几天前我发布了这个问题,但它非常混乱,我的问题也不是很清楚,所以我删除了它。我一直在挖掘,内存泄漏仍然存在。希望这次尝试会更清楚。
首先我运行了静态分析器,它报告没有内存泄漏。
然后我运行 Instruments,它指出这行代码存在内存泄漏。据我所知,没有内存泄漏。
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;
如果我注释掉上面的代码 Instruments 会在另一个没有明显泄漏的代码块中报告另一个内存泄漏。
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];
仪器还说
负责任的图书馆 = 核心图形
负责框架 = open_handle_to_dylib_path
这是堆栈跟踪。
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
我真的不太确定如何使用这些信息来解决问题,所以任何指导都将不胜感激。也许答案就在跟踪中,但我只是不知道要寻找什么?
编辑::
上面的堆栈跟踪是在模拟器上运行时。以下来自在设备上运行。此跟踪不指向我自己的任何类
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
编辑 2::
我注意到在应用程序生命周期早期报告的泄漏。它指向这个代码块。
这是您制作项目时生成的 x 代码,对吗?
#import <UIKit/UIKit.h>
int main(int argc, char *argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil);
[pool release];
return retVal;
}