你所寻找的是,NSDistributedNotificationCenter或NSWorkspace,这些可可类发布的应用程序事件,工作区,像应用程序启动的通知,安装驱动器等
的Python中做到这一点,你需要PyObjC,这基本上是苹果可可类的python绑定。这些文档在他们的网站上是稀少的,这是有原因的,因为文档基本上与Apple文档相同,所以它们只包括pyobjc api和cocoa API之间的区别。如果你了解目标c api如何转换为python,那么你很好。检查这里:http://pyobjc.sourceforge.net/documentation/pyobjc-core/intro.html
我已经包括一个例子,下面使用python侦听分布式通知。下面的代码基本上添加了一个观察者,并侦听iTunes通知。你可以遵循一个类似的结构,但是添加一个NSWorkspace的观察者。为了弄清楚你应该听什么,有一个应用程序将显示所有通过你的系统的通知。它被称为notification watcher。用它来确定你应该听的东西。您也可以将目标c代码转换为python。
什么下面的代码是做
- 定义一个新的类,从NSObject的继承,通过PyObjC
- 定义定义一个方法,它被传递的实际通知,并打印出来
- 创建Foundation.NSDistributedNotificationCenter的一个实例。defaultCenter
- 创建GetSongs的实例
- 注册一个观察者,向它传递类,当接收到通知时调用和该申请&事件来监视即“com.apple.iTunes.playerInfo”
该方法
- 运行事件循环,
一件事,会让你出错,访问属性(Objective C的属性)不工作一样访问蟒蛇属性。即在Python的Python为目标C做class_name.att
你要称呼它从下面我举的例子,即一个功能:song.userInfo()
import Foundation
from AppKit import *
from PyObjCTools import AppHelper
class GetSongs(NSObject):
def getMySongs_(self, song):
print "song:", song
song_details = {}
ui = song.userInfo()
print 'ui:', ui
for x in ui:
song_details[x] = ui.objectForKey_(x)
print song_details
nc = Foundation.NSDistributedNotificationCenter.defaultCenter()
GetSongs = GetSongs.new()
nc.addObserver_selector_name_object_(GetSongs, 'getMySongs:', 'com.apple.iTunes.playerInfo',None)
NSLog("Listening for new tunes....")
AppHelper.runConsoleEventLoop()
这里的实际输出的一个例子...(YES BRITNEY ROCKS!NOT !;)
song NSConcreteNotification 0x104c0a3b0 {name = com.apple.iTunes.playerInfo; object = com.apple.iTunes.player; userInfo = {
Album = Circus;
"Album Rating" = 0;
"Album Rating Computed" = 1;
Artist = "Britney Spears";
"Artwork Count" = 1;
Genre = Pop;
"Library PersistentID" = 8361352612761174229;
Location = "file://localhost/Users/izze/Music/iTunes/iTunes%20Music/Britney%20Spears/Circus/02%20Circus.mp3";
Name = Circus;
PersistentID = 4028778662306031905;
"Play Count" = 0;
"Play Date" = "2010-06-26 08:20:57 +0200";
"Player State" = Playing;
"Playlist PersistentID" = 7784218291109903761;
"Rating Computed" = 1;
"Skip Count" = 1;
"Skip Date" = "2010-06-26 12:20:57 +0200";
"Store URL" = "itms://itunes.com/link?n=Circus&an=Britney%20Spears&pn=Circus";
"Total Time" = 192444;
"Track Count" = 16;
"Track Number" = 2;
}}
ui {
Album = Circus;
"Album Rating" = 0;
"Album Rating Computed" = 1;
Artist = "Britney Spears";
"Artwork Count" = 1;
Genre = Pop;
"Library PersistentID" = 8361352612761174229;
Location = "file://localhost/Users/izze/Music/iTunes/iTunes%20Music/Britney%20Spears/Circus/02%20Circus.mp3";
Name = Circus;
PersistentID = 4028778662306031905;
"Play Count" = 0;
"Play Date" = "2010-06-26 08:20:57 +0200";
"Player State" = Playing;
"Playlist PersistentID" = 7784218291109903761;
"Rating Computed" = 1;
"Skip Count" = 1;
"Skip Date" = "2010-06-26 12:20:57 +0200";
"Store URL" = "itms://itunes.com/link?n=Circus&an=Britney%20Spears&pn=Circus";
"Total Time" = 192444;
"Track Count" = 16;
"Track Number" = 2;
}
{u'Album Rating Computed': 1, u'Album': u'Circus', u'Rating Computed': True, u'Name': u'Circus', u'Artist': u'Britney Spears', u'Track Number': 2, u'Skip Date': 2010-06-26 12:20:57 +0200, u'Library PersistentID': 8361352612761174229L, u'Player State': u'Playing', u'Total Time': 192444L, u'Genre': u'Pop', u'Playlist PersistentID': 7784218291109903761L, u'Album Rating': 0, u'Location': u'file://localhost/Users/izze/Music/iTunes/iTunes%20Music/Britney%20Spears/Circus/02%20Circus.mp3', u'Skip Count': 1, u'Track Count': 16L, u'Artwork Count': 1, u'Play Date': 2010-06-26 08:20:57 +0200, u'PersistentID': 4028778662306031905L, u'Play Count': 0, u'Store URL': u'itms://itunes.com/link?n=Circus&an=Britney%20Spears&pn=Circus'}