据我所知,Xamarin 不通过 Xamarin.Forms 类提供此功能。您将需要在每个特定于平台的项目中实现它。
但是,这应该相当容易,因为您可以使用依赖服务 https://developer.xamarin.com/guides/xamarin-forms/dependency-service/来处理这个问题。
这是一个快速实施...
App.cs
public App()
{
var layout = new StackLayout
{
VerticalOptions = LayoutOptions.Center,
Children =
{
new Label
{
XAlign = TextAlignment.Center,
Text = "Welcome to Xamarin Forms!"
}
}
};
var button = new Button
{
Text = "Click Me"
};
button.Clicked += (object sender, EventArgs e) =>
{
if (_isHidden)
{
// show
DependencyService.Get<IStatusBar>().ShowStatusBar();
}
else
{
// hide
DependencyService.Get<IStatusBar>().HideStatusBar();
}
_isHidden = !_isHidden;
};
layout.Children.Add(button);
// The root page of your application
MainPage = new ContentPage
{
Content = layout
};
}
IStatusBar.cs
public interface IStatusBar
{
void HideStatusBar();
void ShowStatusBar();
}
Android实现
[assembly: Xamarin.Forms.Dependency(typeof(StatusBarImplementation))]
namespace MyXamarinApp.Droid
{
public class StatusBarImplementation : IStatusBar
{
public StatusBarImplementation()
{
}
WindowManagerFlags _originalFlags;
#region IStatusBar implementation
public void HideStatusBar()
{
var activity = (Activity)Forms.Context;
var attrs = activity.Window.Attributes;
_originalFlags = attrs.Flags;
attrs.Flags |= Android.Views.WindowManagerFlags.Fullscreen;
activity.Window.Attributes = attrs;
}
public void ShowStatusBar()
{
var activity = (Activity)Forms.Context;
var attrs = activity.Window.Attributes;
attrs.Flags = _originalFlags;
activity.Window.Attributes = attrs;
}
#endregion
}
}
iOS实现
[assembly: Xamarin.Forms.Dependency(typeof(StatusBarImplementation))]
namespace MyXamarinApp.iOS
{
public class StatusBarImplementation : IStatusBar
{
public StatusBarImplementation()
{
}
#region IStatusBar implementation
public void HideStatusBar()
{
UIApplication.SharedApplication.StatusBarHidden = true;
}
public void ShowStatusBar()
{
UIApplication.SharedApplication.StatusBarHidden = false;
}
#endregion
}
}
这个想法是,当您需要将状态栏隐藏在特定的位置时,您可以调用 DependencyService 实现来隐藏状态栏。ContentPage
。您可能还需要在隐藏后再次显示它(不太确定)。
注意:对于 iOS,您需要更新 Info.plist 文件以允许应用程序更改状态栏可见性。