Instruments memory leak iphone
- by dubbeat
Hi,
I posted this problem a few days ago but it was very muddled and my question wasnt very clear so I removed it. I've been digging around and the memory leak is still persiting. Hopefully this attempt will be clearer.
First off I've run the static analyzer and it reports no memory leaks.
I then ran Instruments and it pointed to a memory leak at this line of code. As far as I can see there is no memory leak.
featured=[[UILabel alloc]initWithFrame:CGRectMake(130,15, 200, 15)];
//[featured setFont:[UIFont UIFontboldSystemFontOfSize:20]];
featured.font = [UIFont boldSystemFontOfSize:20];
featured.backgroundColor= [UIColor clearColor];
featured.textColor=[UIColor blackColor];
featured.text= @"Featured Promo";
[self.view addSubview:featured];
[featured release];
featured=nil;
If I comment out the above code Instruments reports another memory leak in another block of code where there is no discernible leak.
UIButton *populartbutton = [[UIButton buttonWithType:UIButtonTypeRoundedRect]];
populartbutton.frame = CGRectMake(112, 145, 90, 22); // size and position of button
[populartbutton setTitle:@"Popular" forState:UIControlStateNormal];
populartbutton.backgroundColor = [UIColor clearColor];
populartbutton.adjustsImageWhenHighlighted = YES;
[populartbutton addTarget:self action:@selector(getpopular:)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:populartbutton];
Instruments also says
Responsible Library = Core Graphics
Responsible Frame = open_handle_to_dylib_path
This Is the stack trace.
53 Promo start
52 Promo main /Users/..2/main.m:14
51 UIKit UIApplicationMain
50 UIKit -[UIApplication _run]
49 CoreFoundation CFRunLoopRunInMode
48 CoreFoundation CFRunLoopRunSpecific
47 GraphicsServices PurpleEventCallback
46 UIKit _UIApplicationHandleEvent
45 UIKit -[UIApplication sendEvent:]
44 UIKit -[UIApplication handleEvent:withNewEvent:]
43 UIKit -[UIApplication _reportAppLaunchFinished]
42 QuartzCore CA::Transaction::commit()
41 QuartzCore CA::Context::commit_transaction(CA::Transaction*)
40 QuartzCore CALayerLayoutIfNeeded
39 QuartzCore -[CALayer layoutSublayers]
38 UIKit -[UILayoutContainerView layoutSubviews]
37 UIKit -[UINavigationController _startDeferredTransitionIfNeeded]
36 UIKit -[UINavigationController _startTransition:fromViewController:toViewController:]
35 UIKit -[UINavigationController _layoutViewController:]
34 UIKit -[UINavigationController_computeAndApplyScrollContentInsetDeltaForViewController:]
33 UIKit -[UIViewController contentScrollView]
32 UIKit -[UIViewController view]
31 Promo -[FeaturedLevelViewController viewDidLoad] /Users/..s/FeaturedLevelViewController.m:67 // THIS IS MY CLASS WHERE THE CODE SAMPLES ABOVE ARE FROM
30 UIKit -[UILabel initWithFrame:]
29 UIKit -[UILabel _commonInit]
28 UIKit +[UILabel defaultFont]
27 UIKit +[UIFont systemFontOfSize:]
26 GraphicsServices GSFontCreateWithName
25 CoreGraphics CGFontCreateWithName
24 CoreGraphics CGFontCreateWithFontName
23 CoreGraphics CGFontFinderGetDefault
22 CoreGraphics CGFontGetVTable
21 libSystem.B.dylib pthread_once
20 CoreGraphics load_vtable
19 CoreGraphics load_library
18 CoreGraphics CGLibraryLoadFunction
17 CoreGraphics load_function
16 CoreGraphics open_handle_to_dylib_path
15 libSystem.B.dylib dlopen
14 dyld dlopen
13 dyld dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&)
12 dyld ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&)
11 dyld ImageLoader::recursiveLoadLibraries(ImageLoader::LinkContext const&, bool, ImageLoader::RPathChain const&)
10 dyld dyld::libraryLocator(char const*, bool, char const*, ImageLoader::RPathChain const*)
9 dyld dyld::load(char const*, dyld::LoadContext const&)
8 dyld dyld::loadPhase0(char const*, dyld::LoadContext const&, std::vector<char const*, std::allocator<char const*> >*)
7 dyld dyld::loadPhase1(char const*, dyld::LoadContext const&, std::vector<char const*, std::allocator<char const*> >*)
6 dyld dyld::loadPhase3(char const*, dyld::LoadContext const&, std::vector<char const*, std::allocator<char const*> >*)
5 dyld dyld::loadPhase4(char const*, dyld::LoadContext const&, std::vector<char const*, std::allocator<char const*> >*)
4 dyld dyld::loadPhase5(char const*, dyld::LoadContext const&, std::vector<char const*, std::allocator<char const*> >*)
3 dyld dyld::mkstringf(char const*, ...)
2 dyld strdup
1 dyld malloc
0 libSystem.B.dylib malloc
I'm really not too sure how to use this information to fix the problem so any guidance would be appreciated. Perhaps the answer is in the trace but I just don't know what to look for?
EDIT::
The above stack trace is when running on the simulator. The following is from running on a device. This trace does not point to any of my own classes
23 Promo 0x0
22 libSystem.B.dylib _pthread_body
21 Foundation __NSThread__main__
20 Foundation +[NSThread exit]
19 libSystem.B.dylib _pthread_exit
18 libSystem.B.dylib _pthread_tsd_cleanup
17 QuartzCore CA::Transaction::release_thread(void*)
16 QuartzCore CA::Transaction::commit()
15 QuartzCore CA::Context::commit_transaction(CA::Transaction*)
14 QuartzCore CALayerDisplayIfNeeded
13 QuartzCore -[CALayer display]
12 QuartzCore -[CALayer _display]
11 QuartzCore CABackingStoreUpdate
10 QuartzCore backing_callback(CGContext*, void*)
9 QuartzCore -[CALayer drawInContext:]
8 UIKit -[UIView(CALayerDelegate) drawLayer:inContext:]
7 UIKit -[UILabel drawRect:]
6 UIKit -[UILabel drawTextInRect:]
5 UIKit -[UILabel _drawTextInRect:baselineCalculationOnly:]
4 UIKit -[NSString(UIStringDrawing) drawAtPoint:forWidth:withFont:lineBreakMode:]
3 UIKit -[NSString(UIStringDrawing) drawAtPoint:forWidth:withFont:lineBreakMode:letterSpacing:includeEmoji:]
2 WebCore WKSetCurrentGraphicsContext
1 WebCore CurrentThreadContext()
0 libSystem.B.dylib calloc
