ios - UIActivityViewController 在导航栏上显示电子邮件模态视图 Controller

Question

我有一个带有导航栏的应用程序和一个在按下按钮时显示 UIActivityViewController 的 View Controller 。Problem is that when mail is chosen the mail modal view controller covers the navigation bar (image attached - notice the cancel button on the top left).有什么想法吗？

这是显示事件 View Controller 的代码-

UIActivityViewController *activityViewController = [[UIActivityViewController alloc]
                                                        initWithActivityItems:@[message, self.currentImage] applicationActivities:nil];
    [self presentViewController:activityViewController animated:YES completion:^{
        dispatch_async(dispatch_get_main_queue(), ^{
            NSString *flurryEvent = [NSString stringWithFormat:@"Shared chapter %@", self.chapterIndex];
            [Flurry logEvent:flurryEvent];
        });
    }];

顺便说一句，消息也有同样的问题，但我想如果我解决了一个问题，另一个问题也会得到解决。

Answer 1

已修复!

UIActivityViewController *activityViewController = [[UIActivityViewController alloc]
                                                    initWithActivityItems:@[message, self.currentImage] applicationActivities:nil];
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:nil] forBarMetrics:UIBarMetricsDefault];
activityViewController.completionHandler = ^(NSString *activityType, BOOL completed) {
    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"logo.png"] forBarMetrics:UIBarMetricsDefault];
};
[self presentViewController:activityViewController animated:YES completion:^{
    dispatch_async(dispatch_get_main_queue(), ^{

    });
}];