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Getting a Packet Trace
(HTML)
( )
QA1176: Lists tools available for looking at the network packets on the wire.
|
Internet & Web, Networking |
Technical Q&As |
2008-06-03
|
|
QTKit Capture - Disabling Audio Or Video When Capturing From a Muxed Device
(HTML)
QA1607: Describes the use of the setEnabled: method to disable audio or video capture from muxed devices.
|
QuickTime |
Technical Q&As |
2008-05-19
|
|
Determining console user login status
(HTML)
QA1133: How to determine whether a user is logged in on the console, and be notified of changes.
|
Process Management |
Technical Q&As |
2008-04-14
|
|
Bonjour Printer Subtype for HTTP
(HTML)
QA1555: Describes how printer vendors can register their bonjour service such that Safari can see them.
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Networking |
Technical Q&As |
2008-03-25
|
|
Drawing attributed strings that are both filled and stroked
(HTML)
QA1531: Describes how the value of NSStrokeWidthAttributeName indicates fill, stroke, or both, in attributed strings.
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Text & Fonts |
Technical Q&As |
2008-03-25
|
|
QTKit Capture - Extracting SMPTE Timecode information from a QTSampleBuffer
(HTML)
QA1600: Describes how to use the QTSampleBufferSMPTETimeAttribute with a sample buffer.
|
QuickTime |
Technical Q&As |
2008-03-17
|
|
Suppressing the "unexpectedly quit" alert
(HTML)
QA1288: Describes how to suppress the "unexpectedly quit" alert.
|
User Experience |
Technical Q&As |
2008-03-11
|
|
Common mistakes with delegation in Cocoa
(HTML)
QA1554: The two most common errors that lead to a delegate method not being received.
|
Design Guidelines, Objective-C Language |
Technical Q&As |
2008-02-27
|
|
Disabling text completion in an NSTextField
(HTML)
QA1553: Shows how to implement a delegate method provided by NSControl to disable automatic text completion.
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Text & Fonts, User Experience |
Technical Q&As |
2008-02-27
|
|
NSDate - Natural language date parsing in early Leopard releases
(HTML)
QA1581: Acknowledges a regression in +dateWithNaturalLanguageString: behavior of NSDate which is fixed as of 10.5.2.
|
User Experience |
Technical Q&As |
2008-02-27
|
|
Customizing Process Stack Size
(HTML)
QA1419: Describes methods for setting the stack size of a process and/or thread.
|
Process Management, Resource Management |
Technical Q&As |
2008-02-20
|
|
Re-enabling dragging from NSTableView to other applications
(HTML)
()
QA1220: Explains how to re-enable drag-and-drop from NSTableViews to other applications
|
Interapplication Communication, User Experience |
Technical Q&As |
2008-02-08
|
|
Connecting the Font Menu in Interface Builder 3
(HTML)
QA1571: How to connect and configure the Font/Format menus in Interface Builder 3.
|
Design Guidelines, Text & Fonts, Tools, User Experience |
Technical Q&As |
2008-01-21
|
|
Enabling the application menu's "Preferences" menu item on Mac OS X
(HTML)
QA1552: Describes the two things you need to implement to enable the "Preferences" menu item on Mac OS X.
|
User Experience |
Technical Q&As |
2008-01-21
|
|
How do I get the hexadecimal value of an NSColor object?
(HTML)
QA1576: Describes how to convert an NSColor object to its Hexadecimal value.
|
Graphics & Imaging, Objective-C Language |
Technical Q&As |
2007-12-19
|
|
Obtaining the localized application name in Cocoa
(HTML)
QA1544: Describes how to obtain several versions of the application name in Cocoa.
|
Internationalization, Resource Management |
Technical Q&As |
2007-09-21
|
|
Adding and removing a submenu from a menu in Cocoa
(HTML)
QA1420: Explains how to dynamically add and remove menus in a Cocoa application.
|
User Experience |
Technical Q&As |
2007-09-10
|
|
Don't forget to cancel your Bonjour resolve
(HTML)
QA1297: Explains why it's important to cancel a Bonjour resolve operation.
|
Networking |
Technical Q&As |
2007-08-30
|
|
How to measure CG text
(HTML)
QA1051: Explains how to measure Core Graphics text.
|
Graphics & Imaging, Printing |
Technical Q&As |
2007-08-02
|
|
CGBitmapContextCreate Supported Color Spaces
(HTML)
QA1037: Lists the color space and alpha info combinations currently supported by CGBitmapContextCreate.
