iOS中调用系统录音功能及其播放
最近做的项目中，用到了录音的功能，简单记录一下。
我的想法是：通过重写button的点击事件，来达到录音的目的。
/*----------------------------------【录音】-----------------------------*/
首先，需要新建文件，并继承于UIButton，暂且命名为 TDRecoedButton；
在.h文件中：
#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioToolbox.h>
#import <AVFoundation/AVFoundation.h>
typedef void (^successRecordToSend)(NSInteger time,NSURL *url);
typedef void (^faildRecordToSend)(NSString * reason);
@interface TDRecoedButton : UIButton<AVAudioRecorderDelegate>
{
AVAudioRecorder *recorder; //录音的对象
NSTimer *timer; //时间
NSURL *urlPlay; //保存路径
}
//录音并保存成功
@property (nonatomic,copy) successRecordToSend successBlock;
-(void)setBtnSuccessRecord:(successRecordToSend)sendBlock;
//录音失败及返回reason方法
@property (nonatomic,copy) faildRecordToSend faildBlock;
-(void)setBtnFaildRecord:(faildRecordToSend)sendBlock;
在.m文件中：
#import "TDRecoedButton.h"
#define reason @"录音时间太短!"
@implementation TDRecoedButton
-(instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
[self audio];
[self setBackgroundImage:[UIImage imageNamed:@"icon_voice_normal"] forState:UIControlStateNormal];
[self setBackgroundImage:[UIImage imageNamed:@"icon_voice_pressed"] forState:UIControlStateHighlighted];
[self addTarget:self action:@selector(btnDown:) forControlEvents:UIControlEventTouchDown];
[self addTarget:self action:@selector(btnUp:) forControlEvents:UIControlEventTouchUpInside];
[self addTarget:self action:@selector(btnDragUp:) forControlEvents:UIControlEventTouchDragExit];
}
return self;
}
- (IBAction)btnDown:(id)sender
{
//创建录音文件，准备录音
if ([recorder prepareToRecord]) {
//开始
[recorder record];
}
//设置定时检测
// timer = [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(detectionVoice) userInfo:nil repeats:YES];
}
- (IBAction)btnUp:(id)sender
{
NSInteger cTime = recorder.currentTime;
if (cTime > 1) {//如果录制时间<1 不发送
NSLog(@"发出去");
if (_successBlock) {
_successBlock(cTime,urlPlay);
}
}else {
//删除记录的文件
[recorder deleteRecording];
//删除存储的
if (_faildBlock) {
_faildBlock(reason);
}
}
[recorder stop];
[timer invalidate];
}
- (IBAction)btnDragUp:(id)sender
{
//删除录制文件
[recorder deleteRecording];
[recorder stop];
[timer invalidate];
NSLog(@"取消发送");
}
-(void)audio
{
//录音设置
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc]init];
//设置录音格式 AVFormatIDKey==kAudioFormatLinearPCM
[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:44100] forKey:AVSampleRateKey];
//录音通道数 1 或 2
[recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];
//线性采样位数 8、16、24、32
[recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
//录音的质量
[recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/byingRecord.aac", strUrl]];
NSLog(@"*********url:%@",url);
urlPlay = url;
NSError *error;
//初始化
recorder = [[AVAudioRecorder alloc]initWithURL:url settings:recordSetting error:&error];
//开启音量检测
recorder.meteringEnabled = YES;
recorder.delegate = self;
}
-(void)setBtnSuccessRecord:(successRecordToSend)sendBlock
{
self.successBlock = sendBlock;
}
-(void)setBtnFaildRecord:(faildRecordToSend)sendBlock
{
self.faildBlock = sendBlock;
}
这样，重写的button就成功了，在别的控制器中，导入头文件，生成对象，就可以录音了。
但是，这样写，在模拟器上运行是完全ok的，当我跑真机的时候，就一直报错，于是，我找了一些帖子，找到了解决办法。
解决办法：
在实例化record之前，加入以下这段代码：
AVAudioSession *session = [AVAudioSession sharedInstance];
NSError *setCategoryError = nil;
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&setCategoryError];
if(setCategoryError){
NSLog(@"%@", [setCategoryError description]);
if (_faildBlock) {
_faildBlock([setCategoryError description]);
}
}
这样就可以在真机上运行了。
/*----------------------------------【播放】-----------------------------*/
播放相对就简单了，主要就是找到存储的路径：
首先，定义一个对象：
@property (nonatomic,strong) AVAudioPlayer * avPlay; /*播放*/
@property (nonatomic,strong) NSURL * urlPlay; /*播放路径*/
在播放按钮的点击事件中，加入此方法：
#pragma mark - 点击播放录音
-(void)pressRecordPlayBtn:(id)sender
{
if (self.avPlay.playing) {
[self.avPlay stop];
return;
}
AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:_urlPlay error:nil];//_urlPlay是保存录音的路径
self.avPlay = player;
[self.avPlay play];
}
这样，就可以实现录音和播放的功能了！
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