I'm using UIImagePickercontroller in my app without problems. My SDK version currently is xcode 3.2.5. So far my test devices haven't ran into problems.
One of my testers (at long distance) is experiencing crashes whenever he/she tries to take a picture or choose a picture form the library, after clicking "use" the app crashes. He has IOS 4.3.3 installed. This tester has an 4G iPhone and an iPad, both of them actualized to the latest version, unlike my devices:
iPad 1G with iOS 4.2
iPod 4 with iOS 4.1
iPhone 3G with iOS 4.2.1
The crash doesn't happen on any of my devices.
I realize that i should upgrade my xcode and all my devices soon, but still would like to understand what could be the cause of the crash. I know it's not memory, because my old 3G can choose several pictures without problems, while my tester's iPad and iP4 suffer from consistant crashes every time he tries to select a picture.
Maybe has something to do with HDR ( which i'm not supporting or handling)?, Maybe a deprecated method ?, any important difference that may cause the problem ?.
Any hint or small suggestion to attack the problem is more than welcome. And sorry for my grammar errors.
Thanks !
Updated the devices and the problems are gone.
Really awful and awkward, the problem is solved but i won't ever know what went wrong !
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I have an app that shouldn't rotate unless on one particular screen.
The problem is that it is rotating on all screens, but the real big problem is that it only occurs when the users download the app from app store and are using it on iPhone 5, so I can't really find a way to test and fix the bug, since I wasn't able to reproduce it (in a development environment) so far.
I believe this is not an iOS problem since other devices with the same version are doing ok with the version I uploaded to apple through XCode, the bug really only occur when downloaded from app store and is installed on iPhone 5.
Any thoughts on what might be happening or how to fix it?
Thanks in advance!
I am building an iOS application for public release, and I would like to develop it against iOS 4, as I see from the instapaper stats from November that iOS 5 has a 48% market share, which is good, but my app will probably not be used by these early adopters, and it's probably not going to be enough to force them to upgrade.
The issue is that I only have an iPhone 4S, which shipped with iOS 5. I have been unable to find an iOS build for my 4S, which upon reflection makes sense. Nontheless, I'd like to know if there is some sort of unofficial build for the 4S or some way to make the iPhone 4 version work on the 4S.
I'm pretty sure that the answer is going to end up being "Buy a 3GS/iPod touch for development". Would that necessarily be worth it or should I just tough it out? I'm pretty sure that most iOS 4 users will upgrade eventually. Does anyone have any stats on how long it took iOS 3 users to move on?
I would still suggest getting a used iPhone 3GS. Even if you are able to install iOS 4 on the 4S you still wouldn't be able to do any performance testing, but it's highly likely that someone who still uses iOS 4 has a 3GS.
For your first cut testing, you can use the simulator which, will allow you to test for iOS 4.3
Ideally you need to get hold of the appropriate devices to test your app. You say you're supporting iOS 4, but do you mean 4.2 or 4.3? If 4.2 then you'll be supporting iPhone 3G, if 4.3 then 3GS upwards.
There are testing services out there, just search "iPhone testing services". I've never used them myself, so can't vouch for any of them, but the cost may be less than investing in actual devices.
I kept a 3G and 3GS for testing, but to be honest, even though my main app supports 4.2, I rarely do any testing for older OS versions outside the simulator. I gave the 3GS to my father on condition he tested for me when asked… but of course I had to upgrade it to iOS 5 for him, so it's of little practical value, apart from testing at different screen res.
I would suggest you develop your app with minimum version 4.0 (or other) set. Then you test that on your iOS 5 iphone. I did it with my apps and it works great.
You can test on the lower version simulator or for final testing you could borrow a friend's device or similar.
As I understand (and believe), the compiler would stop you if you included features that are not 4.0 (or the set version) compatible.
Buying lower iOS is not worth it. If you can you should borrow it. In the simulator you can also make the iOS version to lower version to test. Also you can try ad hoc distribution to check how your app performs on other ios before releasing on appstore
I released an iPhone/iPad app some weeks ago. From 15 reviews (worldwide) I got a dozen 1 star reviews from users saying the app does not work, they only get a blank screen. The other three are happy and it works for them.