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Games, Graphics & Imaging |
Technical Q&As |
2007-07-18
|
|
Debugging a WebKit Plug-in in Xcode
(HTML)
QA1500: Directions for debugging a WebKit plug-in in Xcode.
|
Internet & Web |
Technical Q&As |
2007-06-05
|
|
Detecting the Caps Lock Key
(HTML)
QA1519: Explains how to detect when the caps lock key is turned on and off.
|
Events & Other Input |
Technical Q&As |
2007-05-11
|
|
Using UTIs to Identify Image Files
(HTML)
QA1518: Explains how to use Uniform Type Identifiers to identify what files can be opened at images.
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File Management, Graphics & Imaging |
Technical Q&As |
2007-05-11
|
|
Including a custom NSWindow in a nib file
(HTML)
QA1511: Shows how to create a custom NSWindow and instantiate it in a nib file.
|
Tools |
Technical Q&As |
2007-03-21
|
|
Availability of Quartz Composer Patches in Web Kit
(HTML)
QA1505: Details which Quartz Composer patches are available in Web Kit
|
Internet & Web |
Technical Q&As |
2007-03-05
|
|
NSOpenPanel - Choosing any file and ignoring packages
(HTML)
QA1468: Explains how to configure NSOpenPanel to filter only files and ignoring packages.
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File Management, User Experience |
Technical Q&As |
2007-01-25
|
|
Preventing column reordering in NSTableView
(HTML)
QA1503: Demonstrates how to prevent column reordering of certain columns in NSTableView.
|
User Experience |
Technical Q&As |
2007-01-24
|
|
How can I determine the order of the languages set by the user in the Language tab of the International preference pane?
(HTML)
QA1391: Retrieving the order of the languages set by the International preference pane in Cocoa, Carbon, and Terminal.
|
Internationalization |
Technical Q&As |
2006-12-19
|
|
Configuring the Recent Searches menu for NSSearchField
(HTML)
QA1496: Discusses the common problem when adding menu items to the Recent Searches menu.
|
User Experience |
Technical Q&As |
2006-11-27
|
|
Security Framework Error Codes
(HTML)
QA1499: Explains how to interpret errors returned by the Security Framework with an overview of Security error handling.
|
Security |
Technical Q&As |
2006-11-16
|
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NSProgressIndicator animation and redraw
(HTML)
QA1473: Discusses why NSProgressIndicator does not redraw during progress loops.
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User Experience |
Technical Q&As |
2006-11-15
|
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Debugging NSTableView's "Action Invocation" binding
(HTML)
QA1472: Discusses the issues and factors that affect NSTableView's "Action Invocation" binding.
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User Experience |
Technical Q&As |
2006-11-13
|
|
Finding EXC_BAD_ACCESS bugs in a Cocoa project
(HTML)
QA1367: Discusses how to find memory protection violations or EXC_BAD_ACCESS bugs in Cocoa projects.
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Resource Management |
Technical Q&As |
2006-10-10
|
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What is the "main bundle" of a command-line foundation tool?
(HTML)
QA1436: Reveals the location of the main bundle of a command-line foundation tool.
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Runtime Architecture |
Technical Q&As |
2006-10-10
|
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How to make NSTextField accept tab, return and enter keys.
(HTML)
QA1454: Describes how to make the NSTextField control accept tab, return and enter keys by using the control's dispatch delegate method.
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Text & Fonts, User Experience |
Technical Q&As |
2006-10-09
|
|
Building Objective-C static libraries with categories
(HTML)
QA1490: Describes how to properly build Objective-C static libraries that contain categories on existing classes.
