// // FUCamera.m // FULiveDemo // // Created by liuyang on 2016/12/26. // Copyright © 2016年 liuyang. All rights reserved. // #import "FUCamera.h" #import #import "FURecordEncoder.h" #import "SVProgressHUD.h" typedef enum : NSUInteger { CommonMode, PhotoTakeMode, VideoRecordMode, VideoRecordEndMode, } RunMode; typedef void(^FUCameraRecordVidepCompleted)(NSString *videoPath); @interface FUCamera() { RunMode runMode; BOOL hasStarted; BOOL videoHDREnabled; } @property (nonatomic, strong) AVCaptureSession *captureSession; @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 (nonatomic, strong) AVCaptureVideoDataOutput *videoOutput; //视频输出 @property (nonatomic, strong) AVCaptureConnection *videoConnection; @property (nonatomic, strong) AVCaptureDevice *camera; @property (assign, nonatomic) AVCaptureDevicePosition cameraPosition; @property (strong, nonatomic) FURecordEncoder *recordEncoder;//录制编码 @property (nonatomic, strong) AVCaptureDeviceInput *audioMicInput;//麦克风输入 @property (nonatomic, strong) AVCaptureAudioDataOutput *audioOutput;//音频输出 @property (copy, nonatomic) FUCameraRecordVidepCompleted recordVidepCompleted; @property (assign, nonatomic) AVCaptureSessionPreset mSessionPreset; @property (nonatomic) FUCameraFocusModel cameraFocusModel; @end @implementation FUCamera - (instancetype)initWithCameraPosition:(AVCaptureDevicePosition)cameraPosition captureFormat:(int)captureFormat { if (self = [super init]) { self.cameraPosition = cameraPosition; self.captureFormat = captureFormat; } return self; } - (instancetype)init { if (self = [super init]) { self.cameraPosition = AVCaptureDevicePositionFront; self.captureFormat = kCVPixelFormatType_32BGRA; videoHDREnabled = YES; } return self; } - (void)startCapture{ _cameraFocusModel = FUCameraModelAutoFace; if (![self.captureSession isRunning] && !hasStarted) { hasStarted = YES; // [self addAudio]; [self.captureSession startRunning]; /* 设置曝光中点 */ [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposeWithMode:AVCaptureExposureModeContinuousAutoExposure atDevicePoint:CGPointMake(0.5, 0.5) monitorSubjectAreaChange:YES]; } } - (void)stopCapture{ hasStarted = NO; // [self removeAudio]; if ([self.captureSession isRunning]) { [self.captureSession stopRunning]; } NSLog(@"视频采集关闭"); } - (void)addAudio{ if ([_captureSession canAddOutput:self.audioOutput]) { [_captureSession addOutput:self.audioOutput]; } } - (void)removeAudio { [_captureSession removeOutput:self.audioOutput]; } - (AVCaptureSession *)captureSession { if (!_captureSession) { _captureSession = [[AVCaptureSession alloc] init]; _captureSession.sessionPreset = AVCaptureSessionPreset1280x720; AVCaptureDeviceInput *deviceInput = self.isFrontCamera ? self.frontCameraInput:self.backCameraInput; [_captureSession beginConfiguration]; // the session to which the receiver's AVCaptureDeviceInput is added. if ([_captureSession canAddInput: deviceInput]) { [_captureSession addInput: deviceInput]; } if ([_captureSession canAddOutput:self.videoOutput]) { [_captureSession addOutput:self.videoOutput]; } if ([_captureSession canAddInput:self.audioMicInput]) { [_captureSession addInput:self.audioMicInput]; } [self addAudio]; [self.videoConnection setVideoOrientation:AVCaptureVideoOrientationPortrait]; if (self.videoConnection.supportsVideoMirroring && self.isFrontCamera) { self.videoConnection.videoMirrored = YES; } if ( [deviceInput.device lockForConfiguration:NULL] ) { [deviceInput.device setActiveVideoMinFrameDuration:CMTimeMake(1, 30)]; [deviceInput.device unlockForConfiguration]; } [_captureSession commitConfiguration]; // } 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~"); } } self.camera = _backCameraInput.device; // if ( [self.camera lockForConfiguration:NULL] ) { // self.camera.automaticallyAdjustsVideoHDREnabled = NO; // self.camera.videoHDREnabled = videoHDREnabled; // [self.camera unlockForConfiguration]; // } 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~"); } } self.camera = _frontCameraInput.device; // if ([self.camera lockForConfiguration:NULL] ) { // self.camera.automaticallyAdjustsVideoHDREnabled = NO; // self.camera.videoHDREnabled = videoHDREnabled; // [self.camera unlockForConfiguration]; // } return _frontCameraInput; } - (AVCaptureDeviceInput *)audioMicInput { if (!