小编给大家分享一下iOS如何使用音频处理框架The Amazing Audio Engine实现音频录制播放，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
首先看一下效果图：
下面贴上核心控制器代码：
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
#import "HWProgressHUD.h"
#import "UIImage+HW.h"
#import "AERecorder.h"
#import "HWRecordingDrawView.h"
#define KMainW [UIScreen mainScreen].bounds.size.width
#define KMainH [UIScreen mainScreen].bounds.size.height
@interface ViewController ()
@property (nonatomic, strong) AERecorder *recorder;
@property (nonatomic, strong) AEAudioController *audioController;
@property (nonatomic, strong) AEAudioFilePlayer *player;
@property (nonatomic, strong) AEAudioFilePlayer *backgroundPlayer;
@property (nonatomic, strong) NSTimer *timer;
@property (nonatomic, strong) NSMutableArray *soundSource;
@property (nonatomic, weak) HWRecordingDrawView *recordingDrawView;
@property (nonatomic, weak) UILabel *recLabel;
@property (nonatomic, weak) UILabel *recordTimeLabel;
@property (nonatomic, weak) UILabel *playTimeLabel;
@property (nonatomic, weak) UIButton *auditionBtn;
@property (nonatomic, weak) UIButton *recordBtn;
@property (nonatomic, weak) UISlider *slider;
@property (nonatomic, copy) NSString *path;
@end
@implementation ViewController
- (AEAudioController *)audioController
{
if (!_audioController) {
_audioController = [[AEAudioController alloc] initWithAudioDescription:[AEAudioController nonInterleavedFloatStereoAudioDescription] inputEnabled:YES];
_audioController.preferredBufferDuration = 0.005;
_audioController.useMeasurementMode = YES;
}
return _audioController;
}
- (NSMutableArray *)soundSource
{
if (!_soundSource) {
_soundSource = [NSMutableArray array];
}
return _soundSource;
}
- (void)viewDidLoad {
[super viewDidLoad];
[self creatControl];
}
- (void)creatControl
{
CGFloat marginX = 30.0f;
//音频视图
HWRecordingDrawView *recordingDrawView = [[HWRecordingDrawView alloc] initWithFrame:CGRectMake(marginX, 80, KMainW - marginX * 2, 100)];
[self.view addSubview:recordingDrawView];
_recordingDrawView = recordingDrawView;
//REC
UILabel *recLabel = [[UILabel alloc] initWithFrame:CGRectMake(marginX, CGRectGetMaxY(recordingDrawView.frame) + 20, 80, 40)];
recLabel.text = @"REC";
recLabel.textColor = [UIColor redColor];
[self.view addSubview:recLabel];
_recLabel = recLabel;
//录制时间
UILabel *recordTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(recLabel.frame) + 20, CGRectGetMinY(recLabel.frame), 150, 40)];
recordTimeLabel.text = @"录制时长：00:00";
[self.view addSubview:recordTimeLabel];
_recordTimeLabel = recordTimeLabel;
//播放时间
UILabel *playTimeLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMinX(recordTimeLabel.frame), CGRectGetMaxY(recordTimeLabel.frame), 150, 40)];
playTimeLabel.text = @"播放时长：00:00";
playTimeLabel.hidden = YES;
[self.view addSubview:playTimeLabel];
_playTimeLabel = playTimeLabel;
//配乐按钮
NSArray *titleArray = @[@"无配乐", @"夏天", @"阳光海湾"];
CGFloat btnW = 80.0f;
CGFloat padding = (KMainW - marginX * 2 - btnW * titleArray.count) / (titleArray.count - 1);
for (int i = 0; i < titleArray.count; i++) {
CGFloat btnX = marginX + (btnW + padding) * i;
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(btnX, CGRectGetMaxY(playTimeLabel.frame) + 20, btnW, btnW)];
[btn setTitle:titleArray[i] forState:UIControlStateNormal];
btn.layer.cornerRadius = btnW * 0.5;
btn.layer.masksToBounds = YES;
[btn setBackgroundImage:[UIImage imageWithColor:[UIColor grayColor]] forState:UIControlStateNormal];
[btn setBackgroundImage:[UIImage imageWithColor:[UIColor orangeColor]] forState:UIControlStateSelected];
if (i == 0) btn.selected = YES;
btn.tag = 100 + i;
[btn addTarget:self action:@selector(changeBackgroundMusic:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
}
//配乐音量
