#import "ViewController.h"

@interfaceViewController ()

@end

@implementationViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    UIImage *aImage = [UIImage imageNamed:@"證件照.jpg"];
    
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, aImage.size.width, aImage.size.height)];
    imageView.center = self
 
.view.center;
    imageView.layer.borderWidth = 1.0;
    imageView.layer.masksToBounds = YES;
    //自適應圖片寬高比例
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    imageView.image = aImage;
    [self.view addSubview:imageView];
    
    CIImage* image = [CIImage imageWithCGImage:aImage.CGImage];
    
    NSDictionary
 
  *opts = [NSDictionary dictionaryWithObject:CIDetectorAccuracyHigh
                                                      forKey:CIDetectorAccuracy];
    
    CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace
                                              context:nil
                                              options:opts];
    
    //得到面部資料
 

    NSArray* features = [detector featuresInImage:image];
    for (CIFaceFeature *f in features)
    {
        
        CGRect aRect = f.bounds;
        aRect.origin.y = imageView.bounds.size.height - aRect.size.height - aRect.origin.y;//self.bounds.size
//給