GPUImage 實現(xiàn)自定義相機

前言

這是基于第三方庫GPUImage實現(xiàn)的自定義相機瑰谜，主要是功能方面的實現(xiàn),在UI上暫時并沒有做很好的完善。主要包括功能有實時濾鏡树绩，準確聚焦萨脑，調(diào)整焦距，調(diào)整曝光饺饭，閃光燈設置渤早，翻轉(zhuǎn)前后相機以及拍照后的濾鏡調(diào)整等

引入GPUImage庫

主要有工程以依賴的形式加入GPUImage或者用Pod安裝GPUImage的方法，網(wǎng)上類似教程很多砰奕，這里就不贅述了

制作自定義相機

新建一個CameraViewController,作為實時相機界面的Controller,并且做以下預處理及聲明變量

#define HEIGHT 667.0
#define WIDTH 375.0
static int CameraFilterCount = 9;//濾鏡的數(shù)量

///濾鏡View的顯示狀態(tài)
typedef NS_ENUM(NSInteger, FilterViewState) {
    
    FilterViewHidden,/**<隱藏*/
    
    FilterViewUsing /**<顯示*/
};

///閃光燈狀態(tài)
typedef NS_ENUM(NSInteger, CameraManagerFlashMode) {
    
    CameraManagerFlashModeAuto, /**<自動*/
    
    CameraManagerFlashModeOff, /**<關閉*/
    
    CameraManagerFlashModeOn /**<打開*/
};

@interface CameraViewController() <UIGestureRecognizerDelegate>
{
    CALayer *_focusLayer; //聚焦層
}

///新建相機cameraManager
@property (nonatomic,strong) GPUImageStillCamera *cameraManager;

/**
*根據(jù)storyboard上將界面分為三個View蛛芥，預覽View，底部View以及整體的cameraView,也可以用代碼實現(xiàn)
*/
@property (strong, nonatomic) IBOutlet UIView *cameraView;
@property (weak, nonatomic) IBOutlet UIView *preview;
@property (weak, nonatomic) IBOutlet UIView *bottomView;

@property CameraFilterView *cameraFilterView;//自定義濾鏡視圖

@property (nonatomic , assign) CameraManagerFlashMode flashMode;
@property (nonatomic , assign) FilterViewState filterViewState;

@property (nonatomic , weak) IBOutlet UIButton *flashButton;//閃光燈按鈕

@property (nonatomic , assign) CGFloat beginGestureScale;//開始的縮放比例
@property (nonatomic , assign) CGFloat effectiveScale;//最后的縮放比例

@property GPUImageOutput *filter;//濾鏡
@property GPUImageView *filterView;//實時濾鏡預覽視圖
@property AVCaptureStillImageOutput *photoOutput;//用于保存原圖

@property CheckViewController *checkVC;//拍照之后跳轉(zhuǎn)的ViewController
@end

控制器視圖方法

- (void)viewDidLoad{
//隱藏導航欄
    [self.navigationController setNavigationBarHidden:YES];
//從SB初始化CheckController军援，后續(xù)解釋FilterCode
    _checkVC = [[self storyboard] instantiateViewControllerWithIdentifier:@"Check"];
    [_checkVC setFilterCode:0];

//初始化相機仅淑，默認為前置相機
    _cameraManager = [[MyCamera alloc] initWithSessionPreset:AVCaptureSessionPresetPhoto cameraPosition:AVCaptureDevicePositionFront];
    _cameraManager.outputImageOrientation = UIInterfaceOrientationPortrait;//設置照片的方向為設備的定向
    _cameraManager.horizontallyMirrorFrontFacingCamera = YES;//設置是否為鏡像
    _cameraManager.horizontallyMirrorRearFacingCamera = NO;

