CorePlot 无声崩溃（可能来自scaleToFitPlots:）

Question

我有一个带有 CorePlot 图表的 iPhone 应用程序。我在图表旁边放置了一个按钮，按下时会在图表上调用 scaleToFitPlots: 。

问题是有时我的应用程序在调用scaleToFitPlots: 时崩溃。

大多数时候没有控制台消息，通常没有调试器消息，但很少有以下重复大约十次

warning: Unable to restore previously selected frame.

通常没有崩溃线程的堆栈跟踪，但有时它是

0 <????>

或

0 -[CPGradient newAxialGradientInRect:]
1 <????>

崩溃报告之一：

Incident Identifier: 4F9B520F-14A9-460F-A47D-93662C41D80A
CrashReporter Key:   d83f6beafd9d721fc55a6cda5eb9b2926b753649
Hardware Model:      iPad2,1
Process:         IQ [297]
Path:            /var/mobile/Applications/18468A8B-79C8-42FA-A597-141CC91E54F2/IQ.app/IQ
Identifier:      IQ
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2011-07-20 15:53:48.420 -0700
OS Version:      iPhone OS 4.3.3 (8J2)
Report Version:  104

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x002fc080
Crashed Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   ???                             0x002fc080 0 + 3129472
1   ???                             0xfffffff8 0 + -8

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x35590fbc kevent + 24
1   libdispatch.dylib               0x3525bed4 _dispatch_mgr_invoke + 744
2   libdispatch.dylib               0x3525cf3a _dispatch_queue_invoke + 70
3   libdispatch.dylib               0x3525c4ec _dispatch_worker_thread2 + 228
4   libsystem_c.dylib               0x3566758a _pthread_wqthread + 258
5   libsystem_c.dylib               0x35667bbc start_wqthread + 0

Thread 2 name:  WebThread
Thread 2:
0   libsystem_kernel.dylib          0x3558dc00 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x3558d758 mach_msg + 44
2   CoreFoundation                  0x309582b8 __CFRunLoopServiceMachPort + 88
3   CoreFoundation                  0x3095a562 __CFRunLoopRun + 350
4   CoreFoundation                  0x308eaebc CFRunLoopRunSpecific + 224
5   CoreFoundation                  0x308eadc4 CFRunLoopRunInMode + 52
6   WebCore                         0x35f5327e RunWebThread(void*) + 382
7   libsystem_c.dylib               0x3566630a _pthread_start + 242
8   libsystem_c.dylib               0x35667bb4 thread_start + 0

Thread 3:
0   libsystem_kernel.dylib          0x355903ec __workq_kernreturn + 8
1   libsystem_c.dylib               0x356676d8 _pthread_wqthread + 592
2   libsystem_c.dylib               0x35667bbc start_wqthread + 0

Thread 0 crashed with ARM Thread State:
    r0: 0x00000001    r1: 0x0000000f      r2: 0x2fdfdae0      r3: 0x0000002f
    r4: 0x0650d740    r5: 0x2fdfdb30      r6: 0x005e7460      r7: 0x00c8a0d2
    r8: 0xd7400000    r9: 0x2fdfdaf4     r10: 0x7c852fdf     r11: 0xdb400004
    ip: 0x00000000    sp: 0x2fdfdb10      lr: 0x33325e15      pc: 0x002fc080
  cpsr: 0x600f0010

