SearchController Searchbar背景颜色属性在ios Objective-C中也更改了导航条颜色

Question

请检查我是否尝试过，但这会更改整个颜色，但不会更改搜索栏背景。

1. try with navigation searchcontroller searchbar
2. my uisearchcontroller searchbar 
1.
     if (@available(iOS 11.0, *)) {
          self.navigationItem.searchController=nil;
          self.navigationItem.searchController.searchBar.backgroundColor=nil;
          self.navigationItem.searchController.searchBar.barTintColor=nil;
          self.navigationItem.searchController = self.searchControllerInvoice;
          [self.searchControllerInvoice.searchBar setBackgroundColor:UIColor.redColor];
          [self.searchControllerInvoice.searchBar setBarTintColor:UIColor.yellowColor];
          [self.searchControllerInvoice.searchBar setTintColor:UIColor.greenColor];
     } else {
          self.getInvoiceTable.tableHeaderView = self.searchControllerInvoice.searchBar;
     }
     OR
2.
     if (@available(iOS 11.0, *)) {
          self.navigationItem.searchController=nil;
          self.navigationItem.searchController.searchBar.backgroundColor=nil;
          self.navigationItem.searchController.searchBar.barTintColor=nil;
          self.navigationItem.searchController = self.searchControllerInvoice;
          [self.navigationItem.searchController.searchBar setBackgroundColor:UIColor.redColor];
          [self.navigationItem.searchController.searchBar setBarTintColor:UIColor.yellowColor];
          [self.navigationItem.searchController.searchBar setTintColor:UIColor.greenColor];
     } else {
          self.getInvoiceTable.tableHeaderView = self.searchControllerInvoice.searchBar;
     }

我尝试过背景，巴结，色调，但问题仍然存在