Question

I read something about multi thread access on DB but still not sure best way to do that for reading/writing in conjunction with async network download. For instance I will have a page with images from the web, so I m retrieving them by their URLs, using AFNetworking but I want to check first on my DB and write on it (or disk) the retrieved image for future use. What can be the best way to do that without blocking the UI (like when scrolling)? If I do that with a singleton that reads/writes it block the main thread. Thanks for any tips on that.

Answer 1

AFNetworking is not the tool for that. Instead, you can take advantage of the built-in functionality of NSURLCache--specifically Peter Steinberger s fork of SDURLCache.

在-applicationDidFinishLaunching WithOptions:, do NSURLCache +set CommonCache: with an instance of SDURLCache (有一部分磁盘空间得到分配)。通过<代码>UIWebView(和AFNetworking就这一事项提出的所有要求,将自动通过<代码>NSURLCache<>/code>进行,然后才能对切身进行检查。它不言而喻, drop落,正确遵循切令,应该非常公正地解决你的问题。

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