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Objective-C Language |
Technical Q&As |
2006-10-03
|
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Programmatically Accessing and Manipulating Multiple Keychain Items
(HTML)
QA1486: An explanation on what is and is not possible using the SecKeychain API to manipulate Keychain Items.
|
Security |
Technical Q&As |
2006-10-03
|
|
Embedding Hyperlinks in NSTextField and NSTextView
(HTML)
QA1487: Shows how a Cocoa app can embed a hyperlink inside both NSTextField and NSTextView using NSAttributedString.
|
Text & Fonts, User Experience |
Technical Q&As |
2006-10-02
|
|
Disabling and Enabling an NSTextView
(HTML)
QA1461: Shows how a Cocoa application can disable and enable an NSTextView.
|
Text & Fonts, User Experience |
Technical Q&As |
2006-09-11
|
|
How to create a Cocoa Disclosure Button Control
(HTML)
QA1485: Explains how to create a disclosure button control in Cocoa, not immediately available in Interface Builder.
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User Experience |
Technical Q&As |
2006-08-01
|
|
CoreAudio Overload Warnings
(HTML)
QA1467: Describes CoreAudio overload warnings what they mean and how to avoid them.
|
Audio |
Technical Q&As |
2006-03-29
|
|
MovieAudioExtraction - Ensure a Movie is fully loaded before starting an extraction session
(HTML)
QA1469: Describes the importance of making sure a Movie is fully loaded before extracting audio.
|
QuickTime |
Technical Q&As |
2006-03-29
|
|
Using NSSound with CoreAudio on Mac OS 10.3.x
(HTML)
QA1394: Workaround the NULL input buffers in a Core Audio IOProc callback when using NSSound by using AudioDeviceAddIOProc
|
Audio |
Technical Q&As |
2006-03-29
|
|
Debugging Graphics with QuartzDebug
(HTML)
()
QA1236: Explains how to use QuartzDebug to debug graphics issues.
|
Graphics & Imaging |
Technical Q&As |
2006-01-12
|
|
Problems getting Bonjour TXT record information
(HTML)
QA1389: Explains why you might have problems retrieving TXT record information from a CFNetServiceRef or NSNetService.
|
Networking |
Technical Q&As |
2005-07-06
|
|
Weak Linking To Spotlight
(HTML)
QA1422: Describes a problem with weak linking to Spotlight (the Metadata framework), and its solution.
|
File Management |
Technical Q&As |
2005-06-03
|
|
How can I optimize a Quartz Composer composition depending on the hardware it runs on?
(HTML)
QA1433: Explains how to design compositions that adapt to the hardware limitations.
|
Graphics & Imaging |
Technical Q&As |
2005-06-01
|
|
Crash in ABAddPropertiesAndTypes
(HTML)
QA1404: How to correctly add custom Address Book properties using ABAddPropertiesAndTypes
|
Apple Applications |
Technical Q&As |
2005-04-04
|
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Help Book Caching During Software Development
(HTML)
QA1409: Development situations that can potentially confuse Help Viewer
|
Tools |
Technical Q&As |
2005-03-30
|
|
Finding an NSView's current magnification.
(HTML)
QA1346: How to discover the current magnification (zoom level) of any NSView.
|
Graphics & Imaging, User Experience |
Technical Q&As |
2005-03-08
|
|
CFBundleIdentifier and user application access
(HTML)
QA1373: Describes the role of CFBundleIdentifier in limiting a user's application access.
|
Design Guidelines, Security |
Technical Q&As |
2005-02-08
|
|
Public UTIs supported by Mac OS X v10.3
(HTML)
QA1406: Lists the public UTIs (Uniform Type Identifiers) used by the Pasteboard in Mac OS X v10.3.
|
Interapplication Communication |
Technical Q&As |
2005-02-08
|
|
Variable arguments in Objective-C methods
(HTML)
QA1405: How to implement methods which take a variable number of arguments.
|
Objective-C Language |
Technical Q&As |
2005-01-13
|
|
Resolves may return an IPv6 address in Panther
(HTML)
QA1298: Explains why you get an IP address of 0.0.0.0 when resolving a Bonjour service.
|
Networking |
Technical Q&As |
2005-01-10
|
|
NSOpenGLView redraw problems after a window is closed and re-opened.
