GPUImageToonFilter Issue

[Alexandr720]

Hello,
Now I am making a simple image filtering app in swift and I want to filter it to a cartoon image.
I have already import GPUImage and Filter Button.
After uploading the image, I am trying to filter it to a cartoon image.
But it was not working.
Kindly know me how to code and fix them.
I look forward to messaging from you.
Thanks