添加图片:

UIImage* image = [UIImage imageNamed:@"face.jpg"];

UIImageView *testImage = [[UIImageView alloc] initWithImage: image];

[testImage setTransform:CGAffineTransformMakeScale(1, -1)];

[[[UIApplication sharedApplication] delegate].window setTransform:

CGAffineTransformMakeScale(1, -1)];

[testImage setFrame:CGRectMake(, , testImage.image.size.width,

testImage.image.size.height)];

[self.view addSubview:testImage];

识别图片:

CIImage* ciimage = [CIImage imageWithCGImage:image.CGImage];

NSDictionary* opts = [NSDictionary dictionaryWithObject:

CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];

CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace

context:nil options:opts];

NSArray* features = [detector featuresInImage:ciimage];

标出脸部,眼睛和嘴:

for (CIFaceFeature *faceFeature in features){

}

// 标出脸部

CGFloat faceWidth = faceFeature.bounds.size.width;

UIView* faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];

faceView.layer.borderWidth = 1;

faceView.layer.borderColor = [[UIColor redColor] CGColor];

[self.view addSubview:faceView];

// 标出左眼

if(faceFeature.hasLeftEyePosition) {

UIView* leftEyeView = [[UIView alloc] initWithFrame:

CGRectMake(faceFeature.leftEyePosition.x-faceWidth*0.15,

faceFeature.leftEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];

[leftEyeView setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];

[leftEyeView setCenter:faceFeature.leftEyePosition];

leftEyeView.layer.cornerRadius = faceWidth*0.15;

[self.view  addSubview:leftEyeView];

}

// 标出右眼

if(faceFeature.hasRightEyePosition) {

UIView* leftEye = [[UIView alloc] initWithFrame:

CGRectMake(faceFeature.rightEyePosition.x-faceWidth*0.15,

faceFeature.rightEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];

[leftEye setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];

[leftEye setCenter:faceFeature.rightEyePosition];

leftEye.layer.cornerRadius = faceWidth*0.15;

[self.view  addSubview:leftEye];

}

// 标出嘴部

if(faceFeature.hasMouthPosition) {

UIView* mouth = [[UIView alloc] initWithFrame:

CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2,

faceFeature.mouthPosition.y-faceWidth*0.2, faceWidth*0.4, faceWidth*0.4)];

[mouth setBackgroundColor:[[UIColor greenColor] colorWithAlphaComponent:0.3]];

[mouth setCenter:faceFeature.mouthPosition];

mouth.layer.cornerRadius = faceWidth*0.2;

[self.view  addSubview:mouth];

}