现在我们使用的手机，无论是苹果还是安卓，都能够录音、拍照和录像，而且感觉这是在正常不过的了，不仅如此，现在的手机还能够修音，修图在这里就不介绍了，这里主要介绍如何实现录音、拍照和录像的功能。
一、录音
录音的介绍：使用的框架和音乐播放器一样使用的AVFoundation
录音使用到的类
（1）AVAudioRecord（输入）
（2）相关的设置属性
<1>AVNumberOfChannelsKey：通道数
<2>AVSampleRateKey：采样率 44100
<3>AVLinearPCMBitDepthKey：比特率 设置成16 32
<4>AVEncoderAudioQualityKey：质量
<5>AVEncoderBitRateKey：比特采样率 128000
录音的步骤
1、初始化了录音对象
2、开始录音
3、停止录音
具体代码
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<AVAudioRecorderDelegate>
{
AVAudioRecorder *audionRecorder;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(100, 100, 100, 100);
[button setTitle:@"TICK" forState:UIControlStateNormal];
button.backgroundColor = [UIColor brownColor];
[button addTarget:self action:@selector(startAudioRecorder:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)startAudioRecorder:(UIButton *)sender{
sender.selected = !sender.selected;
if (sender.selected != YES) {
[audionRecorder stop];//停止录音
}
// URL是本地的URL，audioRecorder
NSString *name = [NSString stringWithFormat:@"%d.aiff",(int)[NSDatedate].timeIntervalSince1970];
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:name];
// 1、初始化录音机
NSError *error;
audionRecorder = [[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:path] settings:@{AVNumberOfChannelsKey:@2,AVSampleRateKey:@44100,AVLinearPCMBitDepthKey:@32,AVEncoderAudioQualityKey:@(AVAudioQualityMax),AVEncoderBitRateKey:@128000} error:&error];
/*
AVNumberOfChannelsKey：通道数，通常为双声道 值2
AVSampleRateKey：采样率 HZ 通常设置为44100 44.1KHZ
AVLinearPCMBitDepthKey:比特率，通常为8 16 24 32
AVEncoderAudioQualityKey：声音质量，参数是一个枚举
AVAudioQualityMin = 0,最小的质量
AVAudioQualityLow = 0x20,比较低的质量
AVAudioQualityMedium = 0x40,中间的质量
AVAudioQualityHigh = 0x60,高的质量
AVAudioQualityMax = 0x7F最好的质量
AVEncoderBitRateKey：音频编码的比特率 单位BPS（传输速率）128000bps
*/
[audionRecorder prepareToRecord];//欲录音
[audionRecorder record];//开始录音
audionRecorder.delegate = self;
NSLog(@"%@",path);
}
//录音结束的时候调用
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{
// NSLog(@"录音结束");
NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject];
// 文件操作的类
NSFileManager *fileManager = [NSFileManager defaultManager];
// 获得当前文件的所有子文件subpathsAtPath：
NSArray *pathList = [fileManager subpathsAtPath:path];
// NSLog(@"%@",pathList);
// NSString *path1 = pathList[2];
// NSLog(@"%@",path1.pathExtension);
// 需要只获得录音文件
NSMutableArray *audioPathList = [NSMutableArray array];
// 遍历所有这个文件夹下面的子文件
for (NSString *audioPath in pathList) {
// 通过文件的扩展名（尾缀）来区分是不是录音文件
if ([audioPath.pathExtension isEqualToString:@"aiff"]) {
// 把筛选出来的文件放到数组，得到所有的音频wenjian
[audioPathList addObject:audioPath];
}
}
NSLog(@"%@",audioPathList);
}
录像和拍照的使用很相似，在这里就将它们两个一块讲了
录像、拍照
录像和拍照使用的框架是UIKit框架，使用的类是：UIImagePickerController
介绍一些属性和方法
区分选择摄像头还是相册：sourceType
UIImagePickerControllerSourceTypePhotoLibrary,
保存的相册
UIImagePickerControllerSourceTypeCamera,摄像头
UIImagePickerControllerSourceTypeSavedPhotosAlbum相册
区分录像和拍照cameraCaptureMode
拍照：UIImagePickerControllerCameraCaptureModePhoto
录像：UIImagePickerControllerCameraCaptureModeVideo
设置视频清晰度
UIImagePickerControllerQualityTypeHigh高清
UIImagePickerControllerQualityTypeMedium普通
UIImagePickerControllerQualityTypeLow
UIImagePickerControllerQualityType 640x480
UIImagePickerControllerQualityTypeIFrame 1280x720
UIImagePickerControllerQualityTypeIFrame 960x540
设置视频最大的持续时间
videoMaximumDuration 默认最大十分钟
区分前后摄像头：cameraDevice
前置：UIImagePickerControllerCameraDeviceFront
后置：UIImagePickerControllerCameraDeviceRear
是否显示控制控件：showsCameraControls
默认YES显示控制控件
设置拍照：takePicture
录像：startVideoCapture
停止：stopVideoCapture
闪光模式：cameraFlashMode，默认自动
UIImagePickerControllerCameraFlashModeOff = -1,关闭
UIImagePickerControllerCameraFlashModeAuto = 0,自动
UIImagePickerControllerCameraFlashModeOn = 1
开启
设置调用摄像头视图页面 覆盖视图
cameraOverlayView
设置拍照页面的形态 camereViewTransform
代理：需要导入两个代理
@property(nullable,nonatomic,weak) id <UINavigationControllerDelegate, UIImagePickerControllerDelegate> delegate;
代理方法：不区分录像和拍照
采集完成之后调用 不区分拍照和录像
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info;
采集取消的时候调用
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;
具体代码
#import "ViewController.h"