    _filter = [[GPUImageFilter alloc] init];//初始化濾鏡，默認初始化為原圖GPUImageFilter

    [self setfocusImage:[UIImage imageNamed:@"touch_focus_x"]];//初始化聚焦圖片
/**
*設置cameraManager的輸出對象為filter,然后將preview強制轉(zhuǎn)換為filterView添加到filter的輸出對象中胸哥，這樣在filterView中顯示的就是相機捕捉到的并且經(jīng)過filter濾鏡處理的實時圖像了
*/
    [self.cameraManager addTarget:_filter];
    _filterView = (GPUImageView *)self.preview;
    [_filter addTarget:_filterView];

//初始化閃光燈模式為Auto
    [self setFlashMode:CameraManagerFlashModeAuto];
//默認濾鏡視圖為隱藏涯竟，就是點擊濾鏡的按鈕才會出現(xiàn)讓你選擇濾鏡的那個小視圖
    [self setFilterViewState:FilterViewHidden];
//初始化開始及結(jié)束的縮放比例都為1.0
    [self setBeginGestureScale:1.0f];
    [self setEffectiveScale:1.0f];
 //啟動相機捕獲
    [self.cameraManager startCameraCapture];}

UI方法

這里先給出CameraFilterView的實現(xiàn)方法，其實就是一個簡單的一行的CollectionView空厌，博主比較懶庐船，引用了ShawnDu大哥的代碼，在此表示感謝??

///.h文件
#import <UIKit/UIKit.h>

@protocol CameraFilterViewDelegate;

@interface CameraFilterView : UICollectionView <UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout>

@property (strong, nonatomic) NSMutableArray *picArray;//圖片數(shù)組
@property (strong, nonatomic) id <CameraFilterViewDelegate> cameraFilterDelegate;
@end

@protocol CameraFilterViewDelegate <NSObject>

- (void)switchCameraFilter:(NSInteger)index;//濾鏡選擇方法

@end

\\\.m文件
#import "CameraFilterView.h"
static const float CELL_HEIGHT = 84.0f;
static const float CELL_WIDTH = 56.0f;
@implementation CameraFilterView

#pragma mark 初始化方法

- (id)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout{
    self = [super initWithFrame:frame collectionViewLayout:layout];
    if (self) {
        self.delegate = self;
        self.dataSource = self;
    }
    return self;
}

#pragma mark collection 方法
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    return [_picArray count];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *identifier = @"cameraFilterCellID";
    [collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:identifier];
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, CELL_WIDTH, CELL_HEIGHT)];
    imageView.image = [_picArray objectAtIndex:indexPath.row];
    [cell addSubview:imageView];
    cell.backgroundColor = [UIColor whiteColor];
    
    return cell;
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
    return CGSizeMake(CELL_WIDTH, CELL_HEIGHT);
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    [_cameraFilterDelegate switchCameraFilter:indexPath.row];
}

-(BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}
@end

關于Collection控件不懂的同學可以先復習一下CollectionView或者用其他的方法實現(xiàn)自定義控件

//添加濾鏡視圖到主視圖上
- (void)addCameraFilterView {
    UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
    layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
    _cameraFilterView = [[CameraFilterView alloc] initWithFrame:CGRectMake(0, HEIGHT - _bottomView.frame.size.height - (WIDTH-4)/5 - 4, WIDTH, (WIDTH-4)/5) collectionViewLayout:layout];
    NSMutableArray *filterNameArray = [[NSMutableArray alloc] initWithCapacity:CameraFilterCount];
    for (NSInteger index = 0; index < CameraFilterCount; index++) {
        UIImage *image = [UIImage imageNamed:@"girl"];
        [filterNameArray addObject:image];
    }
    _cameraFilterView.cameraFilterDelegate = self;
    _cameraFilterView.picArray = filterNameArray;
    [self.view addSubview:_cameraFilterView];
}

//使用濾鏡
- (IBAction)useFilter:(id)sender {
    if (self.filterViewState == FilterViewHidden) {
        [self addCameraFilterView];
        [self setFilterViewState:FilterViewUsing];
    }
    else {
        [_cameraFilterView removeFromSuperview];
        [self setFilterViewState:FilterViewHidden];
    }
}

