ios - 更改UIDocumentInteractionController上的NavigationBar背景

Question

我必须将UIWebView的本地PDF文件(文档目录)传递给其他应用程序(iBooks，Facebook Messenger，WhatsApp等)。

所以我用UIDocumentInteractionController:

- (IBAction)shareButton:(id)sender
{
    NSURL *url = [NSURL URLWithString:self.webView.request.URL.absoluteString];

    self.docController = [UIDocumentInteractionController interactionControllerWithURL:url];
    self.docController.delegate = self;
    [self.docController presentOpenInMenuFromBarButtonItem:sender animated:YES];
}

如果我选择FB Messenger或WhatsApp，它将显示一个ViewController。

如何更改此VC的NavigationBar外观(背景图像/颜色，按钮色调)？默认白色半透明会很好。

我在AppDelegate中设置了NavigationBar背景图像。

Answer 1

试试这个代码:

- (void)openEC:(NSURL*)url {  
[UINavigationBar appearance].tintColor = [UIColor blueColor];  
docController = [UIDocumentInteractionController interactionControllerWithURL:url];  
[docController setDelegate:self];  
[docController  presentOptionsMenuFromRect:self.view.bounds inView:self.view animated:YES];  

}

- (void)documentInteractionControllerDidDismissOptionsMenu:(UIDocumentInteractionController *)controller {  
[UINavigationBar appearance].tintColor = [UIColor whiteColor];  

}