我正在尝试创建一个在菜单栏中运行，没有窗口或停靠图标的倒数计时器应用程序。我是从网上找到的大部分教程中构建的，我知道代码有些混乱（我计划在代码正常运行后进行清理）。我遇到的问题。在AppDelegate中，我没有任何问题地创建了StatusBar项目，但是我不知道如何从viewController中进行更新。相反，它正在创建一个新的StatusBar项。
// AppDelegate信息
class AppDelegate: NSObject, NSApplicationDelegate
{
let item = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
let popover = NSPopover()
func applicationDidFinishLaunching(_ aNotification: Notification)
{
menuBarRefresh(self)
}
func menuBarRefresh(_ sender: Any?)
{
if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
//button.title = initialTime.stringValue
button.action = #selector(togglePopover(_:))
}
popover.contentViewController = TimerViewController.freshController()
}
@objc func togglePopover(_ sender: Any?)
{
if popover.isShown
{
closePopover(sender: sender)
}
else
{
showPopover(sender: sender)
}
}
func showPopover(sender: Any?)
{
if let button = item.button
{
popover.show(relativeTo: button.bounds, of: button, preferredEdge: NSRectEdge.minY)
}
}
func closePopover(sender: Any?)
{
popover.performClose(sender)
}
//控制器代码
import Cocoa
import AVFoundation
//Checking to ensure entered data is numeric
extension String
{
var isNumeric: Bool
{
let range = self.rangeOfCharacter(from: CharacterSet.decimalDigits.inverted)
return (range == nil)
}
}
class TimerViewController: NSViewController
{
//Here's the texts fields for the user to enter content.
@IBOutlet var hourInput: NSTextField!
@IBOutlet var minuteInput: NSTextField!
@IBOutlet var secondInput: NSTextField!
//This is the label used to display the counter
@IBOutlet var initialTime: NSTextField!
//Here are the variables we're going to need
var hours = Int() //Place holder for the hours
var minutes = Int() //Place holder for the hours
var seconds = Int() //Place holder for the hours
var timer = Timer() //The timer we'll use later
var audioPlayer = AVAudioPlayer() //The audio player
var timeRemaining = Int() //Place holder for the total 'seconds' to be counted
var firstRun = Bool()
let item = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
override func viewDidLoad()
{
super.viewDidLoad()
getData() //Pull last saved time from Core Data and load it.
hourInput.stringValue = "\(hours)" //Loading the hours into the hours field
minuteInput.stringValue = "\(minutes)" //Loading the minutes into the minutes field
secondInput.stringValue = "\(seconds)" //Loading the seconds into the seconds field
initialTime.stringValue = "00:00:00" //Resetting the 'counter' to 0
firstRun = true
updateStatusBar(self)
//Here we load up the audio file for the 'done' chime. If not available we print the catch
do
{
let audioPath = Bundle.main.path(forResource: "Done", ofType: "m4a")
try audioPlayer = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath!))
}
catch
{
print("No Joy")
}
/* if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
button.title = initialTime.stringValue
button.action = #selector(togglePopover(_:))
}
*/ }
}
// MARK: Storyboard instantiation
extension TimerViewController
{
static func freshController() -> TimerViewController
{
let storyboard = NSStoryboard(name: NSStoryboard.Name("Main"), bundle: nil)
let identifier = NSStoryboard.SceneIdentifier("TimerViewController")
guard let viewcontroller = storyboard.instantiateController(withIdentifier: identifier) as? TimerViewController
else
{
fatalError("Why can't I find TimerViewController? - Check Main.storyboard")
}
return viewcontroller
}
}
//Button actions follow
extension TimerViewController
{
@IBAction func clearButton(_ sender: Any)
{
clearFields()
timer.invalidate()
audioPlayer.stop()
}
@IBAction func pauseButton(_ sender: Any)
{
timer.invalidate()
}
@IBAction func quitButton(_ sender: Any)
{
exit(0)
}
@IBAction func startButton(_ sender: Any)
{
grabData()
setData()
timeRemaining = (hours*3600)+(minutes*60)+seconds
if timeRemaining <= 0
{
initialTime.stringValue = "Enter Time"
}
else
{
displayTime()
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.startCountDown), userInfo: nil, repeats: true)
clearFields()
updateStatusBar(self)
}
}
}
//MARK: Other Functions
extension TimerViewController
{
func displayTime()
{
let secondsDisplay = String(format: "%02d", (timeRemaining%60))
let minutesDisplay = String(format: "%02d", (timeRemaining%3600)/60)
initialTime.stringValue = "\(timeRemaining/3600):\(minutesDisplay):\(secondsDisplay)"
}
func grabData()
{
hours = hourInput.integerValue
minutes = minuteInput.integerValue
seconds = secondInput.integerValue
}
func clearFields()
{
hourInput.stringValue = ""
minuteInput.stringValue = ""
secondInput.stringValue = ""
initialTime.stringValue = "00:00:00"
}
func setData()
{
setHour()
setMinute()
setSecond()
}
func getData()
{
getHour()
getMinute()
getSecond()
}
@objc func showTimer(_ sender: Any?)
{
print("Are we here")
}
@objc func startCountDown()
{
timeRemaining -= 1
displayTime()
updateStatusBar(self)
print(timeRemaining)
if timeRemaining == 0
{
timer.invalidate()
audioPlayer.play()
}
}
/* func setNeedsStatusBarAppearanceUpdate()
{
button.image = NSImage(named: NSImage.Name("2"))
button.action = #selector(showTimer(_:))
}
*/
func updateStatusBar(_ sender: Any?)
{
if let button = item.button
{
button.image = NSImage(named: NSImage.Name("2"))
button.action = #selector(showTimer(_:))
button.title = initialTime.stringValue
}
//let menu = NSMenu()
//menu.addItem(NSMenuItem(title: "Clear Timer", action: #selector(AppDelegate.theDv2), keyEquivalent: "R"))
//menu.addItem(NSMenuItem(title: "Quit Timer", action: #selector(AppDelegate.quit), keyEquivalent: "Q"))
//item.menu = menu
}
}
///这里有很多CoreData的东西，但是我忽略了。我主要是在使用CoreData来学习如何以及功能原因是存储和加载上次使用时间
由于它当前有效，所以我得到了两个StatusBar项，而不是使用AppDelegate创建一个，然后从ViewController更新该项。
答案 0 :(得分：0)
是的... Id-10-t错误在这里。只需在课外声明“ item”，一切都很好。经过一段良好的睡眠和远离计算机的时间后，我意识到我并未在全球范围内声明“项目”。