IOS实现hook的功能,拦截UINavigati…

在IOS实现hook的功能,拦截UINavigationController的页面跳转pushViewController方法

viewDidLoad中添加如下代码

//================
  Method sendEvent = class_getInstanceMethod([UINavigationController class], @selector(pushViewController: animated:));
  Method sendEventMySelf = class_getInstanceMethod([self class], @selector(sendEventHooked:animated:));
   
   // 将目标函数的原实现绑定到sendEventOriginalImplemention方法上
  IMP sendEventImp = method_getImplementation(sendEvent);
  class_addMethod([UINavigationController class], @selector(myPushViewController: animated:), sendEventImp, method_getTypeEncoding(sendEvent));
   
   //
  IMP sendEventMySelfImp = method_getImplementation(sendEventMySelf);
  class_replaceMethod([UINavigationController class], @selector(pushViewController: animated:), sendEventMySelfImp, method_getTypeEncoding(sendEvent));

实现HOOK方法，既可以拦截对应的方法，添加业务操作后，再调用原有方法

- (void)sendEventHooked:(UIViewController *)view animated:(BOOL)anim
{
  
   NSLog(@"!!!!!!!===============haha, this is my self sendEventMethod!!!!!!!");
  
   [self performSelector:@selector(myPushViewController:animated:) withObject:view withObject:nil];
}