屏幕快照 2017-08-21 下午7.38.44.png

如圖所示 首先拖拽 3個(gè)button控件與兩個(gè)lable控件,并寫上title,然后將其關(guān)聯(lián)

屏幕快照 2017-08-21 下午7.40.34.png

接下來 進(jìn)入代碼的階段

首先 要導(dǎo)入AVFoundation框架,并設(shè)置代理 以及創(chuàng)建一些全局變量方便以后的調(diào)用

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVAudioRecorderDelegate>
{
    AVAudioRecorder *_audioRecoder;//音頻錄音機(jī)
    AVAudioPlayer *_avplayer;//音頻播放器
    NSTimer *_timer;//定時(shí)器
    int      _count;//保存數(shù)量
    BOOL     _isSwitch;//是否開關(guān)
    
}

此處是關(guān)聯(lián)過來的方法以及文件的存儲(chǔ)路徑

// 開始錄制
@property (weak, nonatomic) IBOutlet UIButton *btnStart;
// 顯示時(shí)間
@property (weak, nonatomic) IBOutlet UILabel *showTime;
// 回放屬性
@property (weak, nonatomic) IBOutlet UIButton *btnPlayBack;
// 文件路徑
@property(nonatomic,copy)NSString *documentsPath;

// 開始錄制
- (IBAction)startRecording:(id)sender;

// 停止錄制
- (IBAction)stopRecording:(id)sender;

// 回放錄音
- (IBAction)playBackRecording:(id)sender;

注意在 拖拽按鈕的時(shí)候 我們需要將其Connection處改成Action在進(jìn)行關(guān)聯(lián),這樣的操作可以方便我們?cè)诎粹o的方法里直接書寫代碼

在viewDidLoad中進(jìn)行以下的書寫

- (void)viewDidLoad
{
    [super viewDidLoad];
    _isSwitch = YES;
}

開始按鈕

// 開始錄制
- (IBAction)startRecording:(id)sender
{
    
    // 判斷錄音控制器是否為空或者正在錄制
    if (_audioRecoder == nil && _audioRecoder.isRecording)
    {
        // 設(shè)置控制器停止錄制
        [_audioRecoder stop];
        // 設(shè)置按鈕的標(biāo)題為開始錄制
        [_btnStart setTitle:@"開始錄制" forState:UIControlStateNormal];
        [_timer invalidate];
        _timer = nil;
    }
    else
    {
        _count = 0;
        _timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(repeatShowTime:) userInfo:@"admin" repeats:YES];
        
#pragma mark 下面設(shè)置錄音的參數(shù)和錄音文件的保存路徑等信息
        //獲取音頻文件的保存路徑
        NSString *destinationStr = [[self documentsPath] stringByAppendingPathComponent:@"sound.wav"];
        NSURL *destinationUrl = [NSURL fileURLWithPath:destinationStr];
        //創(chuàng)建一個(gè)Dictionary顽悼，用于保存錄制屬性
        NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];
        //設(shè)置錄制音頻的格式
        [recordSettings setObject:[NSNumber numberWithInt:kAudioFormatLinearPCM]forKey:AVFormatIDKey];
        //設(shè)置錄制音頻的采樣率
        //        [recordSettings setObject:[NSNumber numberWithFloat:@"1".floatValue] forKey:AVSampleRateKey];
        //設(shè)置錄制音頻的通道數(shù)
        [recordSettings setObject:[NSNumber numberWithInt:(_isSwitch =/* DISABLES CODE */ (YES) ?2:1)]forKey:AVNumberOfChannelsKey];
        //設(shè)置錄制音頻采用高位優(yōu)先的記錄格式
        [recordSettings setObject:[NSNumber numberWithBool:YES]forKey:AVLinearPCMIsBigEndianKey];
        //設(shè)置采樣信號(hào)采用浮點(diǎn)數(shù)
        [recordSettings setObject:[NSNumber numberWithBool:YES]forKey:AVLinearPCMIsFloatKey];
        NSError *recorderSetupError =nil;
        
#pragma mark 到這里開始實(shí)例化錄音對(duì)象
        //初始化AVAudioRecorder
        _audioRecoder = [[AVAudioRecorder alloc] initWithURL:destinationUrl settings:recordSettings error:&recorderSetupError];
        _audioRecoder.delegate =self;
        [_audioRecoder record];
        //設(shè)置單個(gè)按鈕的狀態(tài)為錄音
        [_btnStart setTitle:@"正在錄音"forState:UIControlStateNormal];
    }
}

停止按鈕

// 停止錄制
- (IBAction)stopRecording:(id)sender
{
    [_audioRecoder stop];
    [_btnStart setTitle:@"開始錄制" forState:UIControlStateNormal];
    // 設(shè)置計(jì)時(shí)器為初始值
    if (_timer)
    {
        [_timer invalidate];
        _timer =nil;
    }
    _count = 0;
    _showTime.text = @"00:00";
}

回放按鈕

// 回放錄音
- (IBAction)playBackRecording:(id)sender
{
    // 獲取音頻文件的保存路徑
   NSString *destinationString = [[self documentsPath] stringByAppendingPathComponent:@"sound.wav"];
    NSURL *url = [NSURL fileURLWithPath:destinationString];
    //創(chuàng)建AVAudioPlayer對(duì)象
    _avplayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    //開始播放
    [_avplayer play];
    _btnPlayBack.backgroundColor=[UIColor greenColor];
}

獲取文件的路徑

//獲取Documents目錄路徑
-(NSString *)documentsPath
{
    
    if (!_documentsPath)
    {
        
        NSArray *searchPath =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
        _documentsPath = searchPath[0];
        
    }
    
    return _documentsPath;
}

錄音中的代理方法

#pragma mark- 錄制音頻的代理方法
- (void)audioRecorderBeginInterruption:(AVAudioRecorder *)recorder
{
    NSLog(@"---->被中斷巩趁！");
}
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)aRecorder successfully:(BOOL)flag
{
    if(flag)
    {
        NSLog(@"---->錄制完成Ｖā松逊！");
    }
}
- (void)repeatShowTime:(NSTimer *)tempTimer
{
    
    _count++;
    //設(shè)置在文本框上顯示時(shí)間纪蜒；
    _showTime.text = [NSString stringWithFormat:@"%02d:%02d",_count/60,_count%60];
}

- (void)dealloc
{  //銷毀NSTimer</span>
    if (_timer)
    {
        [_timer invalidate];
        _timer = nil;
    }
}