I find out app crash frequently, and it is caused by some error in JavascriptCore framework.
As you see, these crashed all happened on iOS 10 and iPhone5/5c. So I doubt that the system has some bugs. Can anyone help me to get a solution?
After long time testing and exploring, I have fonud it is caused by low memory issues with UIWebView on iOS 10. I believe it is a system bug, and I replace UIWebView with WKWebView in my application. And now the crash never happened any more.
Related
I have an app for iOS 6.x. I have tested memory allocation for this app couple of times using Instruments. Almost every time Live Bytes right after the app launch were 872 KBs approx.
Then I ran this app on iOS 7 using Xcode 5-DP5 without doing ANY changes in the code. I saw the app was very slow as compared to iOS 6. I ran the Memory Allocations in Instruments just to find some dropping dead results. Live bytes right after the app launch: 49.8 MBs, which approximately 59 times. Please see the screens if that might be of any help:
AFAIK nothing specific to memory has been mentioned in the iOS 7 docs. Moreover my app is ARC enabled. Does anyone know about this huge increase in live bytes on iOS 7? Is there a specific reason on iOS 7 for this? Or is it just because of beta release?
This was due to the Developer release of the SDK. It got fixed when the GM seed version came in.
I have been working on an iOS app. It was working fine until a couple of days ago, it started behaving strangely. The app crashes on production but it creates no crash logs. However, when same scenario is tested out in QA, it works fine. Now I have been trying to find out the reason but without any crash logs or crash in debugging mode, it has become very difficult for me.
Any suggestion, how to tackle it?
Thanks!
P.S. I am using XCode 4.6.1 and app is for iOS 6.0.
Answering my own question, I have found out after detailed research on the internet that some crashes kill the application before logging the Crash Log. My error was that of a delegate property for my services. After long hard tries, I got to the root cause of the problem, since I had converted the code to ARC so the delegate property was unsafe_unreatained, which released the delegate while it was still in use by the service, so I just had to convert it into strong and set it to nil in dealloc. Further description can be seen here: https://stackoverflow.com/a/9065105/1351911.
I had the same problem, building ipa's in Xcode 4.6.1 with sdk version 6.0 or above crashes the app like anything. Try archiving it in Xcode 4.4 or 4.3 may be a lower version and try.
My app is working fine for iOS 5.1 simulator and less but its getting crashed for ios 6 simulator. No changes done in code for both versions. At debugging this error appears:
[unknown]Not safe to look up objc runtime data.
After googling i found this link.
Not safe to lookup objc runtime data
but nothing helped right for me.
Any help would be greatly appreciated
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 !
I am using instruments to check for memory leaks in my app.. iOS 3.1.x doesnt show any leaks.
However, when I do the same test on iOS4 iPhone I am getting leaks from CoreGraphics library.
Did anyone had similar problem? is it problem in the OS itself?
Many thanks
With so few details, it's hard to say exactly. I have, however, experienced SDK version-dependent leaks and other misfeatures with iOS code, comparing 3.0 to 3.1 and 3.1 to 4.x. I think the iOS SDKs are relatively buggy compared to what I expected (very polished Apple APIs).