录音

录音

1.#import "ViewController.h"
2.#import "CDMyUtil.h"
3.#import <AVFoundation/AVFoundation.h>
4.
5.@interface ViewController () {
6.    AVAudioRecorder *myRecorder;
7.
8.    NSDictionary *dict;
9.}
10.
11.@end
12.
13.@implementation ViewController
14.
15.- (void)viewDidLoad {
16.    [super viewDidLoad];
17.
18.    // 对AVAudioRecorder对象的设置
19.    dict = @{
20.        AVEncoderAudioQualityKey:[NSNumber numberWithInt:AVAudioQualityLow],
21.        AVEncoderBitRateKey:[NSNumber numberWithInt:16],
22.        AVNumberOfChannelsKey:[NSNumber numberWithInt:2],
23.        AVSampleRateKey:[NSNumber numberWithInt:44100]
24.    };
25.
26.    NSLog(@"%@", NSHomeDirectory());
27.}
28.
29.- (IBAction)recordButtonClicked:(UIButton *)sender {
30.    if (!myRecorder) {
31.        // 指定一个文件路径
32.        NSString *filePath = [NSHomeDirectory() stringByAppendingString:[NSString stringWithFormat:@"/Documents/%@.caf", [CDMyUtil timeStringWithFormat:@"yyyyMMddHHmmssSSS"]]];
33.        // 通过文件路径获得文件的URL
34.        NSURL *fileUrl = [NSURL fileURLWithPath:filePath];
35.        // 创建AVAudioRecorder对象
36.        myRecorder = [[AVAudioRecorder alloc] initWithURL:fileUrl settings:dict error:nil];
37.    }
38.
39.
40.    if (myRecorder.isRecording) {
41.        [myRecorder stop];  // 结束录制
42.        [sender setTitle:@"录音" forState:UIControlStateNormal];
43.        myRecorder = nil;
44.    }
45.    else {
46.        [myRecorder prepareToRecord];
47.        [myRecorder record];    // 开始录制
48.        [sender setTitle:@"结束" forState:UIControlStateNormal];
49.    }
50.}
51.
52.@end
53.