我开发了 iPad 应用程序。我正在使用导航控制器在弹出窗口中打开一些屏幕。但是我没有在IOS 7中更改navigationcontroller tint color。如何更改此颜色。谢谢
UINavigationController *navigationController = [[[UINavigationController alloc] initWithRootViewController:airportsSearch] autorelease];
navigationController.navigationBar.barTintColor = [UIColor blackColor];
navigationController.navigationBar.translucent = NO;
self.popOver=[[UIPopoverController alloc] initWithContentViewController:navigationController];
self.popOver.delegate = self;
[self.popOver setPopoverContentSize:CGSizeMake(285, 370)];
[self.popOver presentPopoverFromRect:tempButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionLeft animated:YES];