I tested the app on an iPad 1, an iPad 2, an iPhone 3GS and several iPhone 4s - it worked on every device flawlessly. And it passed the app store submission process, so it must have worked at Apple...
The crash report in iTunes Connect is empty - the app obviously does not crash, it just hangs somewhere.
Unfortunately there is no way to contact the users where it doesn't work :-(
I know its really hard to help with that less information, but I don't know what to do when I can't replicate the problem on my side...
So does anybody has any idea?
If its a memory problem - shouldn't the app crash then?
I use AVFoundation to play a movie and I know of some flaws since its a relatively new library - does somebody know of this problem (a blank screen) in relation with AVFoundation?
It would be helpful as well if you could download the app (the name is "Hyperactive") and test if you get a blank screen. If so I would be glad to learn the exact device and the iOS version. I hope this is not missunderstood as spam, thats not what I intend...
Thanks in advance,
best regards,
Walchy
This is a longshot, but maybe the user had the application running for a long time, receiving a viewDidUnload, and something you unload is not getting reloaded on the viewDidLoad.
Try running a "Simulate Memory Warning" on the iphone simulator options.
Both iPhone and iPad versions work fine on iPad 1.
Application won't install on iPhone 3G with iOS 4.2.1.
Have you tested your application on a jailbroken device?
It turned out that the black screen only happens on an iPod Touch and the solution is very easy:
You need an additional entry in the .plist file for the iPod Touch:
Main nib file base name ...
iPod Touch 4G thinks it's an iPad
I've upgraded my iOS on iPhone 3G to 4.1 and now I run my app on the device.
Firstly, I couldn't install it becouse Xcode was saying I don't have certification etc. (I have jailbroken iPhone). Finally, I succeeded and installed it.
But know something strange happens....
After I had installed my app on the device I run it.
Then, "cocos2d" image appears on the screen and just a second later device switch off! It simply reboots.
What's more - when the device launchs again and I run my app - it works!
I have no idea what's going on. This app works fine on 3.1.3 iOS (even with the same Xcode - 3.2.5)
What should I do?
Do you think the problem is caused by Xcode or iPhone itself?
Maybe reinstalling Xcode may help?
It could be one of two problems.
It could be a problem with your device. Maybe something got sort of wonky with your jailbreak.
Secondly, it could be a problem with your app. Maybe it's crashing. Have you checked your crash logs?
I have an iPhone App published for a while, developed under the SDK3, and everything works great. Some weeks ago, when Apple released the SDK4 I made some changes to my app to support multitasking (it plays audio in the background).
In my simulator and my device (iPhone 3GS iOS4) the app runs great, there is no problem at all. But, now when I submit the update, a lot of users are contacting me because they say that the app freezes on the splash screen and after waiting about 40-60 seconds, it crashes.
By asking to the users, I have determinate that the problem is only in those devices that haves iOS4 (iPhone 3Gs and 4G).
I tested the app over and over in my simulator and my device but it never happens to me!! Some one have any idea or information about this?
I will really appreciate it. Thanks.
After search for the crashes, and try over and over, I can't reproduce the bug on
my devices. So, I decide to start reading at the Apple Developer Forums and I
found a thread where my suspicions are affirmed: this problem is caused by an internal
iOS4 bug.
"There's a bug in the App Store's code signing process. Talk to DTS: they can
help you with the workaround. Mention rdar://7909951."
"...but it should be the cause of nearly all "failed to launch in time" inside
libobjc:_mapStrHash..." (This appears in some of my app crashes)
Here is the link to the post: failed to launch in time in iOS4
There is no certain solution, but some suggest that a start is changing from arm6 to arm7 and try.
You can try changing some code in the app for producing a different binary and submit it again.
I hope it can help anyone else.
Check the crash report on itunesconnect.apple.com
iPhone 3G also supports iOS 4, except it "doesn't support multitasking" (presumably due to lack of RAM?). If you're only seeing crashes on the 3GS and 4, then that might be the issue.
Default.png is shown on launch, but it's also shown on the foreground when the OS didn't manage to get a screenshot while backgrounding, or for various other reasons (e.g. your app was launched with openURL, so the UI is likely to be different).