macos - QT5.5 'failed to load platform plugin " cocoa ”' - MacOS 10.9

Question

我正在使用 ete3(树可视化)库，它以 PyQT 作为其依赖项之一。当我尝试渲染访问 Qt 库的树 (tree.render) 时，它失败并给出错误:

"This application failed to start because it could not find or load the Qt platform plugin "cocoa".
Available platform plugins are: cocoa, minimal, offscreen.
Reinstalling the application may fix this problem.
Abort trap: 6"

我已经检查了existing discussions还有Qt documentation关于这一点，但是更改 qt.conf 中的插件路径没有帮助。

  Process:         Python [22195]
  Path:            /Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
  Identifier:      Python
  Version:         2.7.6 (2.7.6)
  Code Type:       X86-64 (Native)
  Parent Process:  bash [8443]
  Responsible:     eclipse [8418]
  User ID:         502

  Date/Time:       2016-03-15 16:30:05.179 +1300
  OS Version:      Mac OS X 10.9.5 (13F1603)
  Report Version:  11
  Anonymous UUID:  0BEE0024-9A4E-5B22-7A56-EB2C12CF1FC2


  Crashed Thread:  0  Dispatch queue: com.apple.main-thread

  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000

  Application Specific Information:
  abort() called

  Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
  0   libsystem_kernel.dylib          0x00007fff8f7bf866 __pthread_kill + 10
  1   libsystem_pthread.dylib         0x00007fff89c2a35c pthread_kill + 92
  2   libsystem_c.dylib               0x00007fff92067b2e abort + 125
  3   org.qt-project.QtCore           0x0000000103e60ab9 qt_message_fatal(QtMsgType, QMessageLogContext const&, QString const&) + 9
  4   org.qt-project.QtCore           0x0000000103e62487 QMessageLogger::fatal(char const*, ...) const + 231
  5   org.qt-project.QtGui            0x000000010388d527 QGuiApplicationPrivate::createPlatformIntegration() + 6359
  6   org.qt-project.QtGui            0x000000010388d54b QGuiApplicationPrivate::createEventDispatcher() + 27
  7   org.qt-project.QtCore           0x000000010401d4ec QCoreApplication::init() + 204
  8   org.qt-project.QtCore           0x000000010401d407 QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) + 39
  9   org.qt-project.QtGui            0x000000010388a9ee QGuiApplication::QGuiApplication(QGuiApplicationPrivate&) + 14
  10  org.qt-project.QtWidgets        0x00000001044689ee QApplication::QApplication(int&, char**, int) + 206
  11  QtGui.so                        0x0000000103365a33 init_type_QApplication(_sipSimpleWrapper*, _object*, _object*, _object**, _object**, _object**) + 179
  12  sip.so                          0x0000000105403262 sipSimpleWrapper_init + 197
  13  org.python.python               0x0000000100075f55 type_call + 245
  14  org.python.python               0x000000010000c742 PyObject_Call + 98
  15  org.python.python               0x00000001000c0430 PyEval_EvalFrameEx + 12368
  16  org.python.python               0x00000001000c4786 PyEval_EvalCodeEx + 2118
  17  org.python.python               0x00000001000c2bc0 PyEval_EvalFrameEx + 22496
  18  org.python.python               0x00000001000c4786 PyEval_EvalCodeEx + 2118
  19  org.python.python               0x00000001000c2bc0 PyEval_EvalFrameEx + 22496
  20  org.python.python               0x00000001000c4786 PyEval_EvalCodeEx + 2118
  21  org.python.python               0x00000001000c2bc0 PyEval_EvalFrameEx + 22496
  22  org.python.python               0x00000001000c4786 PyEval_EvalCodeEx + 2118
  23  org.python.python               0x00000001000c48a6 PyEval_EvalCode + 54
  24  org.python.python               0x00000001000e912e PyRun_FileExFlags + 174
  25  org.python.python               0x00000001000e93ca PyRun_SimpleFileExFlags + 458
  26  org.python.python               0x000000010010044d Py_Main + 3101
  27  org.python.python               0x0000000100000f14 0x100000000 + 3860

  Thread 1:: Dispatch queue: com.apple.libdispatch-manager
  0   libsystem_kernel.dylib          0x00007fff8f7c0662 kevent64 + 10
  1   libdispatch.dylib               0x00007fff93213421 _dispatch_mgr_invoke + 239
  2   libdispatch.dylib               0x00007fff93213136 _dispatch_mgr_thread + 52

  Thread 2:
  0   libsystem_kernel.dylib          0x00007fff8f7bfe6a __workq_kernreturn + 10
  1   libsystem_pthread.dylib         0x00007fff89c2af08 _pthread_wqthread + 330
  2   libsystem_pthread.dylib         0x00007fff89c2dfb9 start_wqthread + 13

  Thread 3:
  0   libsystem_kernel.dylib          0x00007fff8f7bfe6a __workq_kernreturn + 10
  1   libsystem_pthread.dylib         0x00007fff89c2af08 _pthread_wqthread + 330
  2   libsystem_pthread.dylib         0x00007fff89c2dfb9 start_wqthread + 13

  Thread 0 crashed with X86 Thread State (64-bit):
    rax: 0x0000000000000000  rbx: 0x00007fff77830310  rcx: 0x00007fff5fbfe578  rdx: 0x0000000000000000
    rdi: 0x0000000000000d07  rsi: 0x0000000000000006  rbp: 0x00007fff5fbfe5a0  rsp: 0x00007fff5fbfe578
     r8: 0x0000000000000040   r9: 0x00007fff5fbfe400  r10: 0x0000000008000000  r11: 0x0000000000000206
    r12: 0x00000001041696b8  r13: 0x0000000106d34b20  r14: 0x0000000000000006  r15: 0x0000000103540510
    rip: 0x00007fff8f7bf866  rfl: 0x0000000000000206  cr2: 0x0000000103edfc50

  Logical CPU:     0
  Error Code:      0x02000148
  Trap Number:     133

我已在/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/中安装了所有库(Qt5.5、PyQt4、SIP4.17、ete3)。这些库都已安装良好，但当外部库尝试查找插件时，它找不到它。

我是 Python 和 Qt 库的新手，因此我们将不胜感激。

Answer 1

问题我已经解决了。这实际上是 Qt 5.5 版本引发的错误。新版本期望在您的应用程序中包含 QtDBus.framework，否则会崩溃。

安issue已经为此提出了。

我安装了以前版本的 Qt (5.4.2)，它运行得非常好。

无论如何，谢谢!