iOS 低内存崩溃,但内存使用率非常低

发布于 2024-11-07 11:57:44 字数 1700 浏览 0 评论 0 原文

这已经困扰我很长时间了。我的应用程序运行占用大约 2.74MB 内存。没关系。但当它创建一个 UIWebView 时,它会增加到大约 5.87MB 并继续崩溃。这些是在我的第一代 iPad 上运行时仪器中的实时字节下给出的值。

我找不到崩溃日志。以下来自控制台:

MyApp[1205] <Warning>: Received memory warning. Level=1
MyApp[1205] <Warning>: applicationDidReceiveMemoryWarning
SpringBoard[30] <Warning>: Received memory warning. Level=1
MobileMail[1199] <Warning>: Received memory warning. Level=1
configd[26] <Notice>: jetsam: kernel memory event (95), free: 428, active: 1853, inactive: 1011, purgeable: 338, wired: 15122
configd[26] <Notice>: jetsam: kernel termination snapshot being created
com.apple.launchd[1] <Notice>: (UIKitApplication:com.apple.mobilemail[0x8966]) Exited: Killed: 9
com.apple.launchd[1] <Notice>: (UIKitApplication:com.MyApp.MyApp[0xdd4f]) Exited: Killed: 9
SpringBoard[30] <Warning>: Application 'Mail' exited abnormally with signal 9: Killed: 9
kernel[0] <Debug>: launchd[1207] Builtin profile: MobileMail (sandbox)
SpringBoard[30] <Warning>: Application 'MyApp' exited abnormally with signal 9: Killed: 9
configd[26] <Debug>: CaptiveNetworkSupport:UIAllowedNotifyCallback:70 uiallowed: false
ReportCrash[1206] <Error>: libMobileGestalt loadBasebandMobileEquipmentInfo: CommCenter error: 1:45
ReportCrash[1206] <Error>: libMobileGestalt copyInternationalMobileEquipmentIdentity: Could not get mobile equipment info dictionary
ReportCrash[1206] <Error>: Saved crashreport to /Library/Logs/CrashReporter/LowMemory-2011-05-12-160645.plist using uid: 0 gid: 0, synthetic_euid: 0 egid: 0

我已经删除了对 imageNamed 的所有调用,将自动释放的内容更改为分配/释放。但我不明白为什么会发生这种情况,这让我发疯。

感谢您的帮助!

This has been annoying me for a long time. My app runs taking up about 2.74MB of memory. That's fine. But then when it creates a UIWebView it goes up to around 5.87MB and proceeds to crash. Those are the values given under Live Bytes in Instruments while running on my 1st gen iPad.

There is no crash log that I can find. The following is from the console:

MyApp[1205] <Warning>: Received memory warning. Level=1
MyApp[1205] <Warning>: applicationDidReceiveMemoryWarning
SpringBoard[30] <Warning>: Received memory warning. Level=1
MobileMail[1199] <Warning>: Received memory warning. Level=1
configd[26] <Notice>: jetsam: kernel memory event (95), free: 428, active: 1853, inactive: 1011, purgeable: 338, wired: 15122
configd[26] <Notice>: jetsam: kernel termination snapshot being created
com.apple.launchd[1] <Notice>: (UIKitApplication:com.apple.mobilemail[0x8966]) Exited: Killed: 9
com.apple.launchd[1] <Notice>: (UIKitApplication:com.MyApp.MyApp[0xdd4f]) Exited: Killed: 9
SpringBoard[30] <Warning>: Application 'Mail' exited abnormally with signal 9: Killed: 9
kernel[0] <Debug>: launchd[1207] Builtin profile: MobileMail (sandbox)
SpringBoard[30] <Warning>: Application 'MyApp' exited abnormally with signal 9: Killed: 9
configd[26] <Debug>: CaptiveNetworkSupport:UIAllowedNotifyCallback:70 uiallowed: false
ReportCrash[1206] <Error>: libMobileGestalt loadBasebandMobileEquipmentInfo: CommCenter error: 1:45
ReportCrash[1206] <Error>: libMobileGestalt copyInternationalMobileEquipmentIdentity: Could not get mobile equipment info dictionary
ReportCrash[1206] <Error>: Saved crashreport to /Library/Logs/CrashReporter/LowMemory-2011-05-12-160645.plist using uid: 0 gid: 0, synthetic_euid: 0 egid: 0

I have removed all calls to imageNamed, changed autoreleased stuff to alloc/release. But I cannot work out why this is happening and it's driving me insane.

Thanks for any help!

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锦爱 2024-11-14 11:57:44

几乎可以肯定,您使用的内存比您想象的要多得多。

要了解应用程序真正使用的内容,您必须做什么并不明显,但是一旦您执行几次,您就会记住。

  1. 使用分配性能工具运行。
  2. 单击“分配”下的 VM Tracker“行”(在屏幕截图中)
  3. 单击“自动快照”

然后您将看到脏内存(在我的屏幕截图中当前为 20.34MB)。

这应该可以让您更好地了解应用程序退出的原因。您可能发生了一些大的泄漏。

祝你好运!

此屏幕截图会有帮助

You are almost certainly using a lot more memory than you think.

It's not obvious what you have to do to see what your app is really using, but once you do it a couple times, you'll remember.

  1. Run with the Allocations performance tool.
  2. Click the VM Tracker "row" under "Allocations" (in the screenshot)
  3. Click "Snapshot Automatically"

Then you will see your Dirty memory (currently 20.34MB in my screenshot).

This should give you a much better picture of why your app is getting quit. You probably hav some large leaking happening.

good luck!

This screenshot will help

抽个烟儿 2024-11-14 11:57:44

我有两件事需要补充,可能会有所帮助:

  1. 正如之前的答案 ,UIImage 的位图不考虑内存量,泄漏会告诉您您的应用程序正在使用!所以你可能有很多 UIImages 使用了大量的内存,但没有显示在总数中。我的建议是使用 Allocations 来检查应用程序运行时创建和销毁的 UIImage 对象的数量。

查看操作系统分配给您的应用程序的内存量。这是您应用程序正在使用的内存的更准确数字。 (您需要#import“mach/mach.h”)

干杯!

I have two things to add that may help:

  1. As mentioned in a previous answer , the bitmat of a UIImage is not considered in amount of memory Leaks tells you your app is using! so you may have a lot of UIImages that are using a lot of memory buy not showing in the total. My recommendation is to use Allocations to check out the number of UIImage objects created and destroyed while your app runs.
  2. As mentioned in this answer use the following code

    -(void) report_memory {
        struct task_basic_info info;
        mach_msg_type_number_t size = sizeof(info);
        kern_return_t kerr = task_info(mach_task_self(),
                                       TASK_BASIC_INFO,
                                       (task_info_t)&info,
                                       &size);
        if( kerr == KERN_SUCCESS ) {
            NSLog(@"Memory in use (in bytes): %u", info.resident_size);
        } else {
            NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
        }
    }
    

to see the amount of memory the operating system has assigned your app. That is more accurate number on the memory you app is using. (You will need to #import "mach/mach.h")

cheers!

本宫微胖 2024-11-14 11:57:44

您快速按该菜单按钮 2 次,您将看到该应用程序,单击所有应用程序的 x,然后打开您需要的应​​用程序。

You press that menu button 2 times fast you will see the app click the x for all the apps then open the ones you need.

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