使用：
@interface ViewController () @property (nonatomic, strong) CameraTool *videoTool; @property (strong,nonatomic) AVCaptureVideoPreviewLayer *captureVideoPreviewLayer;//相机拍摄预览图层 @end @implementation ViewController - (CameraTool *)videoTool { if(!_videoTool) { _videoTool = [[CameraTool alloc]init]; } return _videoTool; } -(void)viewDidLoad { [super viewDidLoad]; self.captureVideoPreviewLayer = [self.videoTool previewLayer]; CALayer *layer=self.view.layer; layer.masksToBounds=YES; self.captureVideoPreviewLayer.frame = layer.bounds; [layer addSublayer:self.captureVideoPreviewLayer]; [self.videoTool startRecordFunction]; }主要代码：
CameraTool.h
#import <Foundation/Foundation.h> #import <AVFoundation/AVFoundation.h> typedef void(^Block)(NSData *data);//回调照片流 @interface CameraTool : NSObject @property (strong, nonatomic) NSString *videoPath;//视频路径 //捕获到的视频呈现的layer - (AVCaptureVideoPreviewLayer *)previewLayer; //启动录制功能 - (void)startRecordFunction; //关闭录制功能 - (void)stopRecordFunction; //开始录制 - (void) startCapture; //停止录制 - (void) stopCapture; //拍照 - (void)shutterCamera:(Block)block; //开启闪光灯 - (void)openFlashLight; //关闭闪光灯 - (void)closeFlashLight; //切换前后置摄像头 - (void)changeCameraInputDeviceisFront:(BOOL)isFront; -(void)saveAllVideoToPoto;//保存视频到相册 -(void)deleteAllVideo;//删除所有视频 @endCameraTool.m
#import "CameraTool.h" #import <AssetsLibrary/AssetsLibrary.h> #import <Photos/Photos.h> @interface CameraTool() <AVCaptureFileOutputRecordingDelegate> @property (strong, nonatomic) AVCaptureSession *captureSession; //负责输入和输出设备之间的连接会话,数据流的管理控制 @property (strong, nonatomic) AVCaptureVideoPreviewLayer *previewLayer;//捕获到的视频呈现的layer @property (strong, nonatomic) AVCaptureDeviceInput *backCameraInput;//后置摄像头输入 @property (strong, nonatomic) AVCaptureDeviceInput *frontCameraInput;//前置摄像头输入 @property (strong, nonatomic) AVCaptureDeviceInput *audioMicInput;//麦克风输入 @property (strong, nonatomic) AVCaptureConnection *videoConnection;//视频录制连接 @property (strong,nonatomic) AVCaptureMovieFileOutput *captureMovieFileOutput;//视频输出流 @property (nonatomic, strong)AVCaptureStillImageOutput *stillImageOutput;//照片输出流对象 @end @implementation CameraTool #pragma mark -API //启动录制功能 - (void)startRecordFunction { [self.captureSession startRunning]; } //关闭录制功能 - (void)stopRecordFunction { if(self.captureSession) [self.captureSession stopRunning]; } //开始录制 - (void)startCapture { if(self.captureMovieFileOutput.isRecording) return; NSString *defultPath = [self getVideoPathCache]; NSString *outputFielPath=[defultPath stringByAppendingPathComponent:[self getVideoNameWithType:@"mp4"]]; NSLog(@"save path is :%@",outputFielPath); NSURL *fileUrl=[NSURL fileURLWithPath:outputFielPath]; //设置录制视频流输出的路径 [self.captureMovieFileOutput startRecordingToOutputFileURL:fileUrl recordingDelegate:self]; } //停止录制 - (void) stopCapture { if ([self.captureMovieFileOutput isRecording]) { [self.captureMovieFileOutput stopRecording];//停止录制 } } // 这是拍照按钮的方法 - (void)shutterCamera:(Block)block { AVCaptureConnection *videoConnection = [self.stillImageOutput connectionWithMediaType:AVMediaTypeVideo]; if (!videoConnection) { NSLog(@"空"); return; } [self.stillImageOutput captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) { if (imageDataSampleBuffer == NULL) { return; } NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer]; block(imageData); UIImage *image = [UIImage imageWithData:imageData]; [self SavedPhoto:image]; NSLog(@"image size = %@", NSStringFromCGSize(image.size)); }]; } //保存图片到相册 - (void)SavedPhoto:(UIImage *)image { UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), (__bridge void *)self); } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { NSLog(@"image = %@, error = %@, contextInfo = %@", image, error, contextInfo); } //开启闪光灯 - (void)openFlashLight { //改变会话的配置前一定要先开启配置，配置完成后提交配置改变 //[self stopRecordFunction]; [self.captureSession beginConfiguration]; AVCaptureDevice *backCamera = [self backCamera]; if (backCamera.torchMode == AVCaptureTorchModeOff) { [backCamera