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问题： 实时人脸检测，相机关闭
描述:
当我调用人脸检测的方法时，当这个方法执行13次后，相机就关闭了，请问为啥
描述:
ios相机人脸检测
当我调用人脸检测的方法时，当这个方法执行13次后，相机就关闭了，请问为啥
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection
{
......
//人脸检测
if(sampleBuffer)
{
[self detectFaceWithBuffer:sampleBuffer andUimage:_image];
_num++;
NSLog(@"%d",self.num);
}
......
}
- (void)detectFaceWithBuffer:(CMSampleBufferRef)sampleBuffer andUimage:(UIImage *)uiimage
{
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CFDictionaryRef attachments = CMCopyDictionaryOfAttachments(kCFAllocatorDefault, sampleBuffer, kCMAttachmentMode_ShouldPropagate);
CIImage *convertedImage = [[CIImage alloc] initWithCVPixelBuffer:imageBuffer options:(__bridge NSDictionary *)attachments];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
self.features = [self.faceDetector featuresInImage:convertedImage options:nil];
for(CIFaceFeature *feature in self.features){
if(feature.hasLeftEyePosition){
CGPoint leftEyePos = feature.leftEyePosition;
NSLog(@"leftX = %f leftY = %f",leftEyePos.x,leftEyePos.y);
}
}
});
}