问题描述
当我尝试以横向模式 ( https://web-labosims.org/animations/App_refraction_reflexion/App_refraction&reflexion.html ) 在 webView
中显示我的一个网页时,它可以在 Android 上正常工作。
但是当它不是第一页并且我在页面之间更改方向时,它在 Android 上不再正常工作(显示问题)...
MainPage.xaml.cs
public partial class MainPage : ContentPage
{
private List<Anim> lesAnimations;
public MainPage()
{
InitializeComponent();
String animsJson = "[{\"Nom\":\"Réfraction et réfexion\",\"url\":\"https://web-labosims.org/animations/App_refraction_reflexion/App_refraction&reflexion.html\",\"imageUrl\":\"App_refraction.png\"},{\"Nom\":\"Synthèse soustractive\",\"url\":\"https://web-labosims.org/animations/App_lumiere3/App_lumiere3.html\",\"imageUrl\":\"App_soustractive.png\"}]";
lesAnimations = JsonConvert.DeserializeObject<List<Anim>>(animsJson);
maListView.ItemsSource = lesAnimations;
maListView.ItemSelected += (sender,e) =>
{
if (maListView.SelectedItem != null)
{
Anim item = maListView.SelectedItem as Anim;
GoAnimation(item.url);
}
maListView.SelectedItem = null;
};
}
private async Task GoAnimation(String url)
{
await this.Navigation.PushAsync(new Animation(url));
}
protected override void OnAppearing()
{
base.OnAppearing();
DependencyService.Get<IOrientationHandler>().ForcePortrait();
}
protected override void Ondisappearing()
{
base.Ondisappearing();
DependencyService.Get<IOrientationHandler>().ForceLandscape();
}
}
动画.xaml
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:controls="clr-namespace:LaboSims;assembly=LaboSims"
x:Class="LaboSims.Animation">
<ContentPage.Content>
<WebView x:Name="maWebView"
WidthRequest="1000"
HeightRequest="1000"
/>
</ContentPage.Content>
</ContentPage>
Animation.xaml.cs
public partial class Animation : ContentPage
{
public Animation(String url)
{
InitializeComponent();
NavigationPage.SetHasNavigationBar(this,false);
maWebView.source = url;
}
}
IOrientationHandler.cs
namespace LaboSims
{
public interface IOrientationHandler
{
void ForceLandscape();
void ForcePortrait();
}
}
在安卓上
using Android.Content.PM;
using LaboSims.Droid;
using Plugin.CurrentActivity;
[assembly: Xamarin.Forms.Dependency(typeof(OrientationHandler))]
namespace LaboSims.Droid
{
public class OrientationHandler : IOrientationHandler
{
public void ForceLandscape()
{
CrossCurrentActivity.Current.Activity.RequestedOrientation = Screenorientation.Landscape;
}
public void ForcePortrait()
{
CrossCurrentActivity.Current.Activity.RequestedOrientation = Screenorientation.Portrait;
}
}
}
我不明白我哪里出错了...
解决方法
我确信问题应该很简单,而且确实是一个简单的错误……我在网页上的元标记中犯了一个小错误。 我把它改成:
<meta name="viewport" content="user-scalable=no,width=device-width,initial-scale=1,maximum-scale=1">
而且一切正常