器清空
149     self.CurrentTimeTimer=nil;
150 }
151 
152 /**
153  *  更新播放进度
154  */
155 -(void)updateCurrentTime
156 {
157     //1.计算进度值
158     double progress=self.player.currentTime/self.player.duration;
159     
160     //2.计算滑块的x值
161     // 滑块的最大的x值
162     CGFloat sliderMaxX=self.view.width-self.slider.width;
163     self.slider.x=sliderMaxX*progress;
164     //设置滑块上的当前播放时间
165     [self.slider setTitle:[self strWithTime:self.player.currentTime] forState:UIControlStateNormal];
166     
167     //3.设置进度条的宽度
168     self.progressView.width=self.slider.center.x;
169     
170 }
171 
172 #pragma mark-内部的按钮监听方法
173 //返回按钮
174 - (IBAction)exit {
175     
176     //0.移除定时器
177     [self  removeCurrentTime];
178     //1.禁用整个app的点击事件
179     UIWindow *window=[UIApplication sharedApplication].keyWindow;
180     window.userInteractionEnabled=NO;
181     
182     //2.动画隐藏View
183     [UIView animateWithDuration:0.25 animations:^{
184         self.view.y=window.height;
185     } completion:^(BOOL finished) {
186         window.userInteractionEnabled=YES;
187         //设置view隐藏能够节省一些性能
188         self.view.hidden=YES;
189     }];
190 }
191 
192 /**
193  *点击了进度条
194  */
195 - (IBAction)tapProgressBg:(UITapGestureRecognizer *)sender {
196     //获取当前单击的点
197     CGPoint point=[sender locationInView:sender.view];
198     //切换歌曲的当前播放时间
199     self.player.currentTime=(point.x/sender.view.width)*self.player.duration;
200     //更新播放进度
201     [self updateCurrentTime];
202 }
203 
204 - (IBAction)panSlider:(UIPanGestureRecognizer *)sender {
205     
206     //1.获得挪动的距离
207     CGPoint t=[sender translationInView:sender.view];
208     //把挪动清零
209     [sender setTranslation:CGPointZero inView:sender.view];
210     
211     //2.控制滑块和进度条的frame
212     self.slider.x+=t.x;
213     //设置进度条的宽度
214     self.progressView.width=self.slider.center.x;
215     
216     //3.设置时间值
217     CGFloat sliderMaxX=self.view.width-self.slider.width;
218     double progress=self.slider.x/sliderMaxX;
219     //当前的时间值=音乐的时长*当前的进度值
220     NSTimeInterval time=self.player.duration*progress;
221     [self .slider setTitle:[self strWithTime:time] forState:UIControlStateNormal];
222     
223     //4.如果开始拖动，那么就停止定时器
224     if (sender.state==UIGestureRecognizerStateBegan) {
225         //停止定时器
226         [self removeCurrentTime];
227     }else if(sender.state==UIGestureRecognizerStateEnded)
228     {
229         //设置播放器播放的时间
230         self.player.currentTime=time;
231         //开启定时器
232         [self addCurrentTimeTimer];
233     }
234 }
235 @end

 1 /**
 2  *播放音乐
 3  */
 4 +(AVAudioPlayer *)playMusic:(NSString *)filename
 5 {
 6     if (!filename) return nil;//如果没有传入文件名，那么直接返回
 7     //1.取出对应的播放器
 8     AVAudioPlayer *player=[self musicPlayers][filename];
 9     
10     //2.如果播放器没有创建，那么就进行初始化
11     if (!player) {
12         //2.1音频文件的URL
13         NSURL *url=[[NSBundle mainBundle]URLForResource:filename withExtension:nil];
14         if (!url) return nil;//如果url为空，那么直接返回
15         
16         //2.2创建播放器
17         player=[[AVAudioPlayer alloc]initWithContentsOfURL:url error:nil];
18         
19         //2.3缓冲
20         if (![player prepareToPlay]) return nil;//如果缓冲失败，那么就直接返回
21         
22         //2.4存入字典
23         [self musicPlayers][filename]=player;
24     }
25     
26     //3.播放
27     if (![player isPlaying]) {
28         //如果当前没处于播放状态，那么就播放
29          [player play];
30     }
31 
32     return player;//正在播放，那么就返回YES
33 }

1 /**
2  *把时间长度-->时间字符串
3  */
4 -(NSString *)strWithTime:(NSTimeInterval)time
5 {
6     int minute=time / 60;
7     int second=(int)time % 60;
8     return [NSString stringWithFormat:@"%d:%d",minute,second];
9 }

 1 /**
 2  *移除一个定时器
 3  */
 4 -(void)removeCurrentTime
 5 {
 6     [self.CurrentTimeTimer invalidate];
 7     
 8     //把定时器清空
 9     self.CurrentTimeTimer=nil;
10 }

 1 /**
 2  *点击了进度条
 3  */
 4 - (IBAction)tapProgressBg:(UITapGestureRecognizer *)sender {
 5     //获取当前单击的点
 6     CGPoint point=[sender locationInView:sender.view];
 7     //切换歌曲的当前播放时间
 8     self.player.currentTime=(point.x/sender.view.width)*self.player.duration;
 9     //更新播放进度
10     [self updateCurrentTime];
11 }

 1 /**
 2  *拖动滑块
 3  */
 4 - (IBAction)panSlider:(UIPanGestureRecognizer *)sender {
 5     
 6     //1.获得挪动的距离
 7     CGPoint t=[sender translationInView:sender.view];
 8     //把挪动清零
 9     [sender setTranslation:CGPointZero inView:sender.view];
10     
11     //2.控制滑块和进度条的frame
12     self.slider.x+=t.x;
13     //设置进度条的宽度
14     self.progressView.width=self.slider.center.x;
15     
16     //3.设置时间值
17     CGFloat sliderMaxX=self.view.width-self.slider.width;
18     double progress=self.slider.x/sliderMaxX;
19     //当前的时间值=音乐的时长*当前的进度值
20     NSTimeInterval time=self.player.duration*progress;
21     [self .slider setTitle:[self strWithTime:time] forState:UIControlStateNormal];
22     
23     //4.如果开始拖动，那么就停止定时器
24     if (sender.state==UIGestureRecognizerStateBegan) {
25         //停止定时器
26         [self removeCurrentTime];
27     }else if(sender.state==UIGestureRecognizerStateEnded)
28     {
29         //设置播放器播放的时间
30         self.player.currentTime=time;
31         //开启定时器
32         [self addCurrentTimeTimer];
33     }
34 }