iOS开发如何判断当前控制器进出栈状态

Posted 2022-11-28 wangjunling888

-(void)viewWillDisappear:(BOOL)animated 
    NSInteger index = [self.navigationController.viewControllers indexOfObject:self];
    if(index == NSNotFound) 
        //即将出栈，销毁

     else 
        //只是保存状态，暂停 
        [super viewWillDisappear:animated];