IM模块-声音麦克风监控波动

参考资料：

[简书地址](http://www.jianshu.com/users/23d0ae412e19/latest_articles)

#import <UIKit/UIKit.h>@interface RecordingHub : UIView@property (nonatomic,assign) float peakPower;// 按下
- (void)recordButtonTouchDown;// 移动到外面
- (void)recordButtonTouchUpOutside;@end

#import "RecordingHub.h"@interface RecordingHub()@property (nonatomic,strong) UIView *bgView;
@property (nonatomic,strong) UIImageView *recordVoiceView;
@property (nonatomic,strong) UILabel *textLabel; // 显示文字
@property (nonatomic,strong) NSTimer *timer;@end/***  Description: 麦克风弹出窗口*/
@implementation RecordingHub- (instancetype)initWithFrame:(CGRect)frame{self = [super initWithFrame:frame];if (self) {[self setUpUI];}return self;
}- (void)setUpUI{// 背景_bgView = [[UIView alloc]initWithFrame:self.bounds];_bgView.backgroundColor = [UIColor grayColor];_bgView.layer.cornerRadius = 6;_bgView.layer.masksToBounds= true;_bgView.alpha = 0.5;[self addSubview:_bgView];// 麦克风_recordVoiceView = [[UIImageView alloc]init];_recordVoiceView.frame = CGRectMake(10, 0, self.bounds.size.width - 20, self.bounds.size.height - 10);_recordVoiceView.image = [UIImage imageNamed:@"VoiceSearchFeedback001"];[self addSubview:_recordVoiceView];// 文字_textLabel = [[UILabel alloc]init];_textLabel.frame = CGRectMake(5,self.bounds.size.height - 30,self.bounds.size.width - 10,25);_textLabel.textAlignment = NSTextAlignmentCenter;_textLabel.textColor = [UIColor whiteColor];_textLabel.backgroundColor = [UIColor clearColor];_textLabel.text = @"请说话.....";_textLabel.font = [UIFont systemFontOfSize:12];_textLabel.layer.cornerRadius = 6;_textLabel.layer.masksToBounds = YES;_textLabel.layer.borderColor = [[UIColor redColor] colorWithAlphaComponent:0.5].CGColor;[self addSubview:_textLabel];
}// 按下
- (void)recordButtonTouchDown{_textLabel.text = @"松开发送";_textLabel.backgroundColor = [UIColor clearColor];_timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(updateVoiceImage) userInfo:nil repeats:YES];[[UIApplication sharedApplication].keyWindow addSubview:self];
}// 移动到外面
- (void)recordButtonTouchUpOutside{[_timer invalidate];[self removeFromSuperview];
}// 改变图片的状态变化
- (void)updateVoiceImage{_recordVoiceView.image = [UIImage imageNamed:@"VoiceSearchFeedback001@2x"];float number = fabs(_peakPower);NSLog(@"number is --->%f",number);if (10< number  && number< 20) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback001@2x"]];}else if (20<number && number<=30) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback002@2x"]];}else if (30<number && number<=40) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback003@2x"]];}else if (40<number && number<=50) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback004@2x"]];}else if (50<number && number<=60) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback005@2x"]];}else if (60<number && number<=70) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback006@2x"]];}else if (70<number && number<=80) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback007@2x"]];}else if (80<number && number<=90) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback008@2x"]];}else if (90<number && number<=100) {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback009@2x"]];}else {[_recordVoiceView setImage:[UIImage imageNamed:@"VoiceSearchFeedback020@2x"]];}
}
@end

#import "ViewController.h"
#import "RecordingHub.h"
#import <AVFoundation/AVFoundation.h>@interface ViewController ()@property (weak, nonatomic) IBOutlet UIButton *voiderBtn;
@property (nonatomic,strong) RecordingHub *hud;@property (nonatomic,strong) AVAudioRecorder  *recorder;
@property (nonatomic,strong) NSTimer *timer;
@property (nonatomic,strong) NSURL *recordedFile;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// 设置好文件的存储位置NSFileManager *manager = [NSFileManager defaultManager];NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *path = [pathArray lastObject];path = [path stringByAppendingPathComponent:@"RecordedFile"];bool existsFlag = [manager fileExistsAtPath:path];if (!existsFlag) {bool isSuccess = [manager createFileAtPath:path contents:nil attributes:nil];if (isSuccess) {NSLog(@"创建成功");}else{NSLog(@"创建失败");}}_recordedFile = [NSURL fileURLWithPath:path];AVAudioSession *session = [AVAudioSession sharedInstance];NSError *error;// 开启录音和播放功能[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];if (session == nil) {NSLog(@"session is error ---->%@",error.description);}else{[session setActive:true error:nil];}_hud = [[RecordingHub alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2-100/2, self.view.bounds.size.height/2, 100, 100)];[_voiderBtn addTarget:self action:@selector(touchDown:) forControlEvents:UIControlEventTouchDown];[_voiderBtn addTarget:self action:@selector(touchOutside:) forControlEvents:UIControlEventTouchUpInside];
}// 按下的时候
- (void)touchDown:(UIButton *)btn{[_hud recordButtonTouchDown];NSMutableDictionary * recordSetting = [NSMutableDictionary dictionary];//设置录音格式[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];//设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）[recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];//录音通道数  1 或 2[recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];// 初始化录音_recorder = [[AVAudioRecorder alloc]initWithURL:_recordedFile settings:recordSetting error:nil];// 准备录音[_recorder prepareToRecord];//开启音量检测_recorder.meteringEnabled = YES;// 开始录音[_recorder record];NSLog(@"开始录音.....");_timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(changeVoider) userInfo:nil repeats:YES];
}// 抬起来的时候
- (void)touchOutside:(UIButton *)btn{[_hud recordButtonTouchUpOutside];[_timer invalidate];
}//  声音变化
- (void)changeVoider{float peakPower = [_recorder averagePowerForChannel:0];NSLog(@"声音的变化--->%f",peakPower);[_recorder updateMeters];_hud.peakPower = peakPower;
}@end

效果如下：

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