UNTimeIntervalNotificationTrigger nextTriggerDate（）是否给出错误的日期？

Question

我正在更新我的本地通知以与iOS 10一起工作，并且遇到了一个问题，我认为nextTrigger函数返回NOT“触发条件满足的下一个日期”，而是返回当前日期时间是PLUS你最初设置的UNTimeInvervalNotificationTrigger。

因此，如果您设置触发器在60秒内关闭，从文档中我期望当我调用nextTriggerDate（）时，我会让它返回任何日期时间，当我设置触发器+ 60秒。所以如果我在12:00:00设置它，我期望nextTriggerDate（）将是12:01:00。然而我所经历的是，无论当前日期是+ 60秒，它都会返回。

我写了一个示例，它计划一个UNTimeIntervalNotificationTrigger，然后每秒钟打印出nextTriggerDate（）。当我运行这个时，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) 

我已经用苹果打开了一个TSI，但是......你知道......需要一段时间。所以我想我会看看这里有没有人有任何见解。我怀疑这是一个错误，如果我得到更多的信息，我会更新这个。

这是我用来说明问题的代码：

进口的UIKit 进口UserNotifications

类的ViewController：UIViewController中，UIPickerViewDelegate，UIPickerViewDataSource { @IBOutlet弱变种SET按钮：UIButton的！

@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)") 

     } 
    }) 
} 

}

Answer 1

从苹果DTS收到回复，被告知，我想描述的功能是它是如何设计的工作。尽管我曾经认为文档中有不同的解释，但他们告诉我说：“鉴于实施情况，文档是乐观的。”无论如何，我通过跟踪代码中的火灾日期来解决这个问题。我希望这个答案可以帮助其他有我同样问题的人。