ios - 这是OC版实时人脸检测的代码，今天写了一天了，不知道为什么没成功？

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{代码...}

怪我咯 · Answer

我在各种社区寻求帮助最终搞定了，这是全部代码，有些不需要的可以删掉，关键代码还是sampletoimage的方法和capturoutput的方法。

#import "ViewController.h"
#import 
#import "FaceppLocalDetectorSDK/FaceppLocalDetector.h"
#import "FaceppSDK_ARC/FaceppAPI.h"

@interface ViewController (){
    AVCaptureSession *captureSession;
    AVCaptureDevice *captureDevice;
    AVCaptureVideoPreviewLayer *previewLayer;
    FaceppLocalDetector *detector;
    UIImage *resultImage;
    UIImage *sample;
    BOOL isStart;
    
    UIImageView *screenShot;
    UIButton *photo;
    UIImageView *ok;
    UIImageView *circle;
    UIImageView *person;
    BOOL getSample;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    getSample = NO;
    sample = [[UIImage alloc]init];
    [self initLocalDetector];
    isStart = NO;
    [self isStartTrue];
    
    captureSession = [[AVCaptureSession alloc]init];
    captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    captureSession.sessionPreset = AVCaptureSessionPresetMedium;
    
    NSArray *devices = [[NSArray alloc]init];
    devices = [AVCaptureDevice devices];
    for (AVCaptureDevice *device in devices) {
        if ([device hasMediaType:AVMediaTypeVideo]) {
            if (device.position == AVCaptureDevicePositionFront) {
                captureDevice = device;
                if (captureDevice != nil) {
                    NSLog(@"Capture Device found");
                    [self beginSession];
                }
            }
        }
    }
    [self initUI];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)initLocalDetector {
    NSDictionary *option = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSNumber numberWithBool:NO],[NSNumber numberWithInt:20],FaceppDetectorAccuracyHigh, nil] forKeys:[NSArray arrayWithObjects:FaceppDetectorTracking,FaceppDetectorMinFaceSize,FaceppDetectorAccuracy, nil]];
    detector = [FaceppLocalDetector detectorOfOptions:option andAPIKey:@"8577edf0b2176bd9964fdfa8c9203659"];
    
}

-(void) isStartTrue {
    isStart = YES;
}

-(void)beginSession {
    AVCaptureDeviceInput *captureDeviceInput = [[AVCaptureDeviceInput alloc]initWithDevice:captureDevice error:nil];
    [captureSession addInput:captureDeviceInput];
    AVCaptureVideoDataOutput *output = [[AVCaptureVideoDataOutput alloc]init];
    dispatch_queue_t cameraQueue;
    cameraQueue = dispatch_queue_create("cameraQueue", DISPATCH_QUEUE_SERIAL);
    [output setSampleBufferDelegate:self queue:cameraQueue];
    NSDictionary *videoSettings = [[NSDictionary alloc] initWithObjectsAndKeys:[NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA],kCVPixelBufferPixelFormatTypeKey, nil];
    output.videoSettings = videoSettings;
    [captureSession addOutput:output];
    previewLayer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:captureSession];
    previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    previewLayer.frame = self.view.bounds;
    [self.view.layer addSublayer:previewLayer];
    [captureSession startRunning];
    
}

-(void)initUI {
    screenShot = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 110, 177.5)];
    ok = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2 +23, self.view.bounds.size.height-73, 20, 20)];
    person = [[UIImageView alloc]initWithFrame:CGRectMake(-70, self.view.bounds.size.height/2-180, 460, 540)];
    person.image = [UIImage imageNamed:@"redperson"];
    ok.image = [UIImage imageNamed:@"ok"];
    ok.hidden = YES;
    circle = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2 - 40, self.view.bounds.size.height-73, 80, 80)];
    circle.image = [UIImage imageNamed:@"redcircle"];
    photo = [[UIButton alloc]initWithFrame:CGRectMake(self.view.bounds.size.width/2 - 25, self.view.bounds.size.height-55, 50, 45)];
    [photo setBackgroundImage:[UIImage imageNamed:@"redphoto"] forState:UIControlStateNormal];
    [photo addTarget:self action:@selector(takePicture) forControlEvents:UIControlEventTouchUpInside];
    photo.enabled = NO;
    [self.view addSubview:photo];
    [self.view addSubview:ok];
    [self.view bringSubviewToFront:ok];
    [self.view bringSubviewToFront:photo];
    [self.view addSubview:screenShot];
    [self.view addSubview:person];
    [self.view bringSubviewToFront:person];
    [self.view bringSubviewToFront:screenShot];
    [self.view addSubview:circle];
    [self.view bringSubviewToFront:circle];
}


-(void)takePicture{
    
    getSample = YES;
}

-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{

    if (isStart) {
        
        resultImage = [[UIImage alloc] init];


        UIImage *image = [self sampleBufferToImage:sampleBuffer];
        resultImage = [self fixOrientation:image];
        
        FaceppLocalResult *result = [detector detectWithImage:resultImage];
        for (size_t i=0; i

ios - 这是OC版实时人脸检测的代码，今天写了一天了，不知道为什么没成功？

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