Why can the keyword “weak” only be applied to class and class-bound protocol types

Question

When I\'m declaring variables as weak in Swift, I sometimes get the error message from Xcode:

\'weak\' may only be applied to class and

Answer 1

I was using objective C class in swift for a scrolView. I created IBOutlet of that scroll view. And while compiling code this error started showing.

So to fix this kind of issue, import that class in your bridging header

import "YourClass.h"

I was using Xcode 9.2 with swift 3.2