MFMailComposeViewController栏背景颜色在iOS7中没有变化

Question

我试图改变背景颜色的MFMailComposeViewController在iOS7但我不能使它发挥作用.

我正在使用以下剪辑:

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

if([picker.navigationBar respondsToSelector:@selector(barTintColor)]) {
    // iOS7
    picker.navigationBar.barTintColor = READER_NAVIGATION_BAR_BACKGROUND_COLOR;
    // Set back button arrow color
    [picker.navigationBar setTintColor:READER_NAVIGATION_BAR_BACK_BUTTON_ARROW_COLOR];

    // Set Navigation Bar Title Color
    [picker.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObject:READER_NAVIGATION_BAR_TITLE_NORMAL_FONT_COLOR forKey:UITextAttributeTextColor]];

    // Set back button color
    [[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:READER_NAVIGATION_BAR_BUTTONS_FONT_COLOR, UITextAttributeTextColor,nil] forState:UIControlStateNormal];

} 

有谁知道如何改变iOS7中的bakcground颜色MFMailComposeViewController？

Answer 1

这里的诀窍是称为"外观方法",如

[UINavigationBar appearance].barTintColor = [UIColor whiteColor];
[UINavigationBar appearance].tintColor = [UIColor redColor];

在打电话之前

[[MFMailComposeViewController alloc] init];

这样,配色方案将应用于邮件编辑器.它可能会返回到默认值mailComposeController:didFinishWithResult:

Answer 2

试试这个.为我工作.

MFMailComposeViewController* myailViewController = [[MFMailComposeViewController alloc] init];
// set other attributes of mailcomposer here.
myMailViewController.mailComposeDelegate = self;

[myMailViewController.navigationBar setTintColor:[UIColor whiteColor]];

[self presentViewController:myMmailViewController animated:YES completion:nil];

Answer 3

Swift 3解决方案:

extension MFMailComposeViewController {
    override open func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        UIApplication.shared.statusBarStyle = UIStatusBarStyle.lightContent
    }

    open override func viewDidLoad() {
        super.viewDidLoad()
        navigationBar.isTranslucent = false
        navigationBar.isOpaque = false
        navigationBar.barTintColor = UIColor.white
        navigationBar.tintColor = UIColor.white
    }
}