Kommentare zu: NSURLCache Joke / iPhone

Von: Scott Logic » A Webapp By Another Name II – The many pitfalls of using the application cache on mobile platforms

Fri, 23 Sep 2011 08:43:02 +0000

[...] iOS in such a way that it will fail silently. This has been widely reported e.g. here, here and here. Obviously without disk caching of the resources, as soon as your app is closed (or at any time [...]

Von: A Webapp By Another Name II – The many pitfalls of using the application cache on mobile platforms | Chris's Excellent Adventure In JavaScript

Fri, 10 Jun 2011 16:36:31 +0000

Von: somebody

somebody — Sun, 26 Sep 2010 14:33:03 +0000

> Still, I can’t understand why this support have been removed for this platform….

maybe because they want to save flash memory life resource?..

Von: mro

mro — Thu, 18 Mar 2010 20:48:33 +0000

Nice work, Olivier! Full ACK, I don’t understand that either.

Von: Olivier Poitrey

Olivier Poitrey — Wed, 17 Mar 2010 10:15:51 +0000

I’ve created a lib aimed at giving on-disk caching support back in NSURLCache. You can find it at http://github.com/rs/SDURLCache

Still, I can’t understand why this support have been removed for this platform at the first place. Wouldn’t have been better from Apple to just set disk cache capacity to 0 by default and let developers to decide if he needs it or not?

Von: Paul Lancefield

Paul Lancefield — Mon, 08 Feb 2010 12:40:55 +0000

Yep that’s true. The iPhone uses an in memory cache – which is kinda limited and won’t store to “disk” (flash memory). But UIWebView still checks the cache for these pages that can’t be stored. But this behaviour is good because

1) In memory caching is better than nothing.

2) You can override the shared cache class to change the behaviours and you could implement your own caching scheme if you really want to and it will then be used by UIWebView.

3) at any time in the future if the “disk” cache is enabled, UIWebView will get the benefit. So for example, on the iPad you may find “disk” caching enabled by default (I don’t know I haven’t checked – but it’s an example) in which case your iPhone apps will benefit from it when running on the iPad.