UILabel *backgroundLabel = [[UILabel alloc] initWithFrame:CGRectMake(marginX + 10, CGRectGetMaxY(playTimeLabel.frame) + 120, 80, 40)];
backgroundLabel.text = @"配乐音量";
[self.view addSubview:backgroundLabel];
//配乐音量
UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(CGRectGetMaxX(backgroundLabel.frame) + 10, CGRectGetMinY(backgroundLabel.frame), 210, 40)];
slider.value = 0.4f;
[slider addTarget:self action:@selector(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:slider];
_slider = slider;
//试听按钮
UIButton *auditionBtn = [[UIButton alloc] initWithFrame:CGRectMake(marginX, KMainH - 150, 120, 80)];
auditionBtn.hidden = YES;
auditionBtn.backgroundColor = [UIColor blackColor];
[auditionBtn setTitle:@"试听" forState:UIControlStateNormal];
[auditionBtn setTitle:@"停止" forState:UIControlStateSelected];
[auditionBtn addTarget:self action:@selector(auditionBtnOnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:auditionBtn];
_auditionBtn = auditionBtn;
//录音按钮
UIButton *recordBtn = [[UIButton alloc] initWithFrame:CGRectMake(KMainW - marginX - 120, KMainH - 150, 120, 80)];
recordBtn.backgroundColor = [UIColor blackColor];
[recordBtn setTitle:@"开始" forState:UIControlStateNormal];
[recordBtn setTitle:@"暂停" forState:UIControlStateSelected];
[recordBtn addTarget:self action:@selector(recordBtnOnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:recordBtn];
_recordBtn = recordBtn;
}
//配乐按钮点击事件
- (void)changeBackgroundMusic:(UIButton *)btn
{
//更新选中状态
for (int i = 0; i < 3; i++) {
UIButton *button = (UIButton *)[self.view viewWithTag:100 + i];
button.selected = NO;
}
btn.selected = YES;
//移除之前配乐
if (_backgroundPlayer) {
[_audioController removeChannels:@[_backgroundPlayer]];
_backgroundPlayer = nil;
}
NSURL *url;
if (btn.tag == 100) {
return;
}else if (btn.tag == 101) {
url = [[NSBundle mainBundle]URLForResource:@"夏天.mp3" withExtension:nil];
}else if (btn.tag == 102) {
url = [[NSBundle mainBundle]URLForResource:@"阳光海湾.mp3" withExtension:nil];
}
[self.audioController start:NULL];
NSError *AVerror = NULL;
_backgroundPlayer = [AEAudioFilePlayer audioFilePlayerWithURL:url error:&AVerror];
_backgroundPlayer.volume = _slider.value;
_backgroundPlayer.loop = YES;
if (!_backgroundPlayer) {
[[[UIAlertView alloc] initWithTitle:@"Error"
message:[NSString stringWithFormat:@"Couldn't start playback: %@", [AVerror localizedDescription]]
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:@"OK", nil] show];
return;
}
//放完移除
_backgroundPlayer.removeUponFinish = YES;
__weak ViewController *weakSelf = self;
_backgroundPlayer.completionBlock = ^{
weakSelf.backgroundPlayer = nil;
};
[_audioController addChannels:@[_backgroundPlayer]];
}
//配乐音量slider滑动事件
- (void)sliderValueChanged:(UISlider *)slider
{
if (_backgroundPlayer) _backgroundPlayer.volume = slider.value;
}
//录音按钮点击事件
- (void)recordBtnOnClick:(UIButton *)btn
{
[[AVAudioSession sharedInstance] requestRecordPermission:^(BOOL granted) {
if (granted) {
//用户同意获取麦克风
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(.1f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
btn.selected = !btn.selected;
if (btn.selected) {
[self startRecord];
}else {
[self finishRecord];
}
});
}else {
//用户不同意获取麦克风
[HWProgressHUD showMessage:@"需要访问您的麦克风，请在“设置-隐私-麦克风”中允许访问。" duration:3.f];
}
}];
}
//开始录音
- (void)startRecord
{
_auditionBtn.hidden = YES;
[self.audioController start:NULL];
_recorder = [[AERecorder alloc] initWithAudioController:_audioController];
_path = [self getPath];
NSError *error = NULL;
if ( ![_recorder beginRecordingToFileAtPath:_path fileType:kAudioFileM4AType error:&error] ) {
[[[UIAlertView alloc] initWithTitle:@"Error" message:[NSString stringWithFormat:@"Couldn't start recording: %@", [error localizedDescription]] delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil] show];
_recorder = nil;
return;
}
[self.soundSource removeAllObjects];
