在iPhone应用程序中缓存图像 [英] Caching images in iPhone app

问题描述

我的iPhone应用程序具有内置的RSS阅读器.有图像，我想找到一种在系统上缓存它们的方法，但是让系统管理缓存并最终清理.

My iPhone app has a built in RSS reader. There are images and I'd like to find a way to cache them on the system but have the system manage the caching and eventual clean up.

有没有办法做到这一点?

Is there a way of doing this?

推荐答案

Three20 进行了不错的图像缓存.您不需要其余的内容，只需查看TTImageView即可，它是UIImageView的直接替代品.你只是做

Three20 does decent image caching. You don't need the rest of it, just look at TTImageView which is a drop-in replacement for UIImageView. You just do

someImageControl.urlPath = @"http://example.com/your/image.jpg";

然后TTImageView处理其余部分，包括在磁盘上进行缓存等.

And TTImageView handles the rest, including caching on disk etc.

我自己在使用此方法时只有两个小问题:

I only have two minor problems with this approach myself:

• 由于某种原因，即使图像是有效的JPG/PNG，它似乎也无法加载所有图像格式.尚未调试.
• 我不确定它如何处理清理部分.我注意到有些图像有时会从缓存中消失，并从网络中刷新，但这并没有打扰我进行调查.它有效".

TTImageView还有其他一些不错的属性，我不必浪费时间，例如，有一个占位符图像可以随您的应用一起提供，直到显示出从网络加载的真实图像为止.

TTImageView has some other nice properties that I don't have to waste my time on, e.g there is a placeholder image that you can ship with your app that is shown until the real image loads from network, etc.

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