UNTimeIntervalNotificationTrigger nextTriggerDate() 是不是给出了错误的日期？

Posted 2023-02-23

【中文标题】UNTimeIntervalNotificationTrigger nextTriggerDate() 是不是给出了错误的日期？

【英文标题】：Does UNTimeIntervalNotificationTrigger nextTriggerDate() give the wrong date?UNTimeIntervalNotificationTrigger nextTriggerDate() 是否给出了错误的日期？

【发布时间】：2016-11-03 21:48:52

【问题描述】：

我正在更新我的本地通知以与 ios 10 一起使用，我遇到了一个问题，我认为 nextTrigger 函数返回不是“满足触发条件的下一个日期”。而是返回当前日期时间加上您最初将 UNTimeInvervalNotificationTrigger 设置为的任何内容。

因此，如果您将触发器设置为在 60 秒内关闭，从文档中我希望当我调用 nextTriggerDate() 时，我会让它返回我设置触发器 + 60 秒时的任何日期时间.因此，如果我将其设置为 12:00:00，我希望 nextTriggerDate() 将是 12:01:00。但是我遇到的是它返回当前日期为 + 60 秒的任何内容。

我编写了一个示例，它安排了 UNTimeIntervalNotificationTrigger，然后每秒打印出 nextTriggerDate()。当我运行它时，我每秒都会得到一个新的 nextTriggerDate。像这样：

            //Optional(2016-11-03 21:26:31 +0000)
            //Optional(2016-11-03 21:26:32 +0000)
            //Optional(2016-11-03 21:26:33 +0000)
            //Optional(2016-11-03 21:26:34 +0000)
            //Optional(2016-11-03 21:26:35 +0000)
            //Optional(2016-11-03 21:26:36 +0000)

我已经用苹果开了一个 TSI，但是……你知道……这需要一段时间。所以我想我会看看这里是否有人有任何见解。我怀疑这是一个错误，如果我得到更多信息，我会更新它。

这是我用来说明问题的代码：

import UIKit
import UserNotifications

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource 
    @IBOutlet weak var setButton: UIButton!

    @IBOutlet weak var timePicker: UIPickerView!

    weak var timer: Timer?

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    

    @IBAction func setButtonAction(_ sender: UIButton) 
        var mySecond = pickerSelection

        // build notification
        let content = UNMutableNotificationContent()
        content.title = "Title of notification"
        content.body = "This is the body of the notification"
        content.sound = UNNotificationSound.default()
        content.categoryIdentifier = "myCategory"

        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: Double(mySecond), repeats: false)

        let request = UNNotificationRequest(identifier: "test notification", content: content, trigger: trigger)

        UNUserNotificationCenter.current().add(request) (error) in
            if let error = error 
                print("Uh oh! We had an error: \(error)")
            
        

        self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.tick), userInfo: nil, repeats: true)
    

    let pickerData = [":00",":01",":02",":03",":04",":05",":06",":07",":08",":09",":10",":11",":12",":13",":14",":15",":16",":17",":18",":19",":20",":21",":22",":23",":24",":25",":26",":27",":28",":29",":30",":31",":32",":33",":34",":35",":36",":37",":38",":39",":40",":41",":42",":43",":44",":45",":46",":47",":48",":49",":50",":51",":52",":53",":54",":55",":56",":57",":58",":59"]


    var pickerSelection = 0


    override func viewDidLoad() 
        super.viewDidLoad()
        self.timePicker.dataSource = self
        self.timePicker.delegate = self
        self.timePicker.selectRow(pickerSelection, inComponent: 0, animated: false)
    

    // The number of columns of data
    func numberOfComponents(in pickerView: UIPickerView) -> Int 
        return 1
    

    // The number of rows of data
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int 
        return pickerData.count
    

    // The data to return for the row and component (column) that's being passed in
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? 
        return pickerData[row]
    

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView 
        let pickerLabel = UILabel()
        let titleData = pickerData[row]
        let myTitle = NSAttributedString(string: titleData, attributes: [NSFontAttributeName:UIFont(name: "Futura", size: 44.0)!])
        pickerLabel.attributedText = myTitle
        pickerLabel.textAlignment = .center

        return pickerLabel
    

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) 
        pickerSelection = row
    

    func tick() 
        let center = UNUserNotificationCenter.current()
        center.getPendingNotificationRequests(completionHandler:  (scheduledLocalNotifications) in
            for localNotice in scheduledLocalNotifications 
                var localTrigger = localNotice.trigger as! UNTimeIntervalNotificationTrigger

                var localTime = localTrigger.nextTriggerDate()
                // ** This output shows something like this:

                //Optional(2016-11-03 21:26:31 +0000)
                //Optional(2016-11-03 21:26:32 +0000)
                //Optional(2016-11-03 21:26:33 +0000)
                //Optional(2016-11-03 21:26:34 +0000)
                //Optional(2016-11-03 21:26:35 +0000)
                //Optional(2016-11-03 21:26:36 +0000)
                print("\(localTime)")     
            
        )
    

【问题讨论】：

我遇到了和你一样的问题。在我看来，如果我在 12 点设置了 60 分钟的时间间隔，那么触发器的下一个日期是 13 点。但是，当我从 UNNotificationCenter 获得 request.trigger 时，我会打印 trigger.nextTriggerDate。日期不是 13 点。更重要的是，如果我在不同的时间打印它，值会发生变化。无论如何，感谢您的回答，它有效。

【参考方案1】：

收到 Apple DTS 的回复，并被告知我所描述的功能是其设计工作方式。尽管我曾认为文档对它的解释不同，但他们告诉我“考虑到实施，文档是乐观的”。无论如何，我通过跟踪代码中的触发日期来解决它。我希望这个答案可以帮助有同样问题的其他人。

【讨论】：

当时它并没有像我认为的那样工作。

他们在撒谎说它是设计的吗？下一个触发日期不正确，所以他们在愚弄谁？？

我和你一样需要知道什么时候触发触发器，但我不知道该怎么做:(你找到解决方案了吗？

这个时候还是不行。它返回的日期似乎基于您调用该函数的时间。

是的，您必须自己计算。您可以将某些内容传递给 userInfo 字典来计算它。这是迄今为止我见过的最愚蠢的 api。返回当前日期和时间间隔有什么帮助？