[self removeTimer];
[self addRecordTimer];
[_audioController addOutputReceiver:_recorder];
[_audioController addInputReceiver:_recorder];
}
//结束录音
- (void)finishRecord
{
_auditionBtn.hidden = NO;
_recLabel.hidden = NO;
[self removeTimer];
[_recorder finishRecording];
[_audioController removeOutputReceiver:_recorder];
[_audioController removeInputReceiver:_recorder];
_recorder = nil;
}
//添加录音定时器
- (void)addRecordTimer
{
self.timer = [NSTimer scheduledTimerWithTimeInterval:.2f target:self selector:@selector(recordTimerAction) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
}
//录音定时器事件
- (void)recordTimerAction
{
//获取音频
[CATransaction begin];
[CATransaction setDisableActions:YES];
Float32 inputAvg, inputPeak, outputAvg, outputPeak;
[_audioController inputAveragePowerLevel:&inputAvg peakHoldLevel:&inputPeak];
[_audioController outputAveragePowerLevel:&outputAvg peakHoldLevel:&outputPeak];
[self.soundSource insertObject:[NSNumber numberWithFloat:(inputPeak + 18) * 2.8] atIndex:0];
[CATransaction commit];
_recordingDrawView.pointArray = _soundSource;
//REC闪动
_recLabel.hidden = (int)[self.recorder currentTime] % 2 == 1 ? YES : NO;
//录音时间
NSString *str = [self strWithTime:[self.recorder currentTime] interval:0.5f];
if ([str intValue] < 0) str = @"录制时长：00:00";
[self.recordTimeLabel setText:[NSString stringWithFormat:@"录制时长：%@", str]];
}
//移除定时器
- (void)removeTimer
{
[self.timer invalidate];
self.timer = nil;
}
//试听按钮点击事件
- (void)auditionBtnOnClick:(UIButton *)btn
{
btn.selected = !btn.selected;
if (btn.selected) {
[self playRecord];
}else {
[self stopPlayRecord];
}
}
//播放录音
- (void)playRecord
{
//更新界面
_recordBtn.hidden = YES;
[_playTimeLabel setText:@"播放时长：00:00"];
_playTimeLabel.hidden = NO;
//取消背景音乐
[self changeBackgroundMusic:(UIButton *)[self.view viewWithTag:100]];
if (![[NSFileManager defaultManager] fileExistsAtPath:_path]) return;
NSError *error = nil;
_player = [AEAudioFilePlayer audioFilePlayerWithURL:[NSURL fileURLWithPath:_path] error:&error];
if (!_player) {
[[[UIAlertView alloc] initWithTitle:@"Error"
message:[NSString stringWithFormat:@"Couldn't start playback: %@", [error localizedDescription]]
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:@"OK", nil] show];
return;
}
[self addPlayTimer];
_player.removeUponFinish = YES;
__weak ViewController *weakSelf = self;
_player.completionBlock = ^{
weakSelf.player = nil;
weakSelf.auditionBtn.selected = NO;
[weakSelf stopPlayRecord];
};
[self.audioController start:NULL];
[self.audioController addChannels:@[_player]];
}
//停止播放录音
- (void)stopPlayRecord
{
_recordBtn.hidden = NO;
_playTimeLabel.hidden = YES;
[self removeTimer];
if (_player) [_audioController removeChannels:@[_player]];
}
//添加播放定时器
- (void)addPlayTimer
{
self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(playTimerAction) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
}
//播放定时器事件
- (void)playTimerAction
{
//播放时间
NSString *str = [self strWithTime:[_player currentTime] interval:1.f];
if ([str intValue] < 0) str = @"播放时长：00:00";
[_playTimeLabel setText:[NSString stringWithFormat:@"播放时长：%@", str]];
}
//录制音频沙盒路径
- (NSString *)getPath
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"YYYYMMddhhmmss"];
NSString *recordName = [NSString stringWithFormat:@"%@.wav", [formatter stringFromDate:[NSDate date]]];
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:recordName];
return path;
}
//时长长度转时间字符串
- (NSString *)strWithTime:(double)time interval:(CGFloat)interval
{
int minute = (time * interval) / 60;
int second = (int)(time * interval) % 60;
return [NSString stringWithFormat:@"%02d:%02d", minute, second];
}
@end看完了这篇文章，相信你对“iOS如何使用音频处理框架The Amazing Audio Engine实现音频录制播放”有了一定的了解，如果想了解更多相关知识，欢迎关注亿速云行业资讯频道，感谢各位的阅读！
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