(HTML)
QA1353: Workaround for NSOpenGLView failure to draw after its window is closed and re-opened.
|
Graphics & Imaging |
Technical Q&As |
2004-12-03
|
|
Why aren't my tracking rects working?
(HTML)
QA1355: Describes a common mistake in setting up cursor-tracking rectangles.
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Events & Other Input, User Experience |
Technical Q&As |
2004-12-02
|
|
Sending an Email
(HTML)
QA1084: Shows how to create an email in the user's prefered email application.
|
Interapplication Communication, Internet & Web, Networking |
Technical Q&As |
2004-11-05
|
|
Using Interface Builder's NSOpenGLView or Custom View objects for an OpenGL application
(HTML)
QA1167: Describes usage cases for both NSOpenGLViews and Custom Views for Cocoa OpenGL applications
|
Graphics & Imaging |
Technical Q&As |
2004-10-28
|
|
Sorting Like the Finder
(HTML)
QA1159: Shows how to sort strings like the Finder's list view.
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File Management, Text & Fonts |
Technical Q&As |
2004-10-27
|
|
Preventing sleep
(HTML)
QA1160: Explains how your application can prevent the system from sleeping.
|
Resource Management |
Technical Q&As |
2004-10-22
|
|
How do I determine how much VRAM is available on my video card?
(HTML)
QA1168: Using Core Graphics and IOKit to find the physical size of VRAM on installed hardware.
|
Graphics & Imaging |
Technical Q&As |
2004-10-11
|
|
Movies - Saving movie playback hints
(HTML)
QA1366: Explains how to save and load media play hints from Movie files.
|
QuickTime |
Technical Q&As |
2004-09-14
|
|
Setting the ColorSync profile for a NSBitmapImageRep object
(HTML)
QA1369: Setting the ColorSync profile for a NSBitmapImageRep object
|
Graphics & Imaging |
Technical Q&As |
2004-09-08
|
|
Bonjour enforces the TXT record format in Panther
(HTML)
QA1306: Explains how mDNSResponder enforces the proper TXT record format in Panther.
|
Networking |
Technical Q&As |
2004-07-14
|
|
Updating the TXT record of a Bonjour service
(HTML)
QA1302: Explains how to update a Bonjour TXT record while running on either Jaguar or Panther.
|
Networking |
Technical Q&As |
2004-07-14
|
|
Graphics Exporters - Creating 16-bit-per-channel image files
(HTML)
QA1354: Discusses how to use QuickTime Graphics Exporters to create 16-bit-per-channel image files.
|
QuickTime |
Technical Q&As |
2004-06-03
|
|
Discovering all advertised Bonjour service types
(HTML)
QA1337: Explains how to discover all Bonjour service types being advertised on the local network.
|
Networking |
Technical Q&As |
2004-06-01
|
|
Avoiding the -42 error with DiscRecording
(HTML)
QA1292: Explains how to workaround the -42 error when using the DiscRecording API.
|
File Management |
Technical Q&As |
2004-05-25
|
|
Bonjour enforces the service type format in Panther
(HTML)
QA1198: Explains why registering a Bonjour service might fail on Panther.
|
Networking |
Technical Q&As |
2004-03-23
|
|
Use the Computer Name when registering your Bonjour service
(HTML)
QA1228: Explains why you should use the Computer Name when advertising a Bonjour service.
|
Networking |
Technical Q&As |
2004-03-05
|
|
Shearing a Coordinate Space with NSAffineTransform
(HTML)
()
QA1332: Describes a simple way to shear coordinate spaces by adding a few methods to the NSAffineTransform class.
|
Graphics & Imaging |
Technical Q&As |
2004-01-29
|
|
Downloading through a proxy server in Mac OS X
(HTML)
QA1296: Explains when downloading through a proxy server will work, and when it will fail.
|
Networking |
Technical Q&As |
2003-10-29
|
|
Environment Variables
(HTML)
QA1255: Describes how a process gets its environment variables.
|
Runtime Architecture |
Technical Q&As |
2003-10-29
|
|
Bonjour TXT record rate limiting in Panther
(HTML)
QA1293: Explains how mDNSResponder implements TXT record rate limiting in Panther.
