UIPopoverPresentationController对象不会在委托方法中取消分配

Question

我有一个text field(cInputField)的子类，这个子类包含一个委托，它回调在父视图中打开一个popover。

• 父视图中的cInputField对象

  self.agencyField.inputType = PopupPicker;
  self.agencyField.indicator = Filter;
  self.agencyField.cInputFieldDeleagate = self;
  self.agencyField.text = @"";
  self.agencyField.placeholder = RWLocalizedString(@"Select Agency", @"Select Agency");
  

• 调用委托方法

  [self.cInputFieldDeleagate performSelector:@selector(popupPickerTouchUpEvent:) withObject:self];
  

• CInputField委托方法

  - (void)popupPickerTouchUpEvent:(CInputField *)cInputField {
      [self openAgencyPicker:cInputField];
  }
  

• 打开弹出功能

  - (void)openAgencyPicker:(id)sender{
  
      if (!agencyPicker) {
      agencyPicker = [[CPickerController alloc]
                      initWithSize:CGSizeMake(300, 500)];
  
      agencyPicker.displayTitle = RWLocalizedString(@"SFA.Product.Agency", @"Agency");
      agencyPicker.items = [SalesDataManager getRclAgencyListByShipTo:[[OrderState sharedInstance] orderHeader].storeCd];
      agencyPicker.valueMember = @"value";
      agencyPicker.displayMember = @"text";
      agencyPicker.delegate = self;
      agencyPicker.selectedIndex = -1;
  
      agencyContentNav = [[UINavigationController alloc] initWithRootViewController:agencyPicker];
      agencyContentNav.modalPresentationStyle = UIModalPresentationPopover;
     }
  
      [[AppD menuViewController] presentViewController:agencyContentNav animated:YES completion:nil];
  
      popOverPresentController = agencyContentNav.popoverPresentationController;
      popOverPresentController.sourceView = [sender superview];
      popOverPresentController.sourceRect = popOverRect;
      popOverPresentController.permittedArrowDirections = UIPopoverArrowDirectionAny;
  }
  

问题

在下面添加代码后，我的表单在Xcode工具中没有取消分配（分配模式）

[[AppD menuViewController] presentViewController:agencyContentNav animated:YES completion:nil];

popOverPresentController = agencyContentNav.popoverPresentationController;
popOverPresentController.sourceView = [sender superview];
popOverPresentController.sourceRect = popOverRect;
popOverPresentController.permittedArrowDirections = UIPopoverArrowDirectionAny;

知道这里有什么问题吗？非常感谢，如果有人可以提供帮助。