//設置聚焦圖片
- (void)setfocusImage:(UIImage *)focusImage {
    if (!focusImage) return;
    
    if (!_focusLayer) {
    //增加tap手勢嘲更，用于聚焦及曝光
        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(focus:)];
        [self.preview addGestureRecognizer:tap];
     //增加pinch手勢筐钟，用于調(diào)整焦距   
        UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(focusDisdance:)];
        [self.preview addGestureRecognizer:pinch];
        pinch.delegate = self;
    }

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, focusImage.size.width, focusImage.size.height)];
    imageView.image = focusImage;
    CALayer *layer = imageView.layer;
    layer.hidden = YES;
    [self.preview.layer addSublayer:layer];
    _focusLayer = layer;

}

//點擊閃光燈按鈕
- (IBAction)changeFlash:(id)sender {
    [self changeFlashMode:_flashButton];
}

濾鏡選擇方法的實現(xiàn)

/**
*以下的濾鏡是GPUImage自帶的濾鏡，后面有幾個效果不是很明顯赋朦，我只是拿來做測試用篓冲。
*GPUImage自帶的濾鏡很多李破，大家可以都試試看，當然也可以自己寫濾鏡壹将，這就需要后續(xù)深入學習了
*對checkViewController中filtercode屬性的說明：filtercode是在選擇濾鏡的時候設置嗤攻，
*在拍照的時候傳值給CheckViewController，實際上拍照傳遞給CheckVC的是原圖加上當前設置的filtercode诽俯，
*所以在后續(xù)CheckVC中改變?yōu)V鏡的時候是基于原圖進行改變妇菱。
*/
- (void)switchCameraFilter:(NSInteger)index {
    [self.cameraManager removeAllTargets];
    switch (index) {
        case 0:
            _filter = [[GPUImageFilter alloc] init];//原圖
            [_checkVC setFilterCode:0];
            break;
        case 1:
            _filter = [[GPUImageHueFilter alloc] init];//綠巨人
            [_checkVC setFilterCode:1];
            break;
        case 2:
            _filter = [[GPUImageColorInvertFilter alloc] init];//負片
            [_checkVC setFilterCode:2];
            break;
        case 3:
            _filter = [[GPUImageSepiaFilter alloc] init];//老照片
            [_checkVC setFilterCode:3];
            break;
        case 4: {
            _filter = [[GPUImageGaussianBlurPositionFilter alloc] init];
            [(GPUImageGaussianBlurPositionFilter*)_filter setBlurRadius:40.0/320.0];
            [_checkVC setFilterCode:4];
        }
            break;
        case 5:
            _filter = [[GPUImageSketchFilter alloc] init];//素描
            [_checkVC setFilterCode:5];
            break;
        case 6:
            _filter = [[GPUImageVignetteFilter alloc] init];//黑暈
            [_checkVC setFilterCode:6];
            break;
        case 7:
            _filter = [[GPUImageGrayscaleFilter alloc] init];//灰度
            [_checkVC setFilterCode:7];
            break;
        case 8:
            _filter = [[GPUImageToonFilter alloc] init];//卡通效果 黑色粗線描邊
            [_checkVC setFilterCode:8];
        default:
            _filter = [[GPUImageFilter alloc] init];
            [_checkVC setFilterCode:9];
            break;
    }
    
    [self.cameraManager addTarget:_filter];
    [_filter addTarget:_filterView];
}

拍照方法的實現(xiàn)

- (IBAction)takePhoto:(id)sender {
    _photoOutput = [_cameraManager getPhotoOutput];//得到源數(shù)據(jù)輸出流
    NSDictionary * outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:AVVideoCodecJPEG,AVVideoCodecKey, nil];
    //這是輸出流的設置參數(shù)AVVideoCodecJPEG參數(shù)表示以JPEG的圖片格式輸出圖片
    [_photoOutput setOutputSettings:outputSettings];
    AVCaptureConnection *captureConnection=[_photoOutput connectionWithMediaType:AVMediaTypeVideo];
    //根據(jù)連接取得設備輸出的數(shù)據(jù)
    [_photoOutput captureStillImageAsynchronouslyFromConnection:captureConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
        if (imageDataSampleBuffer) {
            NSData *imageData=[AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
            UIImage *image=[UIImage imageWithData:imageData];
//將輸出流數(shù)據(jù)轉(zhuǎn)換成NSData，然后通過NSData將數(shù)據(jù)轉(zhuǎn)換為UIImage傳遞給checkVC
            _checkVC.image = image;
            [self.navigationController pushViewController:_checkVC animated:YES];
        }  
    }];
}

