Swizzling copypasta

TJSwizzle.m

#import <objc/runtime.h>

void tj_swizzle(Class class, SEL originalSelector, SEL swizzledSelector)
{
    Method originalMethod = class_getInstanceMethod(class, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
    
    BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
    
    if (didAddMethod) {
        class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
    } else {
        method_exchangeImplementations(originalMethod, swizzledMethod);
    }
}

void tj_swizzleClassMethod(Class class, SEL originalSelector, SEL swizzledSelector)
{
    Method originalMethod = class_getClassMethod(class, originalSelector);
    Method swizzledMethod = class_getClassMethod(class, swizzledSelector);
    
    BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
    
//    if (didAddMethod) {
//        class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
//    } else {
        method_exchangeImplementations(originalMethod, swizzledMethod);
//    }
}

//@interface Class (Hacks)
//
//@end
//
//@implementation Class (Hacks)
//
//+ (void)load
//{
//	tj_swizzle([self class], ...)
//}
//
//@end