UIPopoverController 中 UINavigationBar 的色调不起作用

Question

代码：

UIViewController *viewController = [[UIViewController alloc] initWithNibName:@"NibName" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
navigationController.navigationBar.tintColor = [UIColor redColor];
self.popoverController = [[[UIPopoverController alloc]     
initWithContentViewController:navigationController] autorelease];
popoverController.popoverContentSize = viewController.view.frame.size;
[popoverController presentPopoverFromRect:sender.frame inView:sender.superview
permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
[viewController release];
[navigationController release];

UINavigationBar的tint color属性不起作用，它仍然具有默认颜色。 我可能做错了什么？

Answer 1

self.popoverController.popoverBackgroundViewClass = [MyCustomBackgroundView class];

@interface MyCustomBackgroundView : UIPopoverBackgroundView {
@private
}
@end

@implementation MyCustomBackgroundView

@synthesize arrowOffset;
@synthesize arrowDirection;

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor redColor];
    }
    return self;
}

+ (UIEdgeInsets)contentViewInsets {
    return UIEdgeInsetsMake(0, 0, 1, 0);
}

+ (CGFloat)arrowHeight{
    return 0.0;
}

+ (CGFloat)arrowBase{
    return 0.0;
}

@end

Answer 2

从 iOS 5 开始，popoverBackgroundViewClass 可用，这是实现此目的的方法。