How to save audio to documents in iPhone? - ios

Question

I tried to record an audio and save it to documents folder, but the program can only work in simulator. Once I run it in my iPhone(ios 8.3), it cannot work. Is there something wrong with my codes? Thank you.
Here is h file:
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <AVFoundation/AVAudioPlayer.h>
#import <AVFoundation/AVAudioRecorder.h>
#import <Accelerate/Accelerate.h>
#interface ViewController : UIViewController{
AVAudioPlayer *player;
AVAudioRecorder *recorder;
}
- (IBAction)REC:(id)sender;
- (IBAction)STOP_and_SAVE:(id)sender;
- (IBAction)PLAY:(id)sender;
#property (nonatomic, strong) NSString *Record_path1_string;
#end
m file:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)REC:(id)sender {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
self.Record_path1_string = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"bbb.wav"];
recorder = [[AVAudioRecorder alloc] initWithURL:[NSURL fileURLWithPath: self.Record_path1_string] settings:nil error:nil];
[recorder prepareToRecord];
[recorder record];
NSLog(#"recording!");
}
- (IBAction)STOP_and_SAVE:(id)sender {
[recorder stop];
}
- (IBAction)PLAY:(id)sender {
player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath: self.Record_path1_string] error:nil];
[player play];
}
#end
I have checked the Documents folder in simulator in my Mac, the audio file has been saved, but I cannot check Documents folder in my iPhone.