App freezes, and the device freezes sometime during launching or closing. This happens especially to the app developed and installed using Xcode. Can anyone explain what's going on, if it's iOS 4 Gold Beta specific issue, or a generic task must be handled by a developer?
Use the Debugger, Console and NSLog() statements to track the progress of your application throughout its life. This will help you track the bug in your application.
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I know this is weird question but I am not getting why this is happening.
When I run app for testing on my colleague iPhone he starting complaining that his iPhone hangs for 2-3 seconds sometimes.
At first, Colleague iPhone was not set for development. I activated the development.
Note:
Hanging process starts anytime. Not necessary when he open that app.
Also his iPhone is registered with another apple accounts also (means different account provision files)
Have iOS 6.1.3 on colleague iPhone.
The problem is colleague iPhone started hanging after I activated the developer account.
Someone have any idea why this is happening?
This is something wrong, but this is happening.
I am encountering a strange behaviour, my app runs smoothly on simulator but crashes on device.
Also when i try to detect leaks using instruments it just crashes on both simulator and device.
I am totally stuck as i am not even able to generate any error message on console, also NSZombieEnabled is on in the settings.
I can see two possible reasons for the behavior you describe:
device is short on memory; (but you would see some processing in this case)
your app uses a newer SDK than what you have installed on your device (like using the SDK 5 twitter framework and then running your app on an SDK 4 device).
Specifically, in case 2, you would not see any log messages because the app would fail as soon as it tries to load the missing framework in memory.
In any case, inspect the device log in Xcode Organizer window to have more info about the crash. This is the only way you can understand what is happening.
I would like you to help me here.
I'm developing an app that works in the background. It's a location-based app and I think I'm going crazy because when I'm debugging the app in the device it works perfectly, I make it sleep I wake it up and I works as expected. Then I unplug the device from the computer and I put in my pocket and whenever I open it, it sometimes works and other it doesn't, I'm talking about several hours in the background.
Are there any known issues about this? My device is running iOS 5.0 and I'm developing for iOS 4.0
Thanks
Applications in the background are handled by iOS. Therefore if iOS "thinks" that it needs memory it maybe frees some of the memory your app needs to run.
Have you tried to look into it with Instruments?
am new to the ios application development.
I had developed an application on iOS platform using 4.3 SDK.
When it runs on simulator or a device, if we are trying to press on the application icon again after quit the application at run time, the application is again starts its execution from the begining, not from the previous stage it has stopped.
By going throgh the documentation i came to know the multitasking facility is inbuilt for an iOS application.
Or we need to do any coding for implementing this multitasking facility.? Experts please help.
Thanks in advance.
Basically you should be able to go background and then foreground when using the simulator. remember that when running on simulator the GDB debugger is attached to the process thus you cannot terminate the app and start again but you can go background and start again. I think there is a good chance you are crashing and that's why the app starts again. Try to implement the app delegate methods "didResignActive" and "didBecomeActive" and make sure you manage the saving of the state correctly there...
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).