After iOS adds a custom back button, sliding right to return is invalid, and the data refreshes when returning.

Swipe right to return will be invalid after customizing the return button

   //返回按钮
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"return"] style:(UIBarButtonItemStylePlain) target:self action:@selector(back)];

The built-in return button will be overwritten. At this time, the original right slide return will be invalid. You should add a code to make the right slide work normally:

// 解决右滑返回失效问题
    self.navigationController.interactivePopGestureRecognizer.delegate = self;

In this case, the controller needs to have a navigation bar. If the navigation bar of the controller is hidden or replaced by a custom view, the navigation bar part will be hidden when returning, so it is recommended to use the system navigation column

In addition: If you perform a refresh operation in viewDidAppear, there will be no right-swiping back to freeze phenomenon.

viewWillAppear:(BOOL)animated; // Triggered when the root view of the view controller is about to be displayed;

viewDidAppear:(BOOL)animated; // Triggered when the root view of the view controller is displayed;