Camera doesn't reality after taking any photo using UIImagePickerControllerSourceTypeCamera

[nghiadhd]

My application has 2 modes are AR and list.
I allocate ARView and add it as subview in first controller, it works well
But when I switch to second controller and take a photo using UIImagePickerControllerSourceTypeCamera. Now the AR mode doesn't reality, it just show the static picture.

How I can refresh the "reality" of ARView?

Thanks in advance