轉(zhuǎn)置攝像頭

#pragma mark 轉(zhuǎn)置攝像頭

- (IBAction)turn:(id)sender {
    [self.cameraManager stopCameraCapture];
    if (_cameraManager.cameraPosition == AVCaptureDevicePositionFront) {
        [_cameraManager initWithSessionPreset:AVCaptureSessionPresetPhoto cameraPosition:AVCaptureDevicePositionBack];
    }
    else if(_cameraManager.cameraPosition == AVCaptureDevicePositionBack)
    {
        [_cameraManager initWithSessionPreset:AVCaptureSessionPresetPhoto cameraPosition:AVCaptureDevicePositionFront];
    }
    _cameraManager.outputImageOrientation = UIInterfaceOrientationPortrait;
    _cameraManager.horizontallyMirrorFrontFacingCamera = YES;
    _cameraManager.horizontallyMirrorRearFacingCamera = NO;
    
    [self.cameraManager addTarget:_filter];
    _filterView = (GPUImageView *)self.preview;
    [_filter addTarget:_filterView];
    
    [self setBeginGestureScale:1.0f];//在轉(zhuǎn)換攝像頭的時候把攝像頭的焦距調(diào)回1.0
    [self setEffectiveScale:1.0f];
    
    [self.cameraManager startCameraCapture];
}

調(diào)整焦距

//調(diào)整焦距方法
-(void)focusDisdance:(UIPinchGestureRecognizer*)pinch {
     self.effectiveScale = self.beginGestureScale * pinch.scale;
    if (self.effectiveScale < 1.0f) {
        self.effectiveScale = 1.0f;
    }
    CGFloat maxScaleAndCropFactor = 3.0f;//設置最大放大倍數(shù)為3倍
    if (self.effectiveScale > maxScaleAndCropFactor)
        self.effectiveScale = maxScaleAndCropFactor;
    [CATransaction begin];
    [CATransaction setAnimationDuration:.025];
    NSError *error;
    if([self.cameraManager.inputCamera lockForConfiguration:&error]){
        [self.cameraManager.inputCamera setVideoZoomFactor:self.effectiveScale];
        [self.cameraManager.inputCamera unlockForConfiguration];
    }
    else {
        NSLog(@"ERROR = %@", error);
    }
    
    [CATransaction commit];
}

//手勢代理方法
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    if ( [gestureRecognizer isKindOfClass:[UIPinchGestureRecognizer class]] ) {
        self.beginGestureScale = self.effectiveScale;
    }
    return YES;
}