#import <AVKit/AVKit.h>
#import <AVFoundation/AVFoundation.h>
#import <MobileCoreServices/MobileCoreServices.h>
#define SCREEN_BOUNDS [UIScreen mainScreen].bounds//屏幕尺寸
#define SCREEN_WIDTH CGRectGetWidth([UIScreen mainScreen].bounds)//屏幕宽
#define SCREEN_HEIGHT CGRectGetHeight([UIScreen mainScreen].bounds)//屏幕高
@interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>
{
UILabel *lable;//显示拍照或者录像的控件
BOOL isMovie;//判断摄像的依据
UIImageView *imageView;//显示拍照录像结果的视图
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(100, 100, 100, 100);
[button setTitle:@"Camera" forState:UIControlStateNormal];
button.backgroundColor = [UIColor brownColor];
[button addTarget:self action:@selector(doit) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
UISwitch *medioSwitch = [[UISwitch alloc] initWithFrame:CGRectMake(SCREEN_WIDTH-100, 50, 50, 30)];
[medioSwitch addTarget:self action:@selector(changeMedio:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:medioSwitch];
lable = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMinX(medioSwitch.frame), CGRectGetMinY(medioSwitch.frame)-30, 50, 50)];
lable.textAlignment = NSTextAlignmentCenter;
lable.textColor = [UIColor purpleColor];
lable.text = @"拍照";
[self.view addSubview:lable];
imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 150, 200, 300)];
[self.view addSubview:imageView];
}
- (void)changeMedio:(UISwitch *)sender{
lable.text = sender.isOn != YES ? @"拍照":@"录像";
isMovie = sender.isOn;
}
- (void)doit{
// 创建录像、拍照对象
UIImagePickerController *pickImageController = [[UIImagePickerController alloc] init];
if (isMovie == YES) {
// 选择摄像头设备
// 默认选择相册
pickImageController.sourceType = UIImagePickerControllerSourceTypeCamera;
// 设置选择录像
// 默认拍照 选择cameraCaptureMode录像，一定要选择媒体的类型 不然会崩溃
// 选择媒体的类型
// 拍照的时候不选择媒体类型，不会崩溃，因为默认设置是kUTTypeImage
// kUTTypeImage包含在MobileCoreServices框架中
// MobileCoreServices需要的内容不是OC中字符串的类型，需要强转
// mediaTypes录制视频，类型要选择movie，因为movie里面包含了audio和video
pickImageController.mediaTypes = @[(NSString *)kUTTypeMovie];
pickImageController.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo;
}
// delegate里面包含两个协议
// UINavigationBarDelegate
// UIImagePickerControllerDelegate
pickImageController.delegate = self;
[self presentViewController:pickImageController animated:YES completion:nil];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
NSLog(@"完成");
NSLog(@">>>>%@",info);
if ([info [UIImagePickerControllerMediaType] isEqualToString:(NSString *)kUTTypeMovie]) {
NSLog(@"录像。。。。。");
NSLog(@"******%@",[info[UIImagePickerControllerMediaURL] path]);
// 将URL转换成path
NSString *path = (NSString *)[info[UIImagePickerControllerMediaURL] path];
// UIImagePickerControllerMediaURL
// 保存视频到URL
UISaveVideoAtPathToSavedPhotosAlbum(path, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);
}
if ([info [UIImagePickerControllerMediaType ] isEqualToString:(NSString *)kUTTypeImage]) {
NSLog(@"拍照了。。。。。");
// UIImagePickerControllerOriginalImage
// NSLog(@"%@",info [UIImagePickerControllerOriginalImage]);
UIImage *finishImage = info[UIImagePickerControllerOriginalImage];
imageView.image = nil;
imageView.image = finishImage;
// .jpeg的图片转换成二进制
NSData *imageData = UIImageJPEGRepresentation(finishImage, 0.1);
// .png的图片转换成二进制
NSData *imageData1 = UIImagePNGRepresentation(finishImage);
// 通过这个方法将图片保存到相册
UIImageWriteToSavedPhotosAlbum(finishImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
[self dismissViewControllerAnimated:YES completion:nil];
}
//视频保存到相册之后调用
- (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void*)contextInfo{
AVPlayer *player = [AVPlayer playerWithURL:[NSURL fileURLWithPath:videoPath]];
AVPlayerViewController *palyerVC = [[AVPlayerViewController alloc] init];
// [self.view addSubview:palyerVC.view];
palyerVC.player = player;
[self presentViewController:palyerVC animated:YES completion:nil];
[palyerVC.player play];
}
//图片保存到相册之后调用
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void*)contextInfo{
NSLog(@"保存图片成功");
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
NSLog(@"取消");
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
