How to know if iPhone camera is ready to take picture?

Question

When [camera takePicture] is called before the camera is ready, it spits out this message:

UIImagePickerController: ignoring request to take pictu

Answer 1

This makes sure to start capturing video as soon as camera is ready

imgpicker = [[UIImagePickerController alloc] init];  
[self presentViewController:imgpicker animated:YES completion:^(void){       
while(![imgpicker startVideoCapture]);
}];