MFMailComposeViewController外观setTintColor迷失iOS 7

问题描述

这个问题适用于运行iOS 7的Xcode 5，非常奇怪。我试图将所有UInavigation和UIBarButtonItem文本颜色设置为白色。

This question is for Xcode 5 running iOS 7 and is super weird. I am trying to set all the UInavigation and UIBarButtonItem text colors to white.

所以在我的app启动委托中，我将代码设置为。

So in my app launch delegate I set the code as.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    UIImage *NavigationPortraitBackground = [UIImage imageNamed:@"button_header_blue"];

    // Set the background image all UINavigationBars
    [[UINavigationBar appearance] setBackgroundImage:NavigationPortraitBackground forBarMetrics:UIBarMetricsDefault];



    // Set the text appearance for navbar
    [[UINavigationBar appearance] setTitleTextAttributes:
     [NSDictionary dictionaryWithObjectsAndKeys:
      [UIColor whiteColor], UITextAttributeTextColor,
      [UIColor whiteColor], UITextAttributeTextShadowColor,
      [NSValue valueWithUIOffset:UIOffsetMake(0, 0)], UITextAttributeTextShadowOffset,
      [UIFont fontWithName:@"Helvetica Neue" size:21], UITextAttributeFont,
      nil]];


    [[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];


    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                [UIColor whiteColor],
                                UITextAttributeTextColor,
                                [UIColor whiteColor],
                                UITextAttributeTextShadowColor,
                                nil];

    [[UIBarButtonItem appearance] setTitleTextAttributes:attributes forState: UIControlStateNormal];

    [[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];

    // Override point for customization after application launch.
    return YES;
}

如果我两次启动发送邮件操作
- 第一次我看到UIBarButton项目是白色的。我看着它并点击取消按钮
- 第二次我看到它们全部变灰并且除标题外几乎看不见。
- 这是在我的iPhone模拟器和运行iOS 7的iPhone上发生的。

If I launch "send mail" action twice- first time I see UIBarButton items white. I look at it and hit the Cancel button- second time I see them all of them grayed out and barely visible except for the title.- This is happening in both my iPhone simulator and iPhone running iOS 7.

我该如何解决这个问题？

how can I fix this?

推荐答案

我必须这样做为了让它在iOS 7上运行的方式

I had to do it this way in order for it to work on iOS 7

if ([MFMailComposeViewController canSendMail])
    {

        MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
        mailViewController.mailComposeDelegate = self;

        [mailViewController.navigationBar setTintColor:[UIColor whiteColor]];
        [mailViewController.navigationBar setBarTintColor:[UIColor whiteColor]];

....

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