Question

我尝试使用UINavigationBar设置Xamarin MonoTouch的样式。在UIViewController的构造函数中，我尝试了以下内容：

//this.NavigationController.NavigationBar.TintColor = UIColor.Magenta;
UINavigationBar.Appearance.TintColor = UIColor.Yellow;

但是，如果我尝试在模拟器中运行它，则没有任何改变。我应该在哪里放置此代码？如何使用RGB颜色（UIColor.FromRGB (0, 127, 14)？）我的代码是否正确？

Answer 1

我的解决方案：

//AppDelegate.cs
public partial class AppDelegate : UIApplicationDelegate
{
    // class-level declarations
    UIWindow window;
    public static UIStoryboard Storyboard = UIStoryboard.FromName ("MainStoryboard", null);
    public static UIViewController initialViewController;

    // ...
    public override bool FinishedLaunching (UIApplication app, NSDictionary options)
    {
        window = new UIWindow (UIScreen.MainScreen.Bounds);
        initialViewController = Storyboard.InstantiateInitialViewController () as UIViewController;

        UINavigationBar.Appearance.SetTitleTextAttributes (
            new UITextAttributes () { TextColor = UIColor.FromRGB (0, 127, 14) });

        window.RootViewController = initialViewController;
        window.MakeKeyAndVisible ();
        return true;
    }
}

Answer 2

假设你正在为iOS7开发，你需要设置BarTintColor。

UINavigationBar.Appearance.BarTintColor = UIColor.Red;
UINavigationBar.Appearance.BarTintColor = UIColor.FromRGB(0, 127, 14);

请参阅：How to change UINavigationBar background color from the AppDelegate

将此代码放在AppDelegate.cs

中

Answer 3

试试这个..

NSDictionary *textTitleOptions = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor darkGrayColor], UITextAttributeTextColor, [UIColor whiteColor], UITextAttributeTextShadowColor, nil];
[[UINavigationBar appearance] setTitleTextAttributes:textTitleOptions];

或者你可以参考更多 IOS 7 Navigation Bar text and arrow color

Answer 4

你应该具体使用UIViewController，如：

viewController.navigationBar.tintColor = [UIColor yellowColor];

或在UIViewController中

self.navigationBar.tintColor = [UIColor yellowColor];

更改导航栏标题的颜色

4 个答案: