Question

我正在尝试通过python连接到Mountain Lion通知中心。我安装了pyobjc，并按照here和here的说明操作。另请参阅：Working with Mountain Lion's Notification Center using PyObjC

这是我的代码：

import Foundation, objc
import AppKit
import sys

NSUserNotification = objc.lookUpClass('NSUserNotification')
NSUserNotificationCenter = objc.lookUpClass('NSUserNotificationCenter')

def notify(title, subtitle, info_text, delay=0, sound=False, userInfo={}):
    """ Python method to show a desktop notification on Mountain Lion. Where:
        title: Title of notification
        subtitle: Subtitle of notification
        info_text: Informative text of notification
        delay: Delay (in seconds) before showing the notification
        sound: Play the default notification sound
        userInfo: a dictionary that can be used to handle clicks in your
                  app's applicationDidFinishLaunching:aNotification method
    """
    notification = NSUserNotification.alloc().init()
    notification.setTitle_(title)
    notification.setSubtitle_(subtitle)
    notification.setInformativeText_(info_text)
    notification.setUserInfo_(userInfo)
    if sound:
        notification.setSoundName_("NSUserNotificationDefaultSoundName")
    notification.setDeliveryDate_(Foundation.NSDate.dateWithTimeInterval_sinceDate_(delay, Foundation.NSDate.date()))
    NSUserNotificationCenter.defaultUserNotificationCenter().scheduleNotification_(notification)

当我用参数调用notify函数时，我得到一个属性错误：

AttributeError: 'NoneType' object has no attribute 'scheduleNotification_'

我不明白为什么NSUserNotificationCenter.defaultUserNotificationCenter()返回一个NoneType对象。我无法在互联网或SO上查询此事。

Answer 1

因此，使用Ned的默认python建议可以正常工作。当我在32位enthought发行版上安装pyobjc时，它也有效。在我看来，pyobjc仅适用于32位python发行版（我无法证实这一点，但到目前为止，似乎是这种情况）。

（注意：当我发布问题时，我已经在64位enthought发行版上安装了pyobjc）。

NSUserNotificationCenter.defaultUserNotificationCenter（）在python中返回None

1 个答案: