反HOOK基本防护
- 利用fishhook修改MethodSwizzle相关的函数
- 防护代码要最先被加载，否则HOOK修改完毕了，防护无效
- 原始工程所编写的Framwork库会优先于注入库加载。所以适合写防护代码。
#import "ViewController.h"
#import <objc/runtime.h>
#import "fishhook.h"
@interface ViewController ()
@end
@implementation ViewController
+(void)load {
//防护代码
struct rebinding bd;
bd.name = "method_exchangeImplementations";
bd.replacement = myExchange;
bd.replaced = (void *)&exchangeP;
struct rebinding rebs[1] = {bd};
rebind_symbols(rebs, 1);
//进攻的代码！
// getIMP setIMP
Method old = class_getInstanceMethod(self, @selector(btnClick1:));
Method newMethod = class_getInstanceMethod(self, @selector(click1Hook:));
method_exchangeImplementations(old, newMethod);
}
//函数指针变量
void (*exchangeP)(Method _Nonnull m1, Method _Nonnull m2);
void myExchange(Method _Nonnull m1, Method _Nonnull m2) {
NSLog(@"检测到HOOK！！！");
}
- (void)click1Hook:(id)sender{
NSLog(@"HOOK成功！！");
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (IBAction)btnClick1:(id)sender {
NSLog(@"按钮1调用了！");
}
- (IBAction)btnClick2:(id)sender {
NSLog(@"按钮2调用了！");
}
@end
- 如果自己也想使用
method_exchangeImplementations方法 ，那就把method_exchangeImplementations定义为宏
