iOS 开发的过程中少不了要做项目文档。文档生成工具有3种，docxygen，headerdo，appledoc。这里主要介绍如何使用苹果官方文档风格的 appledoc 工具。

This library provides a category for UIImageView with support for remote images coming from the web.

Purpose

FXBlurView is a UIView subclass that replicates the iOS 7 realtime background blur effect, but works on iOS 5 and above. It is designed to be as fast and as simple to use as possible. FXBlurView offers two modes of operation: static, where the view is rendered only once when it is added to a superview (though it can be updated by calling setNeedsDisplay or updateAsynchronously:completion:) or dynamic, where it will automatically redraw itself on a background thread as often as possible.