navigationController 自定义backBarButtonItem事件

2019独角兽企业重金招聘Python工程师标准>>>

/**

• 自定义系统默认back事件

• 需要实现 -(UIViewController*)PopViewController;

• return VC; //popToViewController:vc

• return nil; //popViewControllerAnimated **/ -(UIViewController *)popViewControllerAnimated:(BOOL)animated{

  UIViewController *popVC = self.visibleViewController;

  if ([popVC respondsToSelector:@selector(PopViewController)]){ UIViewController *vc = [popVC performSelector:@selector(PopViewController) withObject:nil];

   if (vc && vc != self.viewControllers[self.viewControllers.count -2]) {
       [self popToViewController:vc animated:animated];
  
       NSMutableArray *items = [NSMutableArray array];
  
       for (UIViewController *vc in self.viewControllers) {
           [items addObject:vc.navigationItem];
       }
  
       [self.navigationBar setItems:items animated:YES];
  
       return vc;
   }
  

  } return [super popViewControllerAnimated:animated]; }

-(UIViewController*)PopViewController{ return 指定ViewCOntroller; }

转载于:https://my.oschina.net/u/868062/blog/417464