Question

How to supress a warning on the line on Objective-C compiler?

...
[[UIWebDocumentView class] jr_swizzleMethod:@selector(canPerformAction:withSender:) withMethod:@selector(myCanPerformAction:withSender:) error:nil]; // warning here
...

NSObject has this method (as category). But compiler thinks that UIWebDocumentView doesn’t. This is a compiller’s issue. Is there any directive to suppress warnings on a block of the code?

The warning:

Receiver ‘UIWebDocumentView’ is a forward class and corresponding
@interface may not exist

P.S. UIWebDocumentView is a private API – so can’t use performSelector method tu supress the warning.

Answer 1

The easiest way to fix this is just to get the class a different way:

[NSClassFromString(@"UIWebDocumentView") jr_swizzleMethod:@selector(canPerformAction:withSender:) withMethod:@selector(myCanPerformAction:withSender:) error:nil]; // warning here