|
Networking |
Technical Q&As |
2003-10-23
|
|
Third party VFS can't unmount on Mac OS X 10.3
(HTML)
QA1308: Describes changes in unmounting behavior for VFS plug-ins under Mac OS X 10.3 "Panther."
|
File Management |
Technical Q&As |
2003-10-23
|
|
Bonjour and wake from sleep
(HTML)
QA1290: Explains why applications that use Bonjour should stay registered and continue browsing on sleep.
|
Networking |
Technical Q&As |
2003-09-18
|
|
How to add other pasteboard types to an HFS Promise drag in Cocoa
(HTML)
QA1300: Explains how to add other pasteboard types to an HFS Promise drag in Cocoa.
|
Interapplication Communication |
Technical Q&As |
2003-09-15
|
|
How to remove the "Open Recent" menu item in a Document-based Cocoa application
(HTML)
QA1289: Explains how to remove the "Open Recent" menu item in a Document-based Cocoa application.
|
User Experience |
Technical Q&As |
2003-09-15
|
|
How to set a custom drag image when doing an HFS Promise drag in Cocoa
(HTML)
QA1200: Explains how to set a custom drag image when doing an HFS Promise drag in Cocoa.
|
Interapplication Communication, User Experience |
Technical Q&As |
2003-09-15
|
|
CFXML to CFPropertyListRef (and back!)
(HTML)
()
QA1208: Describes to how save and restore a CFPropertyListRef to and from an XML file.
|
Data Management |
Technical Q&As |
2003-08-29
|
|
CGImageRef contents are immutable
(HTML)
()
QA1276: Explains that CGImageRef contents are considered immutable once created.
|
Graphics & Imaging |
Technical Q&As |
2003-07-17
|
|
Is ColorSync thread safe?
(HTML)
()
QA1261: Discusses ColorSync thread-safety issues.
|
Graphics & Imaging |
Technical Q&As |
2003-04-17
|
|
PPPoE Server for Testing
(HTML)
()
QA1252: Describes how to configure Mac OS X as a PPPoE server for testing purposes.
|
Networking |
Technical Q&As |
2003-04-11
|
|
FSSetCatalogInfo versus UID and GID
(HTML)
()
QA1251: Describes why FSSetCatalogInfo does not set the UID and GID of the file, and provides a work around.
|
File Management |
Technical Q&As |
2003-03-26
|
|
Quartz 2D Thread Safety
(HTML)
()
QA1238: Explains the thread-safety issues for the Quartz 2D API.
|
Graphics & Imaging, Performance, Printing |
Technical Q&As |
2003-02-25
|
|
Converting to Precomposed Unicode
(HTML)
()
QA1235: Describes how to convert a string to precomposed Unicode.
|
Internationalization, Text & Fonts |
Technical Q&As |
2003-02-07
|
|
BOM characters in 'utxt' clipboard flavor
(HTML)
()
QA1221: Explains the use of the BOM character in 'utxt' scrap data
|
Data Management, Interapplication Communication |
Technical Q&As |
2003-01-20
|
|
How do I tell if a particular display is being hardware accelerated by Quartz Extreme?
(HTML)
()
QA1218: Describes how to use CGDisplayUsesOpenGLAcceleration to see if a display is accelerated or not.
|
Games, Graphics & Imaging, Performance |
Technical Q&As |
2002-12-04
|
|
How can I programmatically determine the DPI of the current video mode?
(HTML)
()
QA1217: Describes how to compute the DPI for a given display in a given mode using Core Graphics.
|
Games, Graphics & Imaging |
Technical Q&As |
2002-12-02
|
|
Quartz 2D Interpolation
(HTML)
()
QA1186: Explains how to control Quartz 2D's image interpolation.
|
Graphics & Imaging, Printing |
Technical Q&As |
2002-10-29
|
|
Why does -stringByTrimmingCharactersInSet: give me an empty string result when it shouldn't?
