将变量传递给 AppleScript

Question

在 Xcode 中运行 AppleScript 的代码如下：

NSString *path = [[NSBundle mainBundle] pathForResource:@"Script" ofType:@"scpt"];

NSAppleScript *script = [[NSAppleScript alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:nil];

[script executeAndReturnError:nil];

在执行它之前，我想知道是否可以设置一些变量供其使用。换句话说，我想将变量从我的应用程序传递到 AppleScript。

Answer 1

我发现的最好的例子是 Quinn “The Eskimo!” 中的这段代码。在 Apple 开发者论坛上：

https://forums.developer.apple.com/thread/98830< /a>

AppleScript 文件：

on displayMessage(message)  
    tell application "Finder"  
        activate  
        display dialog message buttons {"OK"} default button "OK"  
    end tell  
end displayMessage 

从 Swift 调用 AppleScript 方法，传递参数：

import Carbon

// ...

let parameters = NSAppleEventDescriptor.list()
parameters.insert(NSAppleEventDescriptor(string: "Hello Cruel World!"), at: 0)

let event = NSAppleEventDescriptor(
    eventClass: AEEventClass(kASAppleScriptSuite),
    eventID: AEEventID(kASSubroutineEvent),
    targetDescriptor: nil,
    returnID: AEReturnID(kAutoGenerateReturnID),
    transactionID: AETransactionID(kAnyTransactionID)
)
event.setDescriptor(NSAppleEventDescriptor(string: "displayMessage"), forKeyword: AEKeyword(keyASSubroutineName))
event.setDescriptor(parameters, forKeyword: AEKeyword(keyDirectObject))

let appleScript = try! NSUserAppleScriptTask(url: yourAppleScriptFileURL)
appleScript.execute(withAppleEvent: event) { (appleEvent, error) in
    if let error = error {
        print(error)
    }
}

Answer 2

您可以使用方法：

- (id)initWithSource:(NSString *)source

并使用 stringWithFormat 来构建您的 applescript 源并设置参数。

NSString* scriptTemplate = ...;
NSString* actualScript = [NSString stringWithFormat:scriptTemplate, arg1, arg2, ... argN];
NSAppleScript *script = [[NSAppleScript alloc] initWithSource:actualScript];

您还可以设计一种更高级的替换机制，在“Script.scpt”中以某种方式标记参数，然后使用 stringByReplacingOccurrencesOfString:withString: 替换它们

Answer 3

带返回值处理的版本。 （基于 Quinn 的代码）

import Carbon
// ...
let script = """
on displayMessage(message)
    display dialog message
    return "hello…"
end displayMessage
"""

let handler = NSAppleEventDescriptor(string: "displayMessage")
let message = NSAppleEventDescriptor(string: "Hello AppleScript!")

let parameters = NSAppleEventDescriptor.list()
parameters.insert(message, at: 0)

let event = NSAppleEventDescriptor(
    eventClass: AEEventClass(kASAppleScriptSuite),
    eventID: AEEventID(kASSubroutineEvent),
    targetDescriptor: nil,
    returnID: AEReturnID(kAutoGenerateReturnID),
    transactionID: AETransactionID(kAnyTransactionID)
)
event.setDescriptor(handler, forKeyword: AEKeyword(keyASSubroutineName))
event.setDescriptor(parameters, forKeyword: AEKeyword(keyDirectObject))

var error: NSDictionary?
if let appleScript = NSAppleScript(source: script) {
    if let outputString = appleScript.executeAppleEvent(event, error: &error).stringValue {
        print("output: ", outputString)
    } else if (error != nil) {
        print("error: ", error!)
    }
}