I'm developing an iOS app with core data.
Every time I kill the app (by pressing the home button twice and kill)
then when I load the app again, the view is the same as before (maybe because it was restored successfully) but it's stuck without any error... if I press home button again then the screen becomes black and I can't see anything....
just the threads in Xcode and the status is "running"...
Anyone has an idea? or somewhere to start digging in?
Thank you!
I know this problem. It is because of Xcode 4. Here's the deal => Try running the App in the iPhone/iPad and you will not have that problem.
From my experience, the problem exists with the iPhone simulator and it works on the device !!
Related
Our company has an app which is basically an eBook reader.
We use the RMSDK to perform book downloads & read.
Now, something very strange is happening in iOS7 devices (not in the simulator):
I download a book using the fulfillment method in the RMSDK
I wait for the book to finish downloading. The book is saved in the NSCachesDirectory (for App Store guidelines reasons) - so far, everything works fine
I hit the home button, the app moves to the background
I hit the app button to bring the app back, that's when the problem happens:
The app gets completely stuck. Hitting the home button does nothing, hitting the power button shuts down the screen, but then hitting the power button again does nothing.
The device itself has effectively crashed.
After a few minutes, the Apple logo appears on the device and the device comes back to life after a reboot.
I have no idea what in my code could be causing the device to act this way. Shouldn't the iOS7 sandbox prevent me from being able to crash the whole device?
Any ideas on why this could be happening and what I can do to prevent it would be greatly appreciated.
EDIT:
I placed a breakpoint on the -(void)applicationDidBecomeAcvive: method in the AppDelegate, and it's not being called when clicking on the app icon in the last phase before the crash.
EDIT:
The RMSDK is using libcurl to download the books. Could this be a cause for this behavior?
EDIT:
The problem is happening if I click on ANY app after I click on the home button, not just on the same app. So for example, I click on the home button, then I try to open Fruit Ninja, and the device crashes.
We managed to solve this issue by disabling functions in RMSDK, which call mkfifo(). I'm not sure how much I can say here due to NDA but they're all located in one file and can be cleanly converted to no-ops with a nice preprocessor #if defined()
Its an OS level bug. iOS 7 is still unstable in areas, for example my Apps report crashes in places that are part of iOS 7 itself and couldn't be caused by my app.
I have a problem with Xcode 4.4.1 .
My Simulator becomes translucent black and hangs without any proper log message when I pressed a login button of my application after app launch.
Sometimes application or Simulator hangs just after the launch when I pressed the button or Sometimes it hangs after few second I request a network call with in application.
No pattern .. no message to trace. Tried many things like Xcode restart ,System restart and Clear logs and deleting temporary iPhone Simulator files in Library like that .
I am not able to get what is happening . Does anyone suggest me solution to get out of this.
Or Does somebody know the reason why this is happening. I mean its the application problem i.e in code or the Xcode or iPhone Simulator App problem.
Any help would be really appreciated.
I faced the same problem last day. I got it working after I have done the following, not sure which step did the trick.
Reset the simulator contents.
Quit simulator
Delete derived data of the project from xcode.
Restart xcode.
Hi in my iPhone app if use for sometime and click home button of iPhone and then again tries to reopen app app is launching from beginning its not suspending(its not pausing and playing),but sometimes it works fine, in all of iPads it works fine.
What may be the reason for this any help is thanks in advance.
You might have opted out of background execution by specyfing the key 'UIApplicationExitsOnSuspend' as YES in your applications plist file. See the attached image (iOS 5) and check your application's plist.
And as you have specified that it happens only sometimes I assume that it may be an application crash.
When I create a window-based-application (in Xcode 4, via simulator and iPhone device, even if don't add anything to the project or the window),
if I kill the app, when I open it again the view is frozen and when I click the home button it disappears into a black window and I can't do anything...
What is the problem?
Thank you!
check if the application is running in background, it should be in your plist.
that will be a start, if the problem is still there u should post some of your code.
hallo, i am newbie in developing iphne/ios application and i have
encountered some problem
generrraly my app (which is iphone camera image processing app) has no
visible errors at today stage except the one
when i press the home button to send my app off screen (putting to the
background), and then press the app icon to 'wake it up' again
it crashes
what would it be...? what the reason of it would be?
what is done to my app (seen from the view of programmer
- i mean internal game state) by this home buton operation?
- what i should take care of before "applicationDidEnterBackground"
eventually?
thanx for answer
Is this happening when you are running it from Xcode? Xcode does not like it if you hit the home button and start it again from within the device/simulator. Is it crashing if you launch it from the device (or simulator) without Xcode running? If not, then there probably isn't a problem.