According to stack-over flow guidance I did my memory management things. SO I discovered memory leaks. thanks for all about it. Now how could I find memory allocation that I didn't release ?
Is their any easy way to do it on instrument on Xcode. I attached my memory leaks image below.
SO is their any easy way to catch that 3 leaks [mention on resulted image] from is tool ?
Thanks advanced.
Click on the leaks row inside of the time line (where the red bars
are) click on them, dont double click them.
This will display in Object Summary which items where leaked.
Next display the far right panel, (see the button that isn't clicked
in view)
Single click an item in the Object Summary it will display a stack
trace on the item that was leaked.
Look through the the stack trace double click on the highest item from your project
This will open and highlight where the leak has occurred
Related
I'm facing some serious memory-related problems in maintenance project and unable to identify the cause for the issue I'm facing. Please find the attached below image for reference.
Help would be much appreciated.
The Cycles and Roots screenshot you showed doesn't provide any information on what's causing the leak. If you want to find the leaks in your code, switch to the call tree view using the jump bar. Click the Call Tree button at the bottom of the window and select Invert Call Tree and Hide System Libraries checkboxes to make it easier to find your code in the call tree view.
I'm checking my app with Leaks and find some memory leaks indeed.
But In the "Extended Detail" panel, I can't locate the source code directly.
There are only memory address where the leaks happens.
Here is the snapshot:
And here is the snapshot from others:
I have been looking for infomation by google, but no result.
Who can help me?
Thanks.
When you double click the red thick line of memory leak as shown above , in the lower portion of the Instrument you will be able to see all the leaks and related info. If u want to find detailed info about a particular leak just click the arrow which comes up in its address field.
This will refresh the window and tell you the details with Responsible Caller column in the end of the table , it gives the specific method name where the leaks has occurred. If you double click the row, it will open that corresponding .m file where that method has been implemented.
This link will be helpful for you.
http://soulwithmobiletechnology.blogspot.in/2011/04/how-to-check-memory-leaks-in-xcode-4.html
Can any one guide me that how to use and identify the variables that are leaking the memory?
I took the snap as following, but yet no idea to understand it
Open the right utility area (click third button next to the status info in the top bar).
when you then klick on a leaked block (and on the arrow next to the address), you can see the code blocks responsible for the steps
I am loading the custom cell on tableView and i return 50 rows in the tableView.
number of some rows are display in the tableview but when scroll the tableview my customcell is not display and I have the error
"EXC_BAD_ACCESS"
and also display following message on the console
"void SendDelegateMessage(NSInvocation*): delegate (webViewDidLayout:) failed to return after waiting 10 seconds. main run loop mode: UITrackingRunLoopMode"
I think you get this error due to your method of making custom cells. When you made the class file for the custom cell in the .m file you released the IBOutlets. Try removing that portion from your code than try.
I had the same problem in an app, and I solved that problem this way. Maybe this solution will work for you too.
The best way to detect zombies is:
in the Groups and Files section,
expand the Executables section
and right click on your app name and
choose Get Info
select the Arguments tab on the top and then add a new entry in the Variables to be set in the environment section. Name the new variable to NSZombieEnabled and set its value to YES.
After this you will have information in console on which released objects you make calls.
This typically means that you have asked the program to look at a memory area that you don't have access to, which usually means you have run off the end of an array, or something.
If you are running in debug mode, the stack trace will probably give you more clues. Open up the debug console.
You should also use NSZombieEnabled, it usually helps. It shows you which deallocated object was accessed. Be sure to disable it after you use it because using this, no memory is ever released.
I have an iphone app with a modal view. The app crashes when the modal view get dismissed.
As soon as the modal disappear at the bottom of the screen, and consequently the original view is shown behind, then the app crashes with no entry in console view.
I have tried to switch debugger on and I discovered that the app just run fine, with no crashes at all.
-First, I would like to know why such behaviour, shouldn't the debugger sit just on top without "disturbing" the app ?
-Second, without debugger, can you point out what should I look at to solve my problem ? Or if you encounter something similiar ? Please be as much specific you can, because I am not an expert in objective-c programming.
I don't know what details to give you, the app is a normal one with standard iphone component, but for start I can say the modal view (which is built with IB) is called inside a NavigationBar system.
thanks
When these types of things happen, it is almost always because of memory allocation issues. The first step I would take is to do a "Clean All" and a "Build and Analyze", and look at all the analysis warnings. Analyze is very good at finding basic "use before allocate", "use after deallocate", or "wrong number of retains/releases" types of problems.
The next step is to turn on "Zombie" detection mode, which looks for accesses on memory that has already been deleted (in other words, killed objects coming back from the dead.) To do this, get info on your executable, go to the Arguments tab, and add a "variable to be set in the environment" of "NSZombieEnabled" to value "YES". Then look in the console when you run to see if something looks off.
Finally, you might try creating a new configuration where you use all the release mode settings for optimization, but add debug symbols. Maybe that will shake up the allocation disbursement in memory enough to trigger the bug in debug mode.