BadAssSwizzle.m

#import <objc/runtime.h>
#import <Foundation/Foundation.h>

@implementation NSObject (BadAssSwizzle)

+ (void)load {
    SEL originalSelector = @selector(init);
    SEL overrideSelector = @selector(myInit);
    Method originalMethod = class_getInstanceMethod(self, originalSelector);
    Method overrideMethod = class_getInstanceMethod(self, overrideSelector);
    if (class_addMethod(self, originalSelector, method_getImplementation(overrideMethod), method_getTypeEncoding(overrideMethod))) {
        class_replaceMethod(self, overrideSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
    } else {
        method_exchangeImplementations(originalMethod, overrideMethod);
    }
}

- (void)myInit {
    NSLog(@"%@", [self class]);
    [self myInit];
}

@end