lockForConfiguration:nil]; backCamera.torchMode = AVCaptureTorchModeOn; backCamera.flashMode = AVCaptureFlashModeOn; [backCamera unlockForConfiguration]; } //提交会话配置 [self.captureSession commitConfiguration]; [self startRecordFunction]; } //关闭闪光灯 - (void)closeFlashLight { //改变会话的配置前一定要先开启配置，配置完成后提交配置改变 // [self stopRecordFunction]; [self.captureSession beginConfiguration]; AVCaptureDevice *backCamera = [self backCamera]; if (backCamera.torchMode == AVCaptureTorchModeOn) { [backCamera lockForConfiguration:nil]; backCamera.torchMode = AVCaptureTorchModeOff; backCamera.flashMode = AVCaptureTorchModeOff; [backCamera unlockForConfiguration]; } //提交会话配置 [self.captureSession commitConfiguration]; [self startRecordFunction]; } //切换前后置摄像头 - (void)changeCameraInputDeviceisFront:(BOOL)isFront { //改变会话的配置前一定要先开启配置，配置完成后提交配置改变 [self stopRecordFunction]; [self.captureSession beginConfiguration]; if (isFront) { [self.captureSession removeInput:self.backCameraInput]; if ([self.captureSession canAddInput:self.frontCameraInput]) { //[self changeCameraAnimation]; [self.captureSession addInput:self.frontCameraInput]; } }else { [self.captureSession removeInput:self.frontCameraInput]; if ([self.captureSession canAddInput:self.backCameraInput]) { //[self changeCameraAnimation]; [self.captureSession addInput:self.backCameraInput]; } } //提交会话配置 [self.captureSession commitConfiguration]; [self startRecordFunction]; } #pragma mark - 视频输出代理 -(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections{ NSLog(@"开始录制..."); } -(void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{ NSLog(@"视频录制完成."); [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil]; [self startCapture]; //视频录入完成之后在后台将视频存储到相 // [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{ // [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:outputFileURL]; // } completionHandler:^(BOOL success, NSError * _Nullable error) { // if (error) { // NSLog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription); // }else { // NSLog(@"成功保存视频到相簿."); // } // }]; } -(void)saveAllVideoToPoto { NSArray *arr = [self getAllFile]; for (NSString *str in arr) { NSURL *fileUrl=[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/%@",[self getVideoPathCache],str]]; [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{ [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:fileUrl]; } completionHandler:^(BOOL success, NSError * _Nullable error) { if (error) { NSLog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription); }else { NSLog(@"成功保存视频到相簿."); } }]; } } -(void)deleteAllVideo { NSArray *arr = [self getAllFile]; for (NSString *str in arr) { NSString *file = [NSString stringWithFormat:@"%@/%@",[self getVideoPathCache],str]; NSFileManager *fileManager = [NSFileManager defaultManager]; BOOL is = [fileManager removeItemAtPath:file error:nil]; if (!is) { NSLog(@"删除文件错误"); } } } #pragma mark - 视频地址 - (NSString *)getVideoPathCache { NSString *videoCache = [NSTemporaryDirectory() stringByAppendingPathComponent:@"videos"] ; BOOL isDir = NO; NSFileManager *fileManager = [NSFileManager defaultManager]; BOOL existed = [fileManager fileExistsAtPath:videoCache isDirectory:&isDir]; if ( !(isDir == YES && existed == YES) ) { [fileManager createDirectoryAtPath:videoCache withIntermediateDirectories:YES attributes:nil error:nil]; }; return videoCache; } - (NSString *)getVideoNameWithType:(NSString *)fileType { NSTimeInterval now = [[NSDate date] timeIntervalSince1970]; NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"HHmmss"]; NSDate * NowDate = [NSDate dateWithTimeIntervalSince1970:now]; ; NSString * timeStr = [formatter stringFromDate:NowDate]; NSString *fileName = [NSString stringWithFormat:@"video_%@.