gistfile1.m

//
//  RCViewController.m
//  recording
//
//  Created by Mike Kavouras on 7/14/14.
//  Copyright (c) 2014 Mike Kavouras. All rights reserved.
//

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

@interface RCViewController () <AVAudioPlayerDelegate, AVAudioRecorderDelegate>

@property (nonatomic, strong) AVAudioPlayer *audioPlayer;

@property (nonatomic, strong) AVAudioRecorder *audioRecorder;

@property (weak, nonatomic) IBOutlet UIButton *recordButton;

@property (weak, nonatomic) IBOutlet UIButton *stopButton;

@property (weak, nonatomic) IBOutlet UIButton *playButton;

@end

@implementation RCViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self.stopButton setEnabled:NO];
    [self.playButton setEnabled:NO];
    
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
    
    [self setup];
}

- (IBAction)recordButtonTapped:(id)sender
{
    if (self.audioPlayer.isPlaying) {
        [self.audioPlayer pause];
    }
    
    if ( ! self.audioRecorder.recording) {
        AVAudioSession *session = [AVAudioSession sharedInstance];
        [session setActive:YES error:nil];
        
        // Start recording
        [self.audioRecorder record];
        [self.recordButton setTitle:@"Pause" forState:UIControlStateNormal];
    } else {
        
        // Pause recording
        [self.audioRecorder pause];
        [self.recordButton setTitle:@"Record" forState:UIControlStateNormal];
    }
    
    [self.stopButton setEnabled:YES];
    [self.playButton setEnabled:NO];
}

- (IBAction)stopButtonTapped:(id)sender
{
    [self.audioRecorder stop];
    
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setActive:NO error:nil];
}

- (IBAction)playButtonTapped:(id)sender
{
    NSError *error;
    self.audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:self.audioRecorder.url error:&error];
    self.audioPlayer.delegate = self;
    
    if ( ! self.audioRecorder.recording) {
        [self.audioPlayer play];
    }
}

- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag
{
    [self.recordButton setTitle:@"Record" forState:UIControlStateNormal];
    
    [self.stopButton setEnabled:NO];
    [self.playButton setEnabled:YES];
}

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Done" message:@"Finish playing the recording" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

- (void)setup
{
    NSArray *pathComponents = [NSArray arrayWithObjects:
                               [NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES) lastObject],
                               @"MyAudioMemo.m4a", nil];
    NSURL *outputFileUrl = [NSURL fileURLWithPathComponents:pathComponents];
    
    NSMutableDictionary *recordSettings = [NSMutableDictionary dictionary];
    
    [recordSettings setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKeyPath:AVFormatIDKey];
    [recordSettings setValue:[NSNumber numberWithFloat:44100.0] forKeyPath:AVSampleRateKey];
    [recordSettings setValue:[NSNumber numberWithInt:2] forKeyPath:AVNumberOfChannelsKey];
    
    self.audioRecorder = [[AVAudioRecorder alloc] initWithURL:outputFileUrl settings:recordSettings error:nil];
    self.audioRecorder.delegate = self;
    self.audioRecorder.meteringEnabled = YES;
    [self.audioRecorder prepareToRecord];
    

}


@end