//
//  DDYHookUtility.m
//  DDTG
//
//  Created by 翟玉磊 on 16/5/6.
//  Copyright © 2016年 翟玉磊. All rights reserved.
//

#import "DDYHookUtility.h"

@implementation DDYHookUtility


+ (void)SwizzlingInClass:(Class)cls originalSelector:(SEL)originalSelector swizzledSelector:(SEL)swizzledSelector {
    
    Class class = cls;
    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);
    }
}
@end