I'm adding AppleScriptability to my app. My app can open its documents from
its File menu. But when I execute an AppleScript [1] to do open one,
somebody sends -count to a NSCFString, and I get an exception in the Console
output [2].
This same AppleScript works fine if I change "tell application 'MyApp'" to
instead "tell application 'TextEdit'".
I set a breakpoint in [NSException raise] (*) and examined the stack trace
[2.] when the exception occurs. It occurs during -[NSApplication
handleOpenScriptCommand:]. Duh.
I don't know where to look. Before the error occurs, my
-applicationDidFinishLaunching completes successfully.
My NSDocumentController's subclass'
-openDocumentWithContentsOfURL:display:error:
and NSDocument subclass' -loadDataRepresentation:ofType:
never run; apparently the exception occurs within the Cocoa framework,
before they are even invoked.
The exception suggests that some argument in the NSScriptCommand* passed to
handleOpenScriptCommand, which is expected to respond to count, is in fact a
NSString. But that doesn't make any sense. The script debug output [3]
shows only one argument, the file:// url of the document to be opened, a
direct parameter. That should be all it needs, and all it looks for.
To see if this might be a Launch Services "environmental" problem, I tried
this on another Mac, but got the same result.
I'll try any reasonable suggestion...Thanks!
Jerry Krinock
(*) Thanks to "Advanced Mac OS X Programming", Dalrymple, Hilleglass for
this cute trick. In the debugger console, at the (gdb) prompt, type
break -[NSException raise]
**************************************
1. My AppleScript.
**************************************
tell application "Finder"
set fileAlias to alias
"JMiniHD:Users:jk:Migrations:m1.bdogmigr"
end tell
tell application "MyApp"
activate
open fileAlias
end tell
**************************************
2. Console output
**************************************
Command: Standard Suite.open
Direct Parameter: file://localhost/Users/jk/Migrations/m1.bdogmigr
Receivers: (null)
Arguments: {
"" = file://localhost/Users/jk/Migrations/m1.bdogmigr;
}
*** -[NSCFString count]: selector not recognized [self = 0x5afaf0]
*** -[NSCFString count]: selector not recognized [self = 0x5afaf0]
Result: (null)
Error: 8 "NSInternalScriptError";
**************************************
3. Stack Trace
**************************************
in -[NSException raise]
in +[NSException raise:format:]
in -[NSObject doesNotRecognizeSelector:]
in -[NSObject(NSForwardInvocation) forward::]
in _objc_msgForward
in -[NSApplication _doOpenFiles:]
in -[NSApplication(NSAppleEventHandling) _handleAEOpenDocuments:]
in -[NSApplication(NSScripting) handleOpenScriptCommand:]
in objc_msgSendv
in -[NSInvocation invoke]
in -[NSInvocation invokeWithTarget:]
in -[NSScriptCommand executeCommand]
in -[NSScriptingAppleEventHandler handleCommandEvent:withReplyEvent:]
in -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:]
in _NSAppleEventManagerGenericHandler
in aeDispatchAppleEvent
in dispatchEventAndSendReply
in aeProcessAppleEvent
in AEProcessAppleEvent
in _DPSNextEvent
in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:]
in -[NSApplication run]
in NSApplicationMain
in main at main.m:7