%@",timeStr,fileType]; return fileName; } -(NSArray *)getAllFile { NSArray *files = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:[self getVideoPathCache] error:nil]; return files; } #pragma mark - Device init Method //捕获到的视频呈现的layer - (AVCaptureVideoPreviewLayer *)previewLayer { if (_previewLayer == nil) { //通过AVCaptureSession初始化 AVCaptureVideoPreviewLayer *preview = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession]; //设置比例为铺满全屏 preview.videoGravity = AVLayerVideoGravityResizeAspectFill; _previewLayer = preview; } return _previewLayer; } //捕获视频的会话 - (AVCaptureSession *)captureSession { if(_captureSession == nil) { _captureSession = [[AVCaptureSession alloc] init]; //设置分辨率 if ([_captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) { _captureSession.sessionPreset=AVCaptureSessionPreset1280x720; } //添加后置摄像头的输入 if ([_captureSession canAddInput:self.backCameraInput]) { [_captureSession addInput:self.backCameraInput]; } //添加后置麦克风的输入 if ([_captureSession canAddInput:self.audioMicInput]) { [_captureSession addInput:self.audioMicInput]; } //将设备输出添加到会话中 if ([_captureSession canAddOutput:self.captureMovieFileOutput]) { [_captureSession addOutput:self.captureMovieFileOutput]; } //照片输出流 if ([_captureSession canAddOutput:self.stillImageOutput]) { [_captureSession addOutput:self.stillImageOutput]; } //设置视频录制的方向 self.videoConnection.videoOrientation = AVCaptureVideoOrientationPortrait; } return _captureSession; } //后置摄像头输入 - (AVCaptureDeviceInput *)backCameraInput { if (_backCameraInput == nil) { NSError *error; _backCameraInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self backCamera] error:&error]; if (error) { NSLog(@"获取后置摄像头失败~%d",[self isAvailableWithCamera]); } } return _backCameraInput; } //前置摄像头输入 - (AVCaptureDeviceInput *)frontCameraInput { if (_frontCameraInput == nil) { NSError *error; _frontCameraInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self frontCamera] error:&error]; if (error) { NSLog(@"获取前置摄像头失败~"); } } return _frontCameraInput; } //麦克风输入 - (AVCaptureDeviceInput *)audioMicInput { if (_audioMicInput == nil) { AVCaptureDevice *mic = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio]; NSError *error; _audioMicInput = [AVCaptureDeviceInput deviceInputWithDevice:mic error:&error]; if (error) { NSLog(@"获取麦克风失败~%d",[self isAvailableWithMic]); } } return _audioMicInput; } //照片输出流 -(AVCaptureStillImageOutput *)stillImageOutput { if (!_stillImageOutput) { _stillImageOutput = [[AVCaptureStillImageOutput alloc] init]; // 这是输出流的设置参数AVVideoCodecJPEG参数表示以JPEG的图片格式输出图片 NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG, AVVideoCodecKey, nil]; [_stillImageOutput setOutputSettings:outputSettings]; } return _stillImageOutput; } //初始化设备输出对象，用于获得输出数据 - (AVCaptureMovieFileOutput *)captureMovieFileOutput { if(_captureMovieFileOutput == nil) { _captureMovieFileOutput = [[AVCaptureMovieFileOutput alloc]init]; } return _captureMovieFileOutput; } //视频连接 - (AVCaptureConnection *)videoConnection { _videoConnection = [self.captureMovieFileOutput connectionWithMediaType:AVMediaTypeVideo]; if ([_videoConnection isVideoStabilizationSupported ]) { _videoConnection.preferredVideoStabilizationMode=AVCaptureVideoStabilizationModeAuto; } return _videoConnection; } //返回前置摄像头 - (AVCaptureDevice *)frontCamera { return [self cameraWithPosition:AVCaptureDevicePositionFront]; } //返回后置摄像头 - (AVCaptureDevice *)backCamera { return [self cameraWithPosition:AVCaptureDevicePositionBack]; } //用来返回是前置摄像头还是后置摄像头 - (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition) position { //返回和视频录制相关的所有默认设备 NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; //遍历这些设备返回跟position相关的设备 for (AVCaptureDevice *device in devices) { if ([device position] == position) { return device; } } return nil; } @end @implementation CameraTool(Authorization) - (BOOL)isAvailableWithCamera { return [self isAvailableWithDeviveMediaType:AVMediaTypeVideo]; } - (BOOL)isAvailableWithMic { return [self isAvailableWithDeviveMediaType:AVMediaTypeAudio]; } - (BOOL)isAvailableWithDeviveMediaType:(NSString *)mediaType { AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if(status == ALAuthorizationStatusDenied||status == ALAuthorizationStatusRestricted) return NO; else return YES; } @end我的业余技术微信公众号：YKJGZH，欢迎大家进入
