Question

我的应用中有loading.gif个文件。如果我使用jpg图片，它显示在应用程序中。如果我使用gif图片，则不显示动画。 [它就像jpg pic]

标记：

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">  
<phone:WebBrowser x:Name="browser" IsScriptEnabled="True" Margin="-12,0,-11,0" LoadCompleted="htmlLoadCompleted"/>         
<Image x:Name="CoverImage" HorizontalAlignment="Center" Source="Assets/loading.gif" VerticalAlignment="Center"/>  
</Grid>

代码：

private void htmlLoadCompleted(object sender, NavigationEventArgs e)
    {
        this.CoverImage.Visibility = Visibility.Collapsed;
    }

Answer 1

从nuget包管理器安装imagetools .. 并将此命名空间添加到您的xaml ..

xmlns:imagetools="clr-namespace:ImageTools.Controls;assembly=ImageTools.Controls"

然后将其添加到您的页面资源..

<phone:PhoneApplicationPage.Resources>
    <imagetools:ImageConverter x:Key="ImageConverter" />
</phone:PhoneApplicationPage.Resources>

然后像这样在xaml中定义图像..

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
        <imagetools:AnimatedImage x:Name="CoverImage" HorizontalAlignment="Center" Source="{Binding ImageSource, Converter={StaticResource ImageConverter}}" VerticalAlignment="Center"/>
    </Grid>

现在在您的代码中执行此操作..

private Uri _ImageSource;
    public Uri ImageSource
    {
        get
        {
            return _ImageSource;
        }
        set
        {
            _ImageSource = value;
            OnPropertyChanged("ImageSource");
        }
    }

    // Constructor
    public MainPage()
    {
        InitializeComponent();
        ImageTools.IO.Decoders.AddDecoder<GifDecoder>();
        ImageSource = new Uri("/Assets/loading.gif", UriKind.Relative);
        this.DataContext = this;
        // Sample code to localize the ApplicationBar
        //BuildLocalizedApplicationBar();
    }

如果你像你这样在你的page.cs中添加InotifyPropertyChanged会更好.. 将此添加到您的代码..

 public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(String str)
    {
        if (PropertyChanged != null)
        {
            PropertyChangedEventArgs e = new PropertyChangedEventArgs(str);
            PropertyChanged(this, e);
        }
    }

并从InotifyPropertychanged中继承您的类..这就是..

 MainPage : PhoneApplicationPage,INotifyPropertyChanged

希望这可以帮助你..

wp8：gif图片在应用程序中没有动画效果？

1 个答案: