Offhand, I'd say the caching does seem a bit unpredictable. My guess is that at some point the user has done enough stuff elsewhere on the iPhone that the memory space for the web cache and/or Safari is freed up and the page must be reloaded.
I mentioned the unpredictability of the Safari cache to an Apple developer at the iPhone Tech Talk and he advised me to file a bug (which I did). You could also consider filing a bug with Apple but to be honest I'm not optimistic this would be high on Apple's priority list no matter how many people log bugs against it. Best, Ishan On 9/6/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > Try this: > > Here's the equivalent of a hello world HTML file - > > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http:// > www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> > <HTML xmlns="http://www.w3.org/1999/xhtml";> > > <HEAD> > <META http-equiv="Content-Type" content="text/html; > charset=iso-8859-1"/> > <META name="viewport" content="maximum-scale=0.6667; width=480;"/> > <TITLE>Alive!</TITLE> > </HEAD> > > <BODY> > Look - still here! > </BODY> > > </HTML> > > > Serve it to the iPhone from your web server. Shut down the iPhone. > Shut down the web server. Start the iPhone and look at the browser. > > When I do this with my phone and my web server (which might be > relevant given that it could serve different headers than yours), the > page is still there. No reload occurred. > > Perhaps this is a bug in the browser - I don't know. But it seems more > of a caching issue to me. Assuming "correct" HTTP headers and/or meta > tags, one would hope that the data would come from the cache. My > question is more: what would those "correct" settings be? > > I've also read in places that there is not much cache space available > - or that caching works rather unpredictably. Could that be it? > Anybody have experience and reliable info about that? > > > On Sep 6, 11:47 am, Jake <[EMAIL PROTECTED]> wrote: > > when you shut down safari, you quit... refreshing when you come back > > is a feature, not a bug. > > > > Now, if you've installed an apache server (I have) on your iPhone... > > refreshes will be that much quicker! > > > > On Sep 6, 2007, at 11:36 AM, [EMAIL PROTECTED] wrote: > > > > > > > > > It refreshes as a white page if the web server is not available. > > > That's what I'd like to avoid. I don't want the browser attempting to > > > refresh the page unless the user explicitly requests it. > > > > > You don't have to be on the iPhone straight for a day. The scenario: > > > load a page, shut off the phone and shut down the web server. If you > > > turn the iPhone back on and go to the browser, the page is still there > > > - and obviously, no attempt was made to contact the web server. Now if > > > you try to look at the page a day or so later with the web server > > > still down, it may or may not still be there. The browser may try to > > > refresh it automatically, resulting in the blank page. > > > > > This issue has been obliquely referenced (i.e., without resolution) in > > > other posts. For example, > > >http://groups.google.com/group/iphonewebdev/browse_thread/thread/ > > > 677f779772b53a3b/08b6e4f67485edcd? > > > lnk=gst&q=reload&rnum=10&hl=en#08b6e4f67485edcd > > > > > On Sep 6, 11:24 am, Randy Walker <[EMAIL PROTECTED]> wrote: > > >> So your'e saying your page refreshes after a day or so? Who is going > > >> to be on a page on an iphone straight for a day? I'm interested in > > >> why It refreshes as a white page instead of showing the content > > >> again. > > > > >> -=Randy > > > > >> On Sep 6, 2007, at 11:12 AM, [EMAIL PROTECTED] wrote: > > > > >>> Typically a day or so - which is why I thought it might have been > > >>> "expires" related. This doesn't happen with just my apps - but also > > >>> with other sites. For instance, Facebook (iPhone version), comcast's > > >>> email (iPhone version), the game "Avalanche", etc. > > > > >>> Nothing timing out in my code that I know of - no setTimeout() > > >>> calls, > > >>> if that's what you mean. No event handlers except for a body tag > > >>> unload handler which is just a stub right now. > > > > >>> On Sep 6, 10:13 am, Randy Walker <[EMAIL PROTECTED]> wrote: > > >>>> How long before the page refreshes? I've never had that happen. > > >>>> Are you > > >>>> sure you don't have something timing out in your code? > > >>>> -=Randy > > > > >>>> On 9/6/07 10:02 AM, "[EMAIL PROTECTED]" <hiroshi- > > >>>> [EMAIL PROTECTED]> > > >>>> wrote: > > > > >>>>> Anybody know if there's a way to force the browser to reload a > > >>>>> page > > >>>>> ONLY when requested to do so by the user? Right now, the browser > > >>>>> automatically attempts to reload the page (blanking it) if the > > >>>>> user > > >>>>> has been away from it for awhile. I'd like to have the page remain > > >>>>> intact even if no internet connection is available. > > > > >>>>> I've tried a few header and meta tag settings (pragma, cache- > > >>>>> control, > > >>>>> and expires, for example), with no luck. > > > > >>>>> Any ideas? > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "iPhoneWebDev" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/iphonewebdev?hl=en -~----------~----~----~----~------~----~------~--~---
