AQGridView 和 PDF 缩略图
这是一个相当技术性的问题，但它仍然是一个有效的问题。我有一个基于 AQGridView 项目的应用程序。有谁知道从单元格（objectatindex）获取 url，然后一次发送这些链接以获得第一个 pdf 页的缩略图的有效方法。之后，我需要做的就是将其设置为单元格的图像。我查看了 this 并发现它并不令人满意是非无效且不可分派的。我尝试过在 void 方法中调用它，但它试图立即解析每个链接，而且它们是非常大的 PDF。
A rather technical question, but it's still a valid one. I have an app based rather loosely on the AQGridView project. Does anyone know an efficient method for getting the url's from a cell (objectatindex) and then sending those links one at a time to get a thumbnail of the first pdf page. After that all I would need to do is just set it as the image for the cell. I have taken a look at this and found it unsatisfactory as it is non-void and un-dispatch-able. I've tried calling it in a void method, but it was trying to parse every link at once, and they are very large PDF's.
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没关系，Raphael Cruzeiro 的这个 项目 完美地说明了这一点。
Nevermind, this project by Raphael Cruzeiro Illustrates it perfectly.