On 4 Feb 2014, at 01:35, Matt Neuburg <[email protected]> wrote:
> On Fri, 31 Jan 2014 15:09:37 +0700, "Gerriet M. Denkmann"
> <[email protected]> said:
>> The real problem is: iOS 7 ignores the first tap (if it comes too soon
>> after applicationDidBecomeActive: - "too soon" meaning: less than about a
>> second).
>> Whereas iOS 6 records and processes all taps.
>
> I've noticed often, just in my ordinary iOS 7 life, that there is a problem
> with the system's handling of the showing and removal of the snapshot image
> (taken when the app was backgrounded and displayed as the app is
> reactivated). It takes a _very_ long time for this image to be replaced by
> the real interface, and meanwhile the app is not responsive because you're
> not _in_ the app: you're tapping on the snapshot. I wonder if that's what
> you're experiencing. m.
My test app has a UILabel (called lastLine) at the bottom, and a button ("Tap
Me") below it.
In applicationWillResignActive: I do:
rootViewController.lastLine.text =
@"#####################################################";
In applicationDidBecomeActive: I do:
rootViewController.lastLine.text = @"Now!";
I start the app on iPad
Put the iPad to sleep.
Wake the iPad.
"slide to unlock" (now I see "#############" getting changed to "Now!" after a
fraction of a second)
When I see either: (A) "Tap Me" or: (B) "Now!" I tap the button 4 times.
In case (A) only 3 button hits get recorded.
In case (B) all 4 button hits get recorded.
The button hits are spaced by about 0.2 seconds.
This seems to imply that when the applicationDidBecomeActive there is a time of
about 0.2 seconds, where it LOOKS responsive, but really it is NOT.
Maybe what I see is just (as you suggested) the "snapshot image", not the real
test app.
In a real app the following happens:
applicationDidBecomeActive
I see an obviously functioning button and tap it.
Nothing happens.
After about a second I realise something is wrong and tap the button again.
Now I get the expected reaction.
I curse the app, because the button is unreliable.
None of these problems occur with iOS 6.
Kind regards,
Gerriet.
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