_audioMicInput) { //添加后置麦克风的输出 AVCaptureDevice *mic = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio]; NSError *error; _audioMicInput = [AVCaptureDeviceInput deviceInputWithDevice:mic error:&error]; if (error) { NSLog(@"获取麦克风失败~"); } } return _audioMicInput; } - (AVCaptureAudioDataOutput *)audioOutput { if (!_audioOutput) { //添加音频输出 _audioOutput = [[AVCaptureAudioDataOutput alloc] init]; [_audioOutput setSampleBufferDelegate:self queue:self.audioCaptureQueue]; } return _audioOutput; } //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]; } -(BOOL)supportsAVCaptureSessionPreset:(BOOL)isFront { if (isFront) { return [self.frontCameraInput.device supportsAVCaptureSessionPreset:_mSessionPreset]; }else { return [self.backCameraInput.device supportsAVCaptureSessionPreset:_mSessionPreset]; } } //切换前后置摄像头 -(void)changeCameraInputDeviceisFront:(BOOL)isFront { [self.captureSession stopRunning]; if (isFront) { [self.captureSession removeInput:self.backCameraInput]; if ([self.captureSession canAddInput:self.frontCameraInput]) { [self.captureSession addInput:self.frontCameraInput]; [[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceSubjectAreaDidChangeNotification object:self.camera]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(subjectAreaDidChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:_camera]; NSLog(@"前置添加监听----"); } self.cameraPosition = AVCaptureDevicePositionFront; }else { [self.captureSession removeInput:self.frontCameraInput]; if ([self.captureSession canAddInput:self.backCameraInput]) { [self.captureSession addInput:self.backCameraInput]; [[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureDeviceSubjectAreaDidChangeNotification object:self.camera]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(subjectAreaDidChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:_camera]; NSLog(@"后置添加监听----"); } self.cameraPosition = AVCaptureDevicePositionBack; } AVCaptureDeviceInput *deviceInput = isFront ? self.frontCameraInput:self.backCameraInput; [self.captureSession beginConfiguration]; // the session to which the receiver's AVCaptureDeviceInput is added. if ( [deviceInput.device lockForConfiguration:NULL] ) { [deviceInput.device setActiveVideoMinFrameDuration:CMTimeMake(1, 30)]; [deviceInput.device unlockForConfiguration]; } [self.captureSession commitConfiguration]; self.videoConnection.videoOrientation = AVCaptureVideoOrientationPortrait; if (self.videoConnection.supportsVideoMirroring) { self.videoConnection.videoMirrored = isFront; } /* 与标准视频稳定相比，这种稳定方法减少了摄像机的视野，在视频捕获管道中引入了更多的延迟，并消耗了更多的系统内存 */ if(self.videoConnection.supportsVideoStabilization && !isFront) {//前置保持大视野，关闭防抖 self.videoConnection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeStandard; NSLog(@"activeVideoStabilizationMode = %ld",(long)self.videoConnection.activeVideoStabilizationMode); }else { NSLog(@"connection don't support video stabilization"); self.videoConnection.preferredVideoStabilizationMode = AVCaptureVideoStabilizationModeOff; } [self.captureSession startRunning]; } //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; if (@available(iOS 10.2, *)) { AVCaptureDevice* newDevice = [AVCaptureDevice defaultDeviceWithDeviceType:AVCaptureDeviceTypeBuiltInDualCamera mediaType:AVMediaTypeVideo position:position]; if(!newDevice){ newDevice = [AVCaptureDevice defaultDeviceWithDeviceType:AVCaptureDeviceTypeBuiltInWideAngleCamera mediaType:AVMediaTypeVideo position:position]; } return newDevice; }else{ //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; } } - (AVCaptureDevice *)camera { if (!