對焦

//對焦方法
- (void)focus:(UITapGestureRecognizer *)tap {
    self.preview.userInteractionEnabled = NO;
    CGPoint touchPoint = [tap locationInView:tap.view];
   // CGContextRef *touchContext = UIGraphicsGetCurrentContext();
    [self layerAnimationWithPoint:touchPoint];
/**
*下面是照相機焦點坐標軸和屏幕坐標軸的映射問題暴区，這個坑困惑了我好久闯团，花了各種方案來解決這個問題，以下是最簡單的解決方案也是最準確的坐標轉(zhuǎn)換方式
*/
    if(_cameraManager.cameraPosition == AVCaptureDevicePositionBack){
        touchPoint = CGPointMake( touchPoint.y /tap.view.bounds.size.height ,1-touchPoint.x/tap.view.bounds.size.width);
    }
    else
        touchPoint = CGPointMake(touchPoint.y /tap.view.bounds.size.height ,touchPoint.x/tap.view.bounds.size.width);
/*以下是相機的聚焦和曝光設置颜启，前置不支持聚焦但是可以曝光處理偷俭，后置相機兩者都支持，下面的方法是通過點擊一個點同時設置聚焦和曝光缰盏，當然根據(jù)需要也可以分開進行處理
*/
    if([self.cameraManager.inputCamera isExposurePointOfInterestSupported] && [self.cameraManager.inputCamera isExposureModeSupported:AVCaptureExposureModeContinuousAutoExposure])
    {
        NSError *error;
        if ([self.cameraManager.inputCamera lockForConfiguration:&error]) {
        [self.cameraManager.inputCamera setExposurePointOfInterest:touchPoint];
        [self.cameraManager.inputCamera setExposureMode:AVCaptureExposureModeContinuousAutoExposure];
             if ([self.cameraManager.inputCamera isFocusPointOfInterestSupported] && [self.cameraManager.inputCamera isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
                 [self.cameraManager.inputCamera setFocusPointOfInterest:touchPoint];
                 [self.cameraManager.inputCamera setFocusMode:AVCaptureFocusModeAutoFocus];
             }
        [self.cameraManager.inputCamera unlockForConfiguration];
        } else {
            NSLog(@"ERROR = %@", error);
        }
    }
}

//對焦動畫
- (void)layerAnimationWithPoint:(CGPoint)point {
    if (_focusLayer) {
///聚焦點聚焦動畫設置
        CALayer *focusLayer = _focusLayer;
        focusLayer.hidden = NO;
        [CATransaction begin];
        [CATransaction setDisableActions:YES];
        [focusLayer setPosition:point];
        focusLayer.transform = CATransform3DMakeScale(2.0f,2.0f,1.0f);
        [CATransaction commit];
        
        CABasicAnimation *animation = [ CABasicAnimation animationWithKeyPath: @"transform" ];
        animation.toValue = [ NSValue valueWithCATransform3D: CATransform3DMakeScale(1.0f,1.0f,1.0f)];
        animation.delegate = self;
        animation.duration = 0.3f;
        animation.repeatCount = 1;
        animation.removedOnCompletion = NO;
        animation.fillMode = kCAFillModeForwards;
        [focusLayer addAnimation: animation forKey:@"animation"];
    }
}

//動畫的delegate方法
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag {
    //    1秒鐘延時
    [self performSelector:@selector(focusLayerNormal) withObject:self afterDelay:0.5f];
}

//focusLayer回到初始化狀態(tài)
- (void)focusLayerNormal {
    self.preview.userInteractionEnabled = YES;
    _focusLayer.hidden = YES;
}

閃光燈設置

//設置閃光燈模式

- (void)setFlashMode:(CameraManagerFlashMode)flashMode {
    _flashMode = flashMode;
    
    switch (flashMode) {
        case CameraManagerFlashModeAuto: {
            [self.cameraManager.inputCamera lockForConfiguration:nil];
            if ([self.cameraManager.inputCamera isFlashModeSupported:AVCaptureFlashModeAuto]) {
                 [self.cameraManager.inputCamera setFlashMode:AVCaptureFlashModeAuto];
            }
            [self.cameraManager.inputCamera unlockForConfiguration];
        }
            break;
        case CameraManagerFlashModeOff: {
            [self.cameraManager.inputCamera lockForConfiguration:nil];
            [self.cameraManager.inputCamera setFlashMode:AVCaptureFlashModeOff];
            [self.cameraManager.inputCamera unlockForConfiguration];
        }
            
            break;
        case CameraManagerFlashModeOn: {
            [self.cameraManager.inputCamera lockForConfiguration:nil];
            [self.cameraManager.inputCamera setFlashMode:AVCaptureFlashModeOn];
            [self.cameraManager.inputCamera unlockForConfiguration];
        }
            break;
            