(HTML)
()
QA1202: Why -stringByTrimmingCharactersInSet: sometimes returns an empty string result in Mac OS X 10.2.x when it shouldn't.
|
Data Management |
Technical Q&As |
2002-10-15
|
|
Preventing crashes when using multiple disabled but editable NSComboBoxes
(HTML)
()
QA1142: How to prevent a crash when using multiple disabled -- but editable --NSComboBoxes in a view.
|
User Experience |
Technical Q&As |
2002-06-03
|
|
Solving NSTabView drawing problems in Mac OS X 10.1.x
(HTML)
()
QA1117: Explains how to work around NSTabView draw problems in Mac OS X 10.1.x
|
User Experience |
Technical Q&As |
2002-02-14
|
|
Power Management; Policy Maker vs. Power Controller
(HTML)
()
QA1121: Describes the differences between a Power Management Policy Maker and a Power Management Power Controller.
|
Events & Other Input |
Technical Q&As |
2002-02-13
|
|
Static linking of user binaries on Mac OS X
(HTML)
()
QA1118: Explains why static linking of user binaries is not supported on Mac OS X, and possible workarounds.
|
Runtime Architecture |
Technical Q&As |
2002-02-07
|
|
Background-only apps with NSStatusItems become active in 10.1 on NSStatusItem clicks
(HTML)
QA1081: Preventing background-only apps from activating when their NSStatusItem(s) are clicked in Mac OS X 10.1.
|
Events & Other Input, User Experience |
Technical Q&As |
2001-10-30
|
|
Setting environment variables for user processes
(HTML)
QA1067: Tells how to set environment variables for user processes.
|
Data Management, Games, Porting, Runtime Architecture, Tools |
Technical Q&As |
2001-10-25
|
|
CGContextClosePath
(HTML)
QA1046: Explains when you should call CGContextClosePath.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-10-02
|
|
Saving the current Core Graphics Path
(HTML)
QA1056: Explains that the Core Graphics save and restore GState APIs do not affect the path.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-10-02
|
|
Comparing selectors in Cocoa-Java code
(HTML)
Deprecated - QA1069: Explains why Objective-C and Java selectors appear to be the same name but equality tests fail.
|
Java |
Technical Q&As |
2001-08-31
|
|
CGContext Bounds
(HTML)
QA1048: Explains how to determine the bounds of a CGContext.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-07-02
|
|
CGContextAddLineToPoint, CGContextAddCurveToPoint, et. al.
(HTML)
QA1049: Explains why the CGContextAddXYZ APIs don't draw anything immediately.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-07-02
|
|
Drawing a Path Multiple Times
(HTML)
QA1047: Explains that path drawing operations consume the path.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-07-02
|
|
Turning Off Core Graphics Clipping
(HTML)
QA1050: Explains how to clear the clipping path for a CGContext.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-07-02
|
|
Unexpected CG state changes
(HTML)
QA1045: Explains why the Core Graphics drawing state sometimes changes for no apparent reason.
|
Graphics & Imaging, Printing |
Technical Q&As |
2001-07-02
|
|
Getting NSWindow's toolbar actions to show up in Interface Builder
(HTML)
QA1030: How to add the missing -toggleToolbarShown: and -runToolbarCustomizationPalette actions to Interface Builder.
|
Tools, User Experience |
Technical Q&As |
2001-05-03
|
|
How to get custom views to show up in NSToolbarItems
(HTML)
QA1029: Why custom views may not show up in an NSToolBarItem and how to make it visible.
|
User Experience |
Technical Q&As |
2001-05-03
|
|
Detecting specific ROM-in-RAM Mac
(HTML)
()
Deprecated - HW49: Identifying a Mac by name ("iMac"), and better alternatives for determining specific features ("has Firewire").
|
Design Guidelines, Runtime Architecture |
Technical Q&As |
1999-10-05
|
|
Allocate and Disk Full Error
(HTML)
()
FL12: Discusses a problem with AFP volumes displaying incorrect free space, and returning disk full errors.
|
Networking |
Technical Q&As |
1999-07-21
|
|
Changing the TCP Window Size
(HTML)
NW47: Describes how to change the TCP window size in Open Transport.
|
Networking |
Technical Q&As |
1997-03-14
|
|
T_DATA_REQ vs M_DATA TPI Message Blocks
(HTML)
()
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
|
Networking |
Technical Q&As |
1996-10-25
|
