我有一个xamarin表单应用程序,并且已经能够更改导航栏颜色。如何更改状态栏颜色跨平台?在下图中,您可以看到绿色的导航页面栏背景色。上面是蓝色,我想更改它的颜色。如何以xamarin形式实现此跨平台?
您可以使用DependencyService。
public interface IStatusBarColor
{
void SetColoredStatusBar(string color);
}
首先,从nuegt安装插件CurrentActivity,检查https://github.com/jamesmontemagno/CurrentActivityPlugin
using Android.OS;
using Android.Views;
using App24.Droid;
using App24;
using Xamarin.Forms;
using Plugin.CurrentActivity;
[assembly: Dependency(typeof(SetStatusBarColorImplemention))]
namespace App24.Droid
{
public class SetStatusBarColorImplemention : IStatusBarColor
{
public SetStatusBarColorImplemention()
{
}
public void SetColoredStatusBar(string color)
{
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
Device.BeginInvokeOnMainThread(() =>
{
var currentWindow = GetCurrentWindow();
currentWindow.DecorView.SystemUiVisibility = 0;
currentWindow.SetStatusBarColor(Android.Graphics.Color.ParseColor(color));
});
}
}
Window GetCurrentWindow()
{
var window = CrossCurrentActivity.Current.Activity.Window;
window.ClearFlags(WindowManagerFlags.TranslucentStatus);
window.AddFlags(WindowManagerFlags.DrawsSystemBarBackgrounds);
return window;
}
}
}
using App24;
using App24.iOS;
using Foundation;
using UIKit;
using Xamarin.Forms;
using Xamarin.Forms.Platform.iOS;
using ObjCRuntime;
using CoreGraphics;
[assembly: Dependency(typeof(SetStatusBarColorImplemention))]
namespace App24.iOS
{
public class SetStatusBarColorImplemention : IStatusBarColor
{
public void SetColoredStatusBar(string hexColor)
{
if(UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
{
UIWindow window = UIApplication.SharedApplication.KeyWindow;
UIView view = new UIView(window.WindowScene.StatusBarManager.StatusBarFrame);
window.AddSubview(view);
Device.BeginInvokeOnMainThread(() =>
{
if (view.RespondsToSelector(new Selector("setBackgroundColor:")))
{
view.BackgroundColor = Color.FromHex(hexColor).ToUIColor();
}
UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.LightContent, false);
topViewControllerWithRootViewController(UIApplication.SharedApplication.KeyWindow.RootViewController).SetNeedsStatusBarAppearanceUpdate();
});
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
if (statusBar.RespondsToSelector(new Selector("setBackgroundColor:")))
{
statusBar.BackgroundColor = Color.FromHex(hexColor).ToUIColor();
}
UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.LightContent, false);
topViewControllerWithRootViewController(UIApplication.SharedApplication.KeyWindow.RootViewController).SetNeedsStatusBarAppearanceUpdate();
});
}
}
UIViewController topViewControllerWithRootViewController(UIViewController rootViewController)
{
if (rootViewController is UITabBarController)
{
UITabBarController tabBarController = (UITabBarController)rootViewController;
return topViewControllerWithRootViewController(tabBarController.SelectedViewController);
}
else if (rootViewController is UINavigationController)
{
UINavigationController navigationController = (UINavigationController)rootViewController;
return topViewControllerWithRootViewController(navigationController.VisibleViewController);
}
else if (rootViewController.PresentedViewController != null)
{
UIViewController presentedViewController = rootViewController.PresentedViewController;
return topViewControllerWithRootViewController(presentedViewController);
}
else
{
return rootViewController;
}
}
}
}
现在根据需要调用该行。
DependencyService.Get<IStatusBarColor>().SetColoredStatusBar("#00ff00"); // set the color of bar as green
据我所知,您需要分别在每个平台上设置状态栏颜色。在StackOverflow和Google上有很多类似的问题可以帮助您解决问题。
对于Android:在参考资料->值中检查您的styles.xml寻找类似<item name="android:statusBarColor">#000000</item>
的颜色
对于iOS:在AppDelegate.cs中查找FinishedLaunsching
-方法。您可以通过UIApplication.SharedApplication.SetStatusBarStyle(UIStatusBarStyle.DarkContent, false);