为什么在为我编写的程序执行 AppleScript 时出现错误 -1708?

Why do I get error -1708 when executing an AppleScript for a program that I wrote?

我正在尝试将 AppleScript 支持添加到我编写的程序中。它应该相当简单,我已经将其简化为绝对基础 - 但我仍然收到错误 -1708。

我的程序的sdef如下:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dictionary SYSTEM "file://localhost/System/Library/DTDs/sdef.dtd">
<dictionary title="AppleScript Test">
    <suite name="AppleScript Test Suite" code="ASTS" description="AppleScript Test Scripts">
        
        <command name="open" code="aevtodoc" description="Open a document.">
            <direct-parameter description="The file(s) to be opened.">
                <type type="file"/>
                <type type="file" list="yes"/>
            </direct-parameter>
            <result description="The opened document(s).">
                <type type="document"/>
                <type type="document" list="yes"/>
            </result>
        </command>

        <command name="quit" code="aevtquit" description="Quit the application.">
            <cocoa class="NSQuitCommand"/>
            <parameter name="saving" code="savo" type="save options" optional="yes" description="Should changes be saved before quitting?">
                <cocoa key="SaveOptions"/>
            </parameter>
        </command>

        <command name="run test" code="astsrunt" description="Run test code with a script">
            <cocoa class="RunTestCommand"/>
            <result type="text" description="A return string to show that it works okay"/>
        </command>
                
    </suite>
</dictionary>

RunTestCommandclass实现如下:

RunTestCommand.h

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface RunTestCommand : NSObject

@end

NS_ASSUME_NONNULL_END

RunTestCommand.m

#import "RunTestCommand.h"

@implementation RunTestCommand

-(id)performDefaultImplementation {
    NSString* returnString = @"Hello World"; // <-- There's a breakpoint here which never gets tripped
    return returnString; 
}

@end

我还确保应用程序设置为可编写脚本并且 sdef 在 info.plist 中定义。当我将应用程序拖到脚本编辑器上时,它的字典显示正确。也就是说,以下脚本导致错误 -1708 并且未完成。

测试脚本

tell application "AppleScript Test Program"
    activate
    run test
end tell

我的直觉告诉我这是一个牛皮纸袋的错误,但我看不出来。任何人都可以提出可能是什么问题吗?

RunTestCommand 需要继承自 NSScriptCommand 或其子类之一。例如。 RunTestCommand.h 应该是:

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface RunTestCommand : NSScriptCommand

@end

NS_ASSUME_NONNULL_END