Xamarin XafImageLoading CachedImage问题

我从这样一个API获得了一个

.PNG

图像文件

public static async Task<CachedImage> GetImage(string UserID)
{
    var URL = "assumeThisUrlPointsToServer"

    HttpClient client = new HttpClient();

    Stream stream = await client.GetStreamAsync(URL);

    return new CachedImage { Source = ImageSource.FromStream(() => stream) };
}

---

然后它（

CachedImage

）就可以工作了

因此xamarin提供了一种查看图像的简单方法，您只需将图像的url作为image/cachedimage的源即可

<ffimageloading:CachedImage HeightRequest="52" Margin="13,0,16,0" Source="{Binding ImageURL}"/>

---

其中ImageURL是我从

下载图像的URL。每次图像加载后，流被释放，您必须将代码修改为：

public static async Task<CachedImage> GetImage(string UserID)
{
    var URL = "assumeThisUrlPointsToServer"

    HttpClient client = new HttpClient();

    return new CachedImage { Source = ImageSource.FromStream(() => {
        return await client.GetStreamAsync(URL);
    })};
}

公共静态异步任务GetImage（字符串UserID）
{
var URL=“assumeThisUrlPointsToServer”
HttpClient=新的HttpClient（）；
返回新的CachedImage{Source=ImageSource.FromStream（（）=>{
返回wait client.GetStreamAsync（URL）；
})};
}

您是否遵循了此处提到的所有步骤是的，如果我没有，它根本不会工作！

<ffimageloading:CachedImage HeightRequest="52" Margin="13,0,16,0" Source="{Binding ImageURL}"/>

public static async Task<CachedImage> GetImage(string UserID)
{
    var URL = "assumeThisUrlPointsToServer"

    HttpClient client = new HttpClient();

    return new CachedImage { Source = ImageSource.FromStream(() => {
        return await client.GetStreamAsync(URL);
    })};
}