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How to prevent EXC_BAD_ACCESS from crashing an app?
(3 answers)
Closed 7 years ago.
How does EXC BAD ACCESS occur ?
Is it regarding the situation while we are trying to access a variable that is already released ?
As the name signify this error comes when application is trying to access a memory location that does not exists (majorly caused when trying to access a object that is already released). You can get a detailed explanation here.
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Memory leak detection tools
(11 answers)
Closed 6 years ago.
Totally new at Swift 2.
How can I check for Memory Leaks in my app designed in Swift? I was checking in Google but there are too many documents on it. I'm using Xcode 7, do I have to download any tool to do this?
Thank you in advance.
Kindly go through this tool provided by apple.
Instruments
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I've a tabbar application with three tabs. On third tab there is a navigation controller and account setup is done there. Once the account setup is complete, I pop all the controllers on that tab and change the selected tab to first. But after then when I select the tab to third, application crash with message "message sent to deallocated instance 0x15d17cc0". This issue occurs only on iOS 7 and not happening on iOS 6 or below.
Add Exception Breakpoint from Breakpoint Navigator and find what that instance is. Most probably your problem is a simple memory management problem and it will be fixed when you autorelease that instance instead of retaining at first.
Edit: Also you can look at this great answer
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i was creating an app that have sliding menu. it reads data from rss using xml parsing and reads data from dashboard using JSon.
my problem is that i got EXC_BAD_ACCESS in main.m and in debug area, there is no exception log...
features are works perfectly. but suddenly app crashes with this exception.
am using Xcode 5 with arc.
is this any kind of memory issue. how can i resolve this?
i read some article related to memory management. but that are not much helpful...
pls help me....
You can try to add "Symbolic Breakpoint" and check where is the problem
This is instruction how to set breakpoint in xCode 5
Too little information to solve problems
This could be because:
The pointer used to point to memory that was ok, but its chunk was deallocated.
The pointer is corrupt.
Read this.
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When I try to submit form data I get this following error
Internal Server Error expected Array (got String) for param `id'
Earlier it was working fine, I have made few changes in the text fields class and Javascript. Please explain the above error and solution to it.
Solved : All the ID's were not unique that is why I was getting this error
Please explain the above error and solution to it.
The above error is because you're passing a string somewhere in your code where you actually expect an array.
The solution is to find the place that you're passing the string rather than the array, to then trace through your code to find out how it is that you're managing to pass a string rather than an array, and then to fix the code so that you properly pass an array rather than a string.
Without additional code and context, the question is impossible to answer further. If you've been following proper source control procedures, you might consider using git bisect or your SCM's equivalent to locate the commit in which the bug was introduced.
This question already has answers here:
What does #synchronized() do as a singleton method in objective C?
(6 answers)
Closed 10 years ago.
I meet this code:
#synchronized (self.messageQueue) {
[self.messageQueue insertObject:messageDictionaryRepresentation atIndex:0];
}
I want to ask for help what this syntax(#synchronized) use for?
Thanks.
See Synchronization. You find that is "a convenient way to create mutex locks on the fly in Objective-C code". a related question is What does #synchronized() do?.