Easy fix solution:
Just add a new runtime attribute which will set the tintColor of the UIImageView to the specified color and ensure the image is tinted.
You will still need to set your image to be rendered as a template image in your Images.xcassets file.
This way you dont need any additional outlets, extensions or lines of code.
Also take note:
It will not apply the tintColor in the user defined attribute if the tintColor on the view is the same color, they must be different.