        default:
            break;
    }
}


#pragma mark 改變閃光燈狀態(tài)
- (void)changeFlashMode:(UIButton *)button {
    switch (self.flashMode) {
        case CameraManagerFlashModeAuto:
            self.flashMode = CameraManagerFlashModeOn;
            [button setImage:[UIImage imageNamed:@"flashing_on"] forState:UIControlStateNormal];
            break;
        case CameraManagerFlashModeOff:
            self.flashMode = CameraManagerFlashModeAuto;
            [button setImage:[UIImage imageNamed:@"flashing_auto"] forState:UIControlStateNormal];
            break;
        case CameraManagerFlashModeOn:
            self.flashMode = CameraManagerFlashModeOff;
            [button setImage:[UIImage imageNamed:@"flashing_off"] forState:UIControlStateNormal];
            break;
            
        default:
            break;
    }
}

對拍照之后的照片進行濾鏡處理

這個其實很簡單涌萤，處理方案和之前的實時濾鏡差不多，也是通過FilterController來實現(xiàn)濾鏡的選擇口猜，下面就給出選擇濾鏡之后進行處理的函數(shù)

- (void)switchCameraFilter:(NSInteger)index {
    UIImage *inputImage = self.image;
    switch (index) {
        case 0:
            _filter = [[GPUImageFilter alloc] init];//原圖
            break;
        case 1:
            _filter = [[GPUImageHueFilter alloc] init];//綠巨人
            break;
        case 2:
            _filter = [[GPUImageColorInvertFilter alloc] init];//負片
            break;
        case 3:
            _filter = [[GPUImageSepiaFilter alloc] init];//老照片
            break;
        case 4: {
            _filter = [[GPUImageGaussianBlurPositionFilter alloc] init];
            [(GPUImageGaussianBlurPositionFilter*)_filter setBlurRadius:40.0/320.0];
        }
            break;
        case 5:
            _filter = [[GPUImageMedianFilter alloc] init];
            break;
        case 6:
            _filter = [[GPUImageVignetteFilter alloc] init];//黑暈
            break;
        case 7:
            _filter = [[GPUImageKuwaharaRadius3Filter alloc] init];
            break;
        case 8:
            _filter = [[GPUImageBilateralFilter alloc] init];
        default:
            _filter = [[GPUImageFilter alloc] init];
            break;
    }
    
    //到這里為止和實時濾鏡的處理都一樣负溪，不一樣的就只有下面幾句
    [_filter forceProcessingAtSize:inputImage.size];
    [_filter useNextFrameForImageCapture];
    
    GPUImagePicture *stillImageSource = [[GPUImagePicture alloc] initWithImage:inputImage smoothlyScaleOutput:YES];
    
    [stillImageSource addTarget:_filter];
    
    [stillImageSource processImage];
    
    _currentImage = [_filter imageFromCurrentFramebuffer];
//這里得到的currentImage就是添加了濾鏡之后的照片，可以放在imageView中直接顯示济炎，也可以稍加處理保存到相冊
    [self.imageView setImage:_currentImage];
}

總結(jié)

以上是最近在做自定義相機時做的一點總結(jié)川抡，之前在做的時候也查閱了很多文章，感覺相對比較分散须尚，所以這里就稍微做一下整理崖堤，希望大家在做類似需求的開發(fā)時能少碰到點坑。當然我做的也不怎么完善耐床，風格也比較雜亂密幔，后續(xù)會對此做些改進。
有什么不對的地方歡迎大家批評指正撩轰，共同學習

最后編輯于：2017.12.03 13:02:08

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城市分裂傳說
那天，我揣著相機與錄音快耿，去河邊找鬼囊陡。笑死，一個胖子當著我的面吹牛掀亥，可吹牛的內(nèi)容都是我干的撞反。我是一名探鬼主播，決...
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GPUImage 實現(xiàn)自定義相機

前言

引入GPUImage庫

制作自定義相機

新建一個CameraViewController,作為實時相機界面的Controller,并且做以下預處理及聲明變量

控制器視圖方法

UI方法

濾鏡選擇方法的實現(xiàn)

拍照方法的實現(xiàn)

轉(zhuǎn)置攝像頭

調(diào)整焦距

對焦

閃光燈設置

對拍照之后的照片進行濾鏡處理

總結(jié)

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