类似微信发送语音，按下录音，松开结束录音；并且可播放

#import <AVFoundation/AVFoundation.h>

利用此框架中的

AVAudioRecorder和AVAudioPlayer来录音和播放以下是AVAudioRecorder录音的使用方法：

- (IBAction)downAction:(id)sender {

    按下录音

    if ([self canRecord]) {

        NSError *error = nil;

        必须真机上测试,模拟器上可能会崩溃

        recorder = [[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:playName] settings:recorderSettingsDict error:&error];

        if (recorder) {

            是否允许刷新电平表，默认是off

            recorder.meteringEnabled = YES;

            创建文件，并准备录音

            [recorder prepareToRecord];

            开始录音

            [recorder record];

            启动定时器,为了更新电平

            timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(levelTimer:) userInfo:nil repeats:YES];

        } else

        {

            int errorCode = CFSwapInt32HostToBig ([error code]);

            NSLog(@"Error: %@ [%4.4s])" , [error localizedDescription], (char*)&errorCode);

        }

    }

}

- (IBAction)upAction:(id)sender {

    松开 结束录音

    录音停止

    [recorder stop];

    recorder = nil;

    结束定时器

    [timer invalidate];

    timer = nil;

    图片重置

    soundLodingImageView.image = [UIImage imageNamed:[volumImages objectAtIndex:0]];

}

[cpp] view plain copy

- (IBAction)downAction:(id)sender {

    按下录音

    if ([self canRecord]) {

        NSError *error = nil;

        必须真机上测试,模拟器上可能会崩溃

        recorder = [[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:playName] settings:recorderSettingsDict error:&error];

        if (recorder) {

            是否允许刷新电平表，默认是off

            recorder.meteringEnabled = YES;

            创建文件，并准备录音

            [recorder prepareToRecord];

            开始录音

            [recorder record];

            启动定时器,为了更新电平

            timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(levelTimer:) userInfo:nil repeats:YES];

        } else

        {

            int errorCode = CFSwapInt32HostToBig ([error code]);

            NSLog(@"Error: %@ [%4.4s])" , [error localizedDescription], (char*)&errorCode);

        }

    }

}

- (IBAction)upAction:(id)sender {

    松开 结束录音

    录音停止

    [recorder stop];

    recorder = nil;

    结束定时器

    [timer invalidate];

    timer = nil;

    图片重置

    soundLodingImageView.image = [UIImage imageNamed:[volumImages objectAtIndex:0]];

}

以下是AVAudioPlayer播放器的使用方法：

- (IBAction)playAction:(id)sender {

    NSError *playerError;

    播放

    player = nil;

    player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:playName] error:&playerError];

    if (player == nil)

    {

        NSLog(@"ERror creating player: %@", [playerError description]);

    }else{

        [player play];

    }

}

- (IBAction)playAction:(id)sender {

    NSError *playerError;

    播放

    player = nil;

    player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:playName] error:&playerError];

    if (player == nil)

    {

        NSLog(@"ERror creating player: %@", [playerError description]);

    }else{

        [player play];

    }

}

提示:如果是7.0，第一次运行会提示，是否允许使用麦克风

if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0"] != NSOrderedAscending)

{

    7.0第一次运行会提示，是否允许使用麦克风

    AVAudioSession *session = [AVAudioSession sharedInstance];

    NSError *sessionError;

    AVAudioSessionCategoryPlayAndRecord用于录音和播放

    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];

    if(session == nil)

        NSLog(@"Error creating session: %@", [sessionError description]);

        else

            [session setActive:YES error:nil];

}

if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0"] != NSOrderedAscending)

{

    7.0第一次运行会提示，是否允许使用麦克风

    AVAudioSession *session = [AVAudioSession sharedInstance];

    NSError *sessionError;

    AVAudioSessionCategoryPlayAndRecord用于录音和播放

    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];

    if(session == nil)

        NSLog(@"Error creating session: %@", [sessionError description]);

        else

            [session setActive:YES error:nil];

}