MFMailComposeViewController 视图闪烁问题

Question

当我显示 MFMailComposeViewController 时，它查看闪烁（首先进入导航栏，然后下降到正确位置）首先看起来像“到”字段进入导航栏然后出来。我正在使用以下代码。`
self.resignFirstResponder() self.mailPicker = MFMailComposeViewController()

    self.mailPicker!.setToRecipients(self.mailer)
    self.mailPicker!.setSubject("hello");
    self.mailPicker!.setMessageBody("message text", isHTML: false);
    self.mailPicker!.mailComposeDelegate = self;
    self.mailPicker!.delegate = self

    self.presentViewController(self.mailPicker!, animated: true, completion: nil)`

Answer 1

尝试将此添加到您的视图控制器：

- (void)viewDidAppear:(BOOL)animated {
    [UINavigationBar appearance].translucent = NO;
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated {
    [UINavigationBar appearance].translucent = YES;
    [super viewWillDisappear:animated];
}