如何使用 Xamarin 的 FFImageLoading 加载本地存储在字节数组中的图像? [英] How do load a image stored locally in byte array using FFImageLoading for Xamarin?

问题描述

我需要能够使用 FFImageLoading.ImageService 将我之前从图像解码的字节数组加载到 FFImageLoading.Views.ImageViewAsync 对象中.方法 ImageService.Instance.LoadImage(IImageLoaderTask task) 似乎是方法，但我不知道如何设置该接口的对象，我找不到使用此类型对象的任何引用在源网站上.

I need to be able use FFImageLoading.ImageService to load a byte array I decoded from an image earlier, into a FFImageLoading.Views.ImageViewAsync object. The method ImageService.Instance.LoadImage(IImageLoaderTask task) seems to be the way but I have no idea how to set up an object of that interface and I can't find any references to using this type object on the source website.

如何将 byte[] 加载到 ImageViewAsync 对象中?

How to load a byte[] into a ImageViewAsync object?

推荐答案

既然你已经有了一个 byte[]，你可以用 LoadStream 方法来实现.

Since you already have a byte[] you could you this with the LoadStream method.

类似于:

ImageService.Instance
            .LoadStream (GetStreamFromImageByte)
            .Into (imageView);

这就是做实际工作的方法.

And this is the method to do the actual work.

Task<Stream> GetStreamFromImageByte (CancellationToken ct)
{
    //Here you set your bytes[] (image)
    byte [] imageInBytes = null;

    //Since we need to return a Task<Stream> we will use a TaskCompletionSource>
    TaskCompletionSource<Stream> tcs = new TaskCompletionSource<Stream> ();

    tcs.TrySetResult (new MemoryStream (imageInBytes));

    return tcs.Task;
}

这应该有效.

这篇关于如何使用 Xamarin 的 FFImageLoading 加载本地存储在字节数组中的图像?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！