iOS 本地通知的日期、时间范围和次数？

Question

在 Whosebug 和其他网站上进行了大量研究之后，我能找到的唯一选项是在一周中的特定日期和特定时间重复通知，使用：

dateComponents = DateComponents()  
dateComponents.calendar = Calendar.current  
dateComponents.hour = hour  
dateComponents.minute = minute  
dateComponents.weekday = 1  // Sunday  


let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)

// 以上会在我设置的每个星期天的任何时间触发。

发送通知的另一个选项是设置时间间隔但选项不多。

let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 30, repeats: true)

我找不到任何触发通知的建议或解决方案（特定日期特定时间开始的次数）。例如：我想在每周日早上 8 点到下午 5 点之间触发 5 个本地通知。

有什么建议吗？提前谢谢你。

Answer 1

您需要创建自己的时间或日期；编程并不聪明，只是随心所欲。编码是一门精确的科学，需要这样对待。

var days = [2, 3, 4, 5, 6]
var hours = [10, 11, 12, 13, 14]
var minute = 0
for day in days {
    for hour in hours {
        dateComponents = DateComponents()

        dateComponents.calendar = Calendar.current

        dateComponents.hour = hour

        dateComponents.minute = minute

        dateComponents.weekday = 2

        let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
    }
}

这应该创建一系列触发器，这些触发器将在 10 11 12 13 14 小时的整点交付2 3 4 5 6 的日子。用人类的话说，假设我正确关联了这些数字，它应该在 M-F 的整点从 10-2 开始每小时触发一次你的用户。

Tbh - 从未使用过 UNCalenderNotificationTrigger，但假设它按照您所说的那样工作，这将为每个时间创建触发器。

Answer 2

如果你想安排多个通知，你需要创建多个通知触发器并注册它们。

类似于：

// Simple extension if you have to create multiple of the same object
extension DateComponents {
   static func triggerFor(hour: Int, minute: Int) -> DateComponents {
      var component = DateComponents()
      component.calendar = Calendar.current
      component.hour = hour
      component.minute = minute
      component.weekday = 1
      return component
   }
}

// Add each trigger into an array with the correct date component
let triggers = [
    UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 1, minute: 0), repeats: true),
    UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 2, minute: 0), repeats: true),
    UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 3, minute: 0), repeats: true),
    UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 4, minute: 0), repeats: true),
    UNCalendarNotificationTrigger(dateMatching: DateComponents.triggerFor(hour: 5, minute: 0), repeats: true)
]

// Iterate through the array and register the notification with the system
for trigger in triggers {
    // Create the content of the notification
    let content = UNMutableNotificationContent()
    content.title = "My Notification Title"
    content.body = "Body of Notification"

    // Create the request
    let uuidString = UUID().uuidString
    let request = UNNotificationRequest(identifier: uuidString, 
                content: content, trigger: trigger)

    // Schedule the request with the system.
    let notificationCenter = UNUserNotificationCenter.current()
    notificationCenter.add(request) { (error) in
       if error != nil {
          // Handle any errors.
       }
    }
}

iOS 本地通知的日期、时间范围和次数？

iOS local notification base on day, time frame and number of times?

notifications

ios

swift