#import <Foundation/Foundation.h>

@interface MisImp : NSObject

- (void)foo;
+ (void)fooMethod;
@end


#import "MisImp.h"
#import <objc/runtime.h>

void dynamicMethodIMP(id self, SEL _cmd) {
    NSLog(@"😄 dynamicMethodIMP");
}

void classDynamicMethodIMP(id self, SEL _cmd) {
    NSLog(@"😄 classDynamicMethodIMP");
}
@implementation MisImp

+ (BOOL)resolveInstanceMethod:(SEL)sel {
    if (sel == @selector(foo)) {
        class_addMethod([self class], sel, (IMP)dynamicMethodIMP, "v@:");
        return YES;
    }
    return [super resolveInstanceMethod:sel];
}

+ (BOOL)resolveClassMethod:(SEL)sel{
    
    Class metaClass = objc_getMetaClass(class_getName(self));
    if (sel == @selector(fooMethod)) {
        class_addMethod(metaClass, sel, (IMP)classDynamicMethodIMP, "v@:");
        return YES;
    }
    return [super resolveClassMethod:sel];
    
}

@end