单击搜索栏上的取消按钮时，如何弹出自视图控制器？

Question

I have created the search view controller to add the articles searched to the main view controller. I wanna make it to pop itself from navigation view controller by clicking the cancel button of search bar. I have tried like as below:

- (void) searchBarCancelButtonClicked:(UISearchBar*) searchBar {
  [self.navigationController popViewControllerAnimated:NO];
}

I need a help from everybody.

Answer 1

检查是否已将searchBar委托分配给viewController ..，还检查navigationController是否为nil，则代码应该工作。