GPUIMAGE中GPUImageStillCamera可以調(diào)用系統(tǒng)相機(jī)，并實(shí)現(xiàn)實(shí)時(shí)濾鏡，但是我沒有找到相機(jī)全屏的方法，望知道的說一下

GPUImageStillCamera繼承自GPUImageVideoCamera類，添加了捕獲照片的功能。

GPUImageVideoCamera

初始化方法：

- (id)initWithSessionPreset:(NSString *)sessionPreset cameraPosition:(AVCaptureDevicePosition)cameraPosition

sessionPreset是相機(jī)拍攝時(shí)的分辨率。它的值如下

AVCaptureSessionPresetPhoto AVCaptureSessionPresetHigh AVCaptureSessionPresetMedium AVCaptureSessionPresetLow AVCaptureSessionPreset320x240 AVCaptureSessionPreset352x288 AVCaptureSessionPreset640x480 AVCaptureSessionPreset960x540 AVCaptureSessionPreset1280x720 AVCaptureSessionPreset1920x1080 AVCaptureSessionPreset3840x2160 AVCaptureSessionPresetiFrame960x540 AVCaptureSessionPresetiFrame1280x720 AVCaptureSessionPresetInputPriority

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cameraPosition相機(jī)設(shè)備，分為前后?

AVCaptureDevicePositionFront AVCaptureDevicePositionBack

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- (void)startCameraCapture;開始捕獲

- (void)stopCameraCapture;停止捕獲

- (void)rotateCamera;切換前后攝像頭

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　　添加實(shí)時(shí)濾鏡

定義GPUImageStillCamera對象

mCamera = [[GPUImageStillCamera alloc] initWithSessionPreset:AVCaptureSessionPresetPhoto cameraPosition:AVCaptureDevicePositionBack];_isBack = YES; // _mCamera.horizontallyMirrorRearFacingCamera = NO; // _mCamera.horizontallyMirrorFrontFacingCamera = YES;_mCamera.outputImageOrientation = UIInterfaceOrientationPortrait;

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定義要應(yīng)用的濾鏡

_mFilter = [[FWAmaroFilter alloc] init];

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?定義GPUImageView對象，將GPUImageStillCamera對象捕獲的圖像打印在GPUImageView的層。

_mGPUImgView = [[GPUImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 426)];

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添加濾鏡

[_mCamera addTarget:_mFilter];

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添加顯示

[_mFilter addTarget:_mGPUImgView];

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開始捕獲

[_mCamera startCameraCapture];

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[self.view addSubview:_mGPUImgView];

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到此為止。實(shí)時(shí)濾鏡已經(jīng)實(shí)現(xiàn)

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實(shí)現(xiàn)拍照

-(void)takePhoto{[_mCamera capturePhotoAsJPEGProcessedUpToFilter:_mFilter withCompletionHandler:^(NSData *processedJPEG, NSError *error){[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{[[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:processedJPEG options:nil];} completionHandler:^(BOOL success, NSError * _Nullable error) {}];}]; }

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