什么时候应该删除iPhone应用程序中的缓存数据？ [英] When should we delete the cache data in an iPhone apps?

问题描述

我们经常缓存图像和数据，以提高iPhone应用程序的性能。但是，您使用什么策略来管理高速缓存数据，例如删除或更新高速缓存数据呢？

We often cache image and data to improve our iPhone app's performance. But what strategy do you use to manage the cache data, such as delete or update it?

我将图像保存到TMP文件夹中，但是不知道何时应该触发检查过期的缓存数据并删除它：iPhone应用程序何时启动，退出或处于空闲时间？

I saved the images to TMP folder, but don't know when should I trigger to "checking out of date cache data and delete it": when the iPhone apps starts, or quits, or in idle time?

推荐答案

感谢您的回答。
我同意在开始或退出时检查是否删除缓存会降低程序的性能。此外，退出时间还用于保存程序的状态。

Appreciate for your responses. I agree that checking for delete the cache at the start or quit time will reduce the program's performance. Moreover, quit time is also used for saving the program's state.

在1分钟内检查空闲时间的想法还可以，但是我必须建立一种机制来检查在应用时间内每15秒空闲一次。我认为这并不容易且对性能没有好处。

The idea to check for idle time in 1 min is quite ok, but I have to build mechanism to check idle for every 15 s during the application time. I don't think it's easy and good for performance.

最后，我决定在检索新项目（数据和图像）后执行检查并删除缓存 。我将检查不再需要显示的项目（数据+图片）并将其删除。我认为保存缓存的功能也将删除缓存是有道理的。
当然，我将在另一个线程中执行此操作，以避免冻结接口。

At last, I decide to perform "check and delete cache" after I retrieve new Items (data + image). I will check for items (data +image) that doesn't need to be displayed anymore and delete it. I think it makes sense that the feature who saves the cache, will deletes the cache also. Certainly, I will do this in another thread to avoid frozen the interface.

这样好吗？请给我您的意见。

Is this good? Pls give me your opinions.

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