handling captureStillImageAsynchronouslyFromConnection:completionHandler: - ios

Question

Ive been trying to set up a small iOS method that takes a picture automatically when user opens the app. After much research i finally found this iOS taking photo programmatically and after a little more i found this from apple https://developer.apple.com/library/ios/samplecode/AVCam/Introduction/Intro.html can someone help me get started in setting up a method for captureStillImageAsynchronouslyFromConnection:completionHandler:
i don't want any interaction from said user. thanks

Answer 1

Even though you seem to want to do the call asynchronously and using AVFoundation, I still recommend simply using a UIImagePickerController in this case, ex:
- (void)viewDidLoad {
[super viewDidLoad];
// If the device has a camera...
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
// Create an image picker
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
imagePickerController.showsCameraControls = NO;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:^{
// And take the picture after a short delay
// to give the view and image picker time to get
// ready
[self performSelector:#selector(takepic:) withObject:imagePickerController afterDelay:2];
}];
}
}
// Automatically take the picture using the
// image picker passed in as a parameter
- (void)takepic:(UIImagePickerController*)imagePickerController {
[imagePickerController takePicture];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
// ... Do whatever with the image ...
[picker dismissViewControllerAnimated:YES completion:nil];
}