_camera) { NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; for (AVCaptureDevice *device in devices) { if ([device position] == self.cameraPosition) { _camera = device; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(subjectAreaDidChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:_camera]; } } } return _camera; } - (AVCaptureVideoDataOutput *)videoOutput { if (!_videoOutput) { //输出 _videoOutput = [[AVCaptureVideoDataOutput alloc] init]; [_videoOutput setAlwaysDiscardsLateVideoFrames:YES]; [_videoOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:_captureFormat] forKey:(id)kCVPixelBufferPixelFormatTypeKey]]; [_videoOutput setSampleBufferDelegate:self queue:self.videoCaptureQueue]; } return _videoOutput; } //视频采集队列 - (dispatch_queue_t)videoCaptureQueue { if (_videoCaptureQueue == nil) { // _videoCaptureQueue = dispatch_queue_create("com.faceunity.videoCaptureQueue", NULL); _videoCaptureQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0); } return _videoCaptureQueue; } //音频采集队列 - (dispatch_queue_t)audioCaptureQueue { if (_audioCaptureQueue == nil) { _audioCaptureQueue = dispatch_queue_create("com.faceunity.audioCaptureQueue", NULL); } return _audioCaptureQueue; } //视频连接 - (AVCaptureConnection *)videoConnection { _videoConnection = [self.videoOutput connectionWithMediaType:AVMediaTypeVideo]; _videoConnection.automaticallyAdjustsVideoMirroring = NO; return _videoConnection; } //设置采集格式 - (void)setCaptureFormat:(int)captureFormat { if (_captureFormat == captureFormat) { return; } _captureFormat = captureFormat; if (((NSNumber *)[[_videoOutput videoSettings] objectForKey:(id)kCVPixelBufferPixelFormatTypeKey]).intValue != captureFormat) { [_videoOutput setVideoSettings:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:_captureFormat] forKey:(id)kCVPixelBufferPixelFormatTypeKey]]; if ([self.camera lockForConfiguration:nil]){ [self.camera setExposureMode:AVCaptureExposureModeContinuousAutoExposure]; [self.camera unlockForConfiguration]; } } } /** * 切换回连续对焦和曝光模式 * 中心店对焦和曝光(centerPoint) */ - (void)resetFocusAndExposureModes { AVCaptureFocusMode focusMode = AVCaptureFocusModeContinuousAutoFocus; BOOL canResetFocus = [self.camera isFocusPointOfInterestSupported] && [self.camera isFocusModeSupported:focusMode]; AVCaptureExposureMode exposureMode = AVCaptureExposureModeContinuousAutoExposure; BOOL canResetExposure = [self.camera isExposurePointOfInterestSupported] && [self.camera isExposureModeSupported:exposureMode]; CGPoint centerPoint = CGPointMake(0.5f, 0.5f); NSError *error; if ([self.camera lockForConfiguration:&error]) { if (canResetFocus) { self.camera.focusMode = focusMode; self.camera.focusPointOfInterest = centerPoint; } if (canResetExposure) { self.camera.exposureMode = exposureMode; self.camera.exposurePointOfInterest = centerPoint; } [self.camera unlockForConfiguration]; } else { NSLog(@"%@",error); } } - (void)subjectAreaDidChange:(NSNotification *)notification { dispatch_async(self.videoCaptureQueue, ^{ CGPoint devicePoint = CGPointMake(0.5, 0.5); [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposeWithMode:AVCaptureExposureModeContinuousAutoExposure atDevicePoint:devicePoint monitorSubjectAreaChange:YES]; [self cameraChangeModle:FUCameraModelAutoFace]; }); } #pragma mark - 曝光补偿 - (void)setExposureValue:(float)value { // NSLog(@"camera----曝光值----%lf",value); NSError *error; if ([self.camera lockForConfiguration:&error]){ [self.camera setExposureMode:AVCaptureExposureModeContinuousAutoExposure]; [self.camera setExposureTargetBias:value completionHandler:nil]; [self.camera unlockForConfiguration]; }else{ } } #pragma mark - 分辨率 -(BOOL)changeSessionPreset:(AVCaptureSessionPreset)sessionPreset{ if ([self.captureSession canSetSessionPreset:sessionPreset]) { if ([self.captureSession isRunning]) { [self.captureSession stopRunning]; } _captureSession.sessionPreset = sessionPreset; _mSessionPreset = sessionPreset; [self.captureSession startRunning]; return YES; } return NO; } #pragma mark - 镜像 -(void)changeVideoMirrored:(BOOL)videoMirrored{ if (self.videoConnection.supportsVideoMirroring) { self.videoConnection.videoMirrored = videoMirrored; } } #pragma mark - 帧率 -(void)changeVideoFrameRate:(int)frameRate{ if (frameRate <= 30) {//此方法可以设置相机帧率,仅支持帧率小于等于30帧. AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; [videoDevice lockForConfiguration:NULL]; [videoDevice setActiveVideoMinFrameDuration:CMTimeMake(10, frameRate * 10)]; [videoDevice setActiveVideoMaxFrameDuration:CMTimeMake(10, frameRate * 10)]; [videoDevice unlockForConfiguration]; return; } AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; for(AVCaptureDeviceFormat *vFormat in [videoDevice formats] ) { CMFormatDescriptionRef description= vFormat.formatDescription; float maxRate = ((AVFrameRateRange*) [vFormat.videoSupportedFrameRateRanges objectAtIndex:0]).maxFrameRate; if (maxRate > frameRate - 1 && CMFormatDescriptionGetMediaSubType(description)==kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) { if ([videoDevice lockForConfiguration:nil]) { /* 设置分辨率的方法activeFormat与sessionPreset是互斥的 */ videoDevice.activeFormat = vFormat; [videoDevice setActiveVideoMinFrameDuration:CMTimeMake(10, frameRate * 10)]; [videoDevice setActiveVideoMaxFrameDuration:CMTimeMake(10, frameRate * 10)]; [videoDevice unlockForConfiguration]; break; } } } } - (BOOL)focusPointSupported { return self.camera.focusPointOfInterestSupported; } - (BOOL)exposurePointSupported { return self.camera.exposurePointOfInterestSupported; } - (BOOL)isFrontCamera { return self.cameraPosition == AVCaptureDevicePositionFront; } - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{ if (captureOutput == self.audioOutput) { if (runMode == VideoRecordMode) { if (self.recordEncoder == nil) { return ; } CFRetain(sampleBuffer); // 进行数据编码 [self.recordEncoder encodeFrame:sampleBuffer isVideo:NO]; CFRelease(sampleBuffer); } return ; } if([self.delegate respondsToSelector:@selector(didOutputVideoSampleBuffer:)]) { [self.delegate didOutputVideoSampleBuffer:sampleBuffer]; } /* 人脸对焦判断 */ [self cameraFocusAndExpose]; switch (runMode) { case CommonMode: break; case PhotoTakeMode: { runMode = CommonMode; CVPixelBufferRef buffer = CMSampleBufferGetImageBuffer(sampleBuffer); UIImage *image = [self imageFromPixelBuffer:buffer]; if (image) { UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL); } } break; case VideoRecordMode: if (self.recordEncoder == nil) { NSDate *currentDate = [NSDate date];//获取当前时间，日期 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"YYYYMMddhhmmssSS"]; NSString *dateString = [dateFormatter stringFromDate:currentDate]; NSString *videoPath = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4",dateString]]; CVPixelBufferRef buffer = CMSampleBufferGetImageBuffer(sampleBuffer); float frameWidth = CVPixelBufferGetWidth(buffer); float frameHeight = CVPixelBufferGetHeight(buffer); if (frameWidth != 0 && frameHeight != 0) { self.recordEncoder = [FURecordEncoder encoderForPath:videoPath Height:frameHeight width:frameWidth channels:1 samples:44100]; return ; } } CFRetain(sampleBuffer); // 进行数据编码 [self.recordEncoder encodeFrame:sampleBuffer isVideo:YES]; CFRelease(sampleBuffer); break; case VideoRecordEndMode: { runMode = CommonMode; // if (self.recordEncoder.writer.status == AVAssetWriterStatusUnknown) { // self.recordEncoder = nil; // }else{ __weak typeof(self)weakSelf = self ; [self.recordEncoder finishWithCompletionHandler:^{ [weakSelf videpCompleted]; }]; } break; default: break; } } #pragma mark - 人脸曝光逻辑 -(void)cameraFocusAndExpose{ if (_cameraFocusModel == FUCameraModelAutoFace) { if ([self.dataSource respondsToSelector:@selector(faceCenterInImage:)]) { CGPoint center = [self.dataSource faceCenterInImage:self]; if (center.y >= 0) { [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposeWithMode:AVCaptureExposureModeContinuousAutoExposure atDevicePoint:center monitorSubjectAreaChange:YES]; }else{ [self focusWithMode:AVCaptureFocusModeContinuousAutoFocus