如何使用Cocoa和Python（PyObjC）创建状态栏项？

Question

我在XCode中创建了一个全新的项目，并在我的AppDelegate.py文件：

from Foundation import *
from AppKit import *

class MyApplicationAppDelegate(NSObject):
    def applicationDidFinishLaunching_(self, sender):
        NSLog("Application did finish launching.")

        statusItem = NSStatusBar.systemStatusBar().statusItemWithLength_(NSVariableStatusItemLength)
        statusItem.setTitle_(u"12%")
        statusItem.setHighlightMode_(TRUE)
        statusItem.setEnabled_(TRUE)

但是，当我启动应用程序时，没有显示状态栏项。所有其他代码主.pymain.m是默认值。在

Answer 1

上面的.retain（）用法是必需的，因为从ApplicationIDFinishLaunching（）方法返回时statusItem将被销毁。使用将该变量绑定为MyApplicationAppDelegate实例中的字段自身状态项相反。在

下面是一个修改后的示例，它不需要.xib/等。。。在

from Foundation import *
from AppKit import *
from PyObjCTools import AppHelper

start_time = NSDate.date()


class MyApplicationAppDelegate(NSObject):

    state = 'idle'

    def applicationDidFinishLaunching_(self, sender):
        NSLog("Application did finish launching.")

        self.statusItem = NSStatusBar.systemStatusBar().statusItemWithLength_(NSVariableStatusItemLength)
        self.statusItem.setTitle_(u"Hello World")
        self.statusItem.setHighlightMode_(TRUE)
        self.statusItem.setEnabled_(TRUE)

        # Get the timer going
        self.timer = NSTimer.alloc().initWithFireDate_interval_target_selector_userInfo_repeats_(start_time, 5.0, self, 'tick:', None, True)
        NSRunLoop.currentRunLoop().addTimer_forMode_(self.timer, NSDefaultRunLoopMode)
        self.timer.fire()

    def sync_(self, notification):
        print "sync"

    def tick_(self, notification):
        print self.state


if __name__ == "__main__":
    app = NSApplication.sharedApplication()
    delegate = MyApplicationAppDelegate.alloc().init()
    app.setDelegate_(delegate)
    AppHelper.runEventLoop()