Impossibile eseguire il debug del plug-in Quicklook in Xcode

Question

Sto scrivendo un plug-in di Quicklook per visualizzare in anteprima i pacchetti di app. Quando provo a eseguire il debug in Xcode 6.1 (su Yosemite), non riesco a farlo funzionare. lanci e 'Quicklookd' rimane aperto sul banco degli imputati, ma non rende alcun anteprima e ottengo questo output nella console:

Testing Quick Look preview with files: 
    /Applications/Font Book.app 
[DEBUG] Preview test for file:///Applications/Font%20Book.app/. Content type UTI: com.apple.application-bundle 
[DEBUG] Previewing file:///Applications/Font%20Book.app. Content type UTI: com.apple.application-bundle. Generator used: <QLGenerator /Users/imac/Library/QuickLook/TestPlugin.qlgenerator> 
[DEBUG] Loading <QLGenerator /Users/imac/Library/QuickLook/TestPlugin.qlgenerator> 
[DEBUG] Previewing file:///Applications/Font%20Book.app finished 
2015-02-04 10:59:35.188 qlmanage[1664:138646] *** CFMessagePort: bootstrap_register(): failed 1100 (0x44c) 'Permission denied', port = 0x9103, name = 'com.apple.CFPasteboardClient' 
See /usr/include/servers/bootstrap_defs.h for the error codes. 
2015-02-04 10:59:35.188 qlmanage[1664:138646] Failed to allocate communication port for com.apple.CFPasteboardClient; this is likely due to sandbox restrictions 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: conn 0x23823 token 0x1ffffffffffe85 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: Backtrace (at 6350.6): 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 0 CoreGraphics      0x00007fff894a9588 CGSBacktraceCreate + 112 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 1 CoreGraphics      0x00007fff894c7940 _ZN16CGSUpdateManager14disable_updateEv + 86 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 2 AppKit        0x00007fff90f0aa25 -[NSWindow disableScreenUpdatesUntilFlush] + 127 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 3 AppKit        0x00007fff91442e75 -[NSVisualEffectView _createOrUpdateBackdrop:view:vibrancyEffect:] + 823 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 4 AppKit        0x00007fff91443b92 -[NSVisualEffectView _updateCGSWindowBackdrop] + 70 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 5 AppKit        0x00007fff91447874 -[NSVisualEffectView _update] + 147 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 6 AppKit        0x00007fff914475a1 -[NSVisualEffectView layout] + 59 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 7 AppKit        0x00007fff90eeca64 -[NSView _layoutSubtreeWithOldSize:] + 373 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 8 AppKit        0x00007fff90eeccb5 -[NSView _layoutSubtreeWithOldSize:] + 966 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 9 AppKit        0x00007fff90ee04a0 -[NSView layoutSubtreeIfNeeded] + 885 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 10 AppKit        0x00007fff9155ff0a _NSViewLayoutSubtreesThatUseAutolayoutIfNeeded + 71 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 11 AppKit        0x00007fff90f4181f -[NSWindow(NSConstraintBasedLayout) _layoutViewTree] + 82 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 12 AppKit        0x00007fff90f711b9 -[NSWindow(NSConstraintBasedLayout) layoutIfNeeded] + 244 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 13 AppKit        0x00007fff90fad1de _handleWindowNeedsDisplayOrLayoutOrUpdateConstraints + 612 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 14 AppKit        0x00007fff915760e1 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraintsUnlessPostingDisabled]_block_invoke1531 + 46 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 15 CoreFoundation      0x00007fff8b97bda7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 16 CoreFoundation      0x00007fff8b97bd00 __CFRunLoopDoObservers + 368 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 17 CoreFoundation      0x00007fff8b96de08 __CFRunLoopRun + 872 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 18 CoreFoundation      0x00007fff8b96d858 CFRunLoopRunSpecific + 296 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 19 QuickLookUI       0x00007fff93acb8d2 -[QLPreviewView _startTimeOut] + 189 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 20 QuickLookUI       0x00007fff93aae35e -[QLPreviewPanelController _setCurrentPreviewItem:withTransition:blocking:] + 289 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 21 QuickLookUI       0x00007fff93aada93 -[QLPreviewPanelController _refreshLayoutAndContentBlocking:] + 250 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 22 QuickLookUI       0x00007fff93aaf139 -[QLPreviewPanelController willOpen] + 734 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 23 QuickLookUI       0x00007fff93aa5d04 -[QLPreviewPanel _openWithEffect:willOpen:toFullscreen:] + 897 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 24 qlmanage       0x0000000107b11e46 qlmanage + 155206 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 25 qlmanage       0x0000000107af14af qlmanage + 21679 
Feb 4 10:59:50 iMac.local qlmanage[1664] <Warning>: void CGSUpdateManager::log() const: 26 libdyld.dylib      0x00007fff875985c9 start + 1 

Tuttavia, se provo tramite Finder (premendo la barra spaziatrice) funziona benissimo visualizzazione dell'anteprima. Il problema è che non posso eseguire il debug e non ottenere alcun registro. Sto usando QLPreviewRequestSetDataRepresentation con UTI di tipo 'kUTTypeHTML'.

Come posso risolvere questo? Funzionava bene con le vecchie versioni di Xcode e OS X. Ho bisogno di essere in grado di eseguire il debug del mio plugin da Xcode. Grazie.

Answer 1

Penso che sia abbastanza chiaro che si tratta di un bug in qlmanage (che è ancora presente in 10.10.3 beta) - non mostra correttamente l'output HTML.

È possibile utilizzare due soluzioni:

1. Utilizzare il qlmanage -t (o -t -s someBiggerNumber), se il codice per le miniature che generano utilizza QLThumbnailRequestSetThumbnailWithDataRepresentation ed è sostanzialmente simile a quello per le anteprime.

2. Utilizzare qlmanage -o dir per generare HTML generato in un file che è possibile esaminare con Quicklook dal Finder.