从 OS X 上 iTunes 中当前播放的音频中获取音频元数据

Question

我正在 OS X 上用 Swift 编写应用程序。有没有办法在 iTunes 中获取当前正在播放的音频？我想获取标题、艺术家等详细信息。

我已经找到了什么：

1. Here is an Objective C example, but not all those methods are available with Swift.

2. This example uses AppleScript, which I might have to do. But I'd rather use Swift if possible.

Answer 1

下面是一个简单的例子，如何从当前音轨中获取属性：

在（El Capitan v10.11.5、iTunes 12.4 和 Xcode 7.3）上测试。

import Cocoa
import ScriptingBridge
@objc protocol iTunesApplication {
    optional func currentTrack()-> AnyObject
    optional var properties: NSDictionary {get}
    //if you need another object or method from the iTunes.h, you must add it here
}

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {

    func applicationDidFinishLaunching(aNotification: NSNotification) {
        let iTunesApp: AnyObject = SBApplication(bundleIdentifier: "com.apple.iTunes")!
        let trackDict = iTunesApp.currentTrack!().properties as Dictionary
        if (trackDict["name"] != nil) {// if nil then no current track
            print(trackDict["name"]!) // print the title
            print(trackDict["artist"]!)
            print(trackDict["album"]!)
            print(trackDict["playedCount"]!)
            // print(trackDict) // print the dictionary
        }
    }
}