iOS使用音频处理框架The Amazing Audio Engine实现音频录制播放

ios 第三方音频框架the amazing audio engine使用，实现音频录制、播放，可设置配乐。
首先看一下效果图：
下面贴上核心控制器代码：
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									#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