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0x35aa4000 - 0x35af2fff  CoreMotion armv7  <58c353bb7e33361f881da07c72f4cdfb> /System/Library/Frameworks/CoreMotion.framework/CoreMotion
0x35af3000 - 0x35af4fff  libsystem_network.dylib armv7  <39bf0f48bd8539169a77f8f61cdcd4c9> /usr/lib/system/libsystem_network.dylib
0x35af5000 - 0x35af7fff  libAccessibility.dylib armv7  <d55f1553d14831a2a5435ae27ef75ef4> /usr/lib/libAccessibility.dylib
0x35af8000 - 0x35afbfff  IOSurface armv7  <ad50e71624583d06b891344d832f9b08> /System/Library/PrivateFrameworks/IOSurface.framework/IOSurface
0x35afc000 - 0x35b2ffff  iCalendar armv7  <34ce1957082f3518b5740ac33cfc92eb> /System/Library/PrivateFrameworks/iCalendar.framework/iCalendar
0x35b30000 - 0x35b30fff  Accelerate armv7  <7d5ad465049136afaa1f0d89aac600bc> /System/Library/Frameworks/Accelerate.framework/Accelerate
0x35d32000 - 0x35df1fff  CFNetwork armv7  <b09e0d53de9f3bc8bde494780f3cdd4f> /System/Library/Frameworks/CFNetwork.framework/CFNetwork
0x35fd4000 - 0x36003fff  SystemConfiguration armv7  <1d73b8a159363f96bb9c039655c5eae6> /System/Library/Frameworks/SystemConfiguration.framework/SystemConfiguration
0x36004000 - 0x36024fff  AppleAccount armv7  <4e0ac5cf93b338ab8c5f34ba3c5e2ee4> /System/Library/PrivateFrameworks/AppleAccount.framework/AppleAccount
0x36025000 - 0x3602bfff  ProtocolBuffer armv7  <f9277ee9b85b3722975ad319a323aca0> /System/Library/PrivateFrameworks/ProtocolBuffer.framework/ProtocolBuffer
0x3602c000 - 0x36637fff  WebCore armv7  <07941e59d0a33f94802c16c76238fddf> /System/Library/PrivateFrameworks/WebCore.framework/WebCore
0x36644000 - 0x36650fff  AXRuntime armv7  <6698f47f8d1732579ebd62fff9c35035> /System/Library/PrivateFrameworks/AXRuntime.framework/AXRuntime
0x36970000 - 0x36983fff  libmis.dylib armv7  <529ea6e3a87230ce9f6cf3285c22429c> /usr/lib/libmis.dylib
0x36994000 - 0x36a79fff  CoreFoundation armv7  <a8444f997111304c9571b3ff974b769c> /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
0x36a91000 - 0x36b37fff  Celestial armv7  <7fbd02fa664b33babaf0327c320d1491> /System/Library/PrivateFrameworks/Celestial.framework/Celestial
0x36bbb000 - 0x36bcdfff  VoiceServices armv7  <d219dd8a59c93390b3461a015e28b29c> /System/Library/PrivateFrameworks/VoiceServices.framework/VoiceServices
0x36bfe000 - 0x36c04fff  IAP armv7  <c0f4c99a1b493e489948f231ad9238e2> /System/Library/PrivateFrameworks/IAP.framework/IAP
0x36c29000 - 0x36c36fff  libbsm.0.dylib armv7  <0a1e2bb78d5138419ecad8ba0fe42fdd> /usr/lib/libbsm.0.dylib
0x36cd3000 - 0x36df4fff  CoreGraphics armv7  <65f6c8701b563542820a26b0dfc4f6a4> /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics

我尝试过的一件事是使用调试器暂停除主线程之外的所有线程。这可以防止系统启动另一个线程之前发生崩溃。

注意：

• 我的程序不运行任何可能导致此问题的后台线程。
• 在捏合图表进行缩放后立即拟合绘图会导致大约三分之一的时间崩溃，而当应用程序空闲一段时间后拟合绘图很少会导致崩溃。
• 它不会在模拟器上崩溃。仅设备。

这是 CorePlot 的已知错误吗？任何帮助将不胜感激。

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编辑：我的应用程序在调用scaleToFitPlots之前立即将绘图空间的全局x和y范围设置为nil：（这样就可以适合当前全局范围之外的绘图）。当我删除它时，应用程序不再崩溃。

这是 CorePlot 的错误吗？我该如何解决这个问题？ （我仍然需要限制用户使用捏合手势缩放）

Answer 1

升级到核心图0.4。

升级到 0.4 后，我不再遇到此崩溃问题。 http://code.google.com/p/core-plot/downloads/list?can=2&q=&sort=-uploaded&colspec=Filename%20Summary%20Uploaded%20ReleaseDate%20Size %20下载计数