exposeWithMode:AVCaptureExposureModeContinuousAutoExposure atDevicePoint:CGPointMake(0.5, 0.5) monitorSubjectAreaChange:YES]; } } } } -(void)videpCompleted{ NSLog(@"1111"); NSString *path = self.recordEncoder.path; self.recordEncoder = nil; if (self.recordVidepCompleted) { self.recordVidepCompleted(path); } } - (void)takePhotoAndSave { runMode = PhotoTakeMode; } //开始录像 - (void)startRecord { runMode = VideoRecordMode; } //停止录像 - (void)stopRecordWithCompletionHandler:(void (^)(NSString *videoPath))handler { self.recordVidepCompleted = handler; runMode = VideoRecordEndMode; } - (UIImage *)imageFromPixelBuffer:(CVPixelBufferRef)pixelBufferRef { CVPixelBufferLockBaseAddress(pixelBufferRef, 0); CGFloat SW = [UIScreen mainScreen].bounds.size.width; CGFloat SH = [UIScreen mainScreen].bounds.size.height; float width = CVPixelBufferGetWidth(pixelBufferRef); float height = CVPixelBufferGetHeight(pixelBufferRef); float dw = width / SW; float dh = height / SH; float cropW = width; float cropH = height; if (dw > dh) { cropW = SW * dh; }else { cropH = SH * dw; } CGFloat cropX = (width - cropW) * 0.5; CGFloat cropY = (height - cropH) * 0.5; CIImage *ciImage = [CIImage imageWithCVPixelBuffer:pixelBufferRef]; CIContext *temporaryContext = [CIContext contextWithOptions:nil]; CGImageRef videoImage = [temporaryContext createCGImage:ciImage fromRect:CGRectMake(cropX, cropY, cropW, cropH)]; UIImage *image = [UIImage imageWithCGImage:videoImage]; CGImageRelease(videoImage); CVPixelBufferUnlockBaseAddress(pixelBufferRef, 0); return image; } - (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo { if(error != NULL){ [SVProgressHUD showErrorWithStatus:@"保存图片失败"]; }else{ [SVProgressHUD showSuccessWithStatus:@"图片已保存到相册"]; } } - (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { if(error != NULL){ [SVProgressHUD showErrorWithStatus:@"保存视频失败"]; }else{ [SVProgressHUD showSuccessWithStatus:@"视频已保存到相册"]; } } - (void)setCaptureVideoOrientation:(AVCaptureVideoOrientation) orientation { [self.videoConnection setVideoOrientation:orientation]; } - (void)getCurrentExposureValue:(float *)current max:(float *)max min:(float *)min{ *min = self.camera.minExposureTargetBias; *max = self.camera.maxExposureTargetBias; *current = self.camera.exposureTargetBias; } - (void)focusWithMode:(AVCaptureFocusMode)focusMode exposeWithMode:(AVCaptureExposureMode)exposureMode atDevicePoint:(CGPoint)point monitorSubjectAreaChange:(BOOL)monitorSubjectAreaChange { dispatch_async(self.videoCaptureQueue, ^{ AVCaptureDevice *device = self.camera; NSError *error = nil; if ( [device lockForConfiguration:&error] ) { // Setting (focus/exposure)PointOfInterest alone does not initiate a (focus/exposure) operation. // Call -set(Focus/Exposure)Mode: to apply the new point of interest. if ( device.isFocusPointOfInterestSupported && [device isFocusModeSupported:focusMode] ) { device.focusPointOfInterest = point; device.focusMode = focusMode; } if ( device.isExposurePointOfInterestSupported && [device isExposureModeSupported:exposureMode] ) { device.exposurePointOfInterest = point; device.exposureMode = exposureMode; } // NSLog(@"---point --%@",NSStringFromCGPoint(point)); device.subjectAreaChangeMonitoringEnabled = monitorSubjectAreaChange; [device unlockForConfiguration]; } else { NSLog( @"Could not lock device for configuration: %@", error ); } }); } -(void)cameraChangeModle:(FUCameraFocusModel)modle { _cameraFocusModel = modle; } //缩放 - (CGFloat)maxZoomFactor { return MIN(self.camera.activeFormat.videoMaxZoomFactor, 4.0f); } - (void)setZoomValue:(CGFloat)zoomValue { if (!self.camera.isRampingVideoZoom) { NSError *error; if ([self.camera lockForConfiguration:&error]) { CGFloat zoomFactor = pow([self maxZoomFactor], zoomValue); self.camera.videoZoomFactor = zoomFactor; [self.camera unlockForConfiguration]; } } } - (void)dealloc{ [[NSNotificationCenter defaultCenter] removeObserver:self]; NSLog(@"camera dealloc"); } @end