iOS5.1 and 5.1.1 pinch zoom sensitivity bug

Discussion in 'iOS 5 and earlier' started by Ashin, Mar 19, 2012.

  1. Ashin, Mar 19, 2012
    Last edited: May 23, 2012

    Ashin macrumors 6502a


    Jun 19, 2010
    First thing I noticed when I installed iOS5.1 was this bug, and others have noticed it too, I know the Apple apologists will deny its existence but here is what everyone is experiencing -

    - Put two fingers on screen
    - Slowly pinch to zoom
    - Notice that it now takes about 0.5cm of movement before it starts to zoom

    This never happened previously, in fact I have my girlfriends iPhone here and hers zooms instantly upon first movement

    What gives?

    You can try it yourself in Safari/Photos

    In b4 "hurr durr do a restore" etc, we've already tried that
  2. Kyotoma macrumors 68000


    Nov 11, 2010
    Carnegie and Ontario
    I'm not experiencing what you are describing. Even so, I would suggest that this is in place to account for user error.
  3. Ashwood11 macrumors 65816

    Nov 10, 2010
    Not a problem on my iPad on iOS 5.1 with either Safari or Photos. You say "everyone" is experiencing this but your girlfriends iPhone is not?
  4. QuarterSwede macrumors G3


    Oct 1, 2005
    Colorado Springs, CO
    It's happening on mine but, to be honest, I never noticed if it didn't do that on pre iOS 5.1 or not.
  5. Arelunde macrumors 6502a


    Jul 6, 2011
    CA Central Coast
    The delay factor must be a result of moving fingers very slowly as soon as you touch the screen. If you put your fingers on the screen and wait 1/3 second, then spread them slowly, it's instantaneous.
  6. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    Nope, still slow.

    I have my girlfriends iOS5.01 iPhone 4 here and my iOS5.1 iPhone 4 and they are very different in the sensitivity.
  7. PaulyD macrumors 6502


    Nov 16, 2010
    This is what happens to me.

    Never noticed it before and never bugged me in the slightest. I really would imagine they would include the delay to make sure you don't accidently zoom in the moment another finger etc touches the screen.
  8. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    Bump, still happens in 5.1.1

    Tested it with 2 different iPhones, both DFU restored and set up as new.

    Pinch zooming works fine if you press fingers against screen quite heavily, but light touches are missed or take a few milliseconds to respond.

    Results in random cases where you go to zoom in or out and it barely moves at all... and precise zooming can be a pain.

    Downgraded back to 5.0.1 and works flawlessly like it has done for the last few years
  9. Ruger141 macrumors newbie

    May 23, 2012
    Good catch, I definately experience this on my 4s. I unconciously noticed it but didnt really think about it much. Now that I try you method though it is very obvious.
  10. Nermal Moderator


    Staff Member

    Dec 7, 2002
    New Zealand
    It happens on mine too... but I don't have a problem with it. I had resized items by accident in the past, and now that I'm thinking about it I haven't had that issue recently.
  11. twigman08 macrumors 6502

    Apr 13, 2012
    I'm a 5.1 Jailbroken device and I only "notice" (only because you brought it up so I tested it, would had never noticed or cared [I still don't really] if you wouldn't had said anything, lol) it if I go and pinch to zoom as soon as I touch the screen. If I touch the screen for about half a sec, it doesn't really do it.

    maybe it's not really a bug and it's there to keep you from re-sizing stuff so easily? Just a little thought.
  12. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    Same here, I kept thinking "why hasn't my iPhone zoomed as far as I expected", I suppose you get used to a very predictable level of zooming.

    But it wasn't documented as a change to make it so you don't accidently zoom, therefore I consider it a bug. If they were to change something after all these years I would expect something in the update notes.

    As above, I'd have expected update notes if it was a genuine change. Maybe it depends on how you use your fingers to zoom, for me it really bugged me... upgraded to 5.1 then downgraded, then tried out 5.1.1 and downgraded again. Looks like maybe stuck on 5.0.1 for a long while now

    Possibly explanation as I saw on the official Apple forums is the new iPad 3 resolution, maybe some figures for zooming were changed for the iPad 3 due to the resolution change (eg, once your fingers move x pixels start to zoom, so a higher level of pixels before zooming is instant on the iPad 3 but takes a little while on a lower resolution) which seems like a possible explanation, but who knows
  13. AlphaVictor87 macrumors 6502a


    Sep 7, 2011
    Saint Louis, MO
    sorry i wasn't going to comment on this thread, but if you are seriously not wanting to update your phone until they release notes that say "photos zoom the instant you pinch" i have a feeling you are going to be waiting a long time.

    That's a bit ridiculous

    In my opinion, the lag is so they can determine if you are really pinching or spreading or moving left or right.

    Go ahead try it, it has the same "lag" if you move left or right too.
  14. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    My reason to not update is because it is annoying, and a change from how it has been since the iPhone was released.

    I don't understand you, you're not the least bit bothered Apple changes something without saying? To me, if this was deliberate, it is something they would put into the release notes
  15. pblakk macrumors member

    Apr 8, 2012
    There IS a delay. Ashin is right. I never noticed before. I bet it's designed to prevent constantly pinch zooming too easily.
  16. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    It's all well and good justifying the change, but if it isn't a bug and is really intended... I think we should have been told, and be given an option to disable it.

    How about General> Accessibility >Accidental zooming/scrolling protection - On or Off

  17. treichert macrumors 6502

    Nov 7, 2007
    Aachen, Germany
    Why do you have to start off with an insult?

    On topic:
    Can not reproduce the issue, did you file it with Apple via
  18. ThatsMeRight macrumors 68020

    Sep 12, 2009
    I am experiencing the same thing. I thought it was imaginary... and that it was always there.

    I have noticed the same thing and it is annoying as hell!
  19. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    Glad more people notice it.

    I couldn't quite figure out the problem when it wasn't zooming in as far as I had expected it to, or even not at all... but I knew for sure it was a problem in iOS5.1 since it never occurred this frequently before.

    I suppose some people are either just not very aware of these little things, or assume it is something they are doing wrong
  20. xaanaax macrumors newbie

    Jun 10, 2012
    This is exactly the same bug that I also first noticed after upgrading my iPhone 4 to 5.1.1. It is soooooo annoying - it is like this iOS is slower than the previous versions:(
    The revolutionary thing about iOS is that it responds to the user input immediately - that is why it is the best and this bug breaks this feature.

    I noticed it first in Safari, then in "maps" app. Besides the delay - the zooming is now much slower than before.

    My girlfriend has got the same bug in her iPhone 3GS.

    Ashin - please report this bug to the apple - it has to be fixed ASAP.
  21. ThatsMeRight macrumors 68020

    Sep 12, 2009
    I agree. I have reported the bug and I am asking everybody who is annoyed by this to do the same thing. It might help.
  22. Carlanga macrumors 604


    Nov 5, 2009
    instead of fighting here, you should have sent a report a long time ago if this is truly a bug.
  23. ChrisWard1994 macrumors member


    Sep 13, 2011
  24. Ashin thread starter macrumors 6502a


    Jun 19, 2010
    Still happens.

    Luckily I am still using 5.0.1 though ;)

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