多次发送多个通知 (Swift)

Posted 2023-02-23

【中文标题】多次发送多个通知 (Swift)

【英文标题】：Send Multiple Notifications at Multiple Times (Swift)

【发布时间】：2018-05-30 17:53:24

【问题描述】：

我有一个时间选择器和一个文本字段，用户可以在其中输入时间和标题，我想在用户选择的时间发送本地通知。我的代码可以发送一个通知，但是如果我添加另一个通知，它会覆盖第一个通知，并且不会发送第一个通知。我认为这可能是因为标识符，但不知道如何解决。

这是我的代码：

let calendar = Calendar.current

let datec = Date()

let hour = Calendar.current.component(.hour, from: StartTimePicker.date)
let minute = Calendar.current.component(.minute, from: StartTimePicker.date)

let year = calendar.component(.year, from: datec)
let month = calendar.component(.month, from: datec)
let day = calendar.component(.day, from: datec)


let components = DateComponents(year: year, month: month, day: day, hour: hour, minute: minute) // Set the date here when you want Notification
let date = calendar.date(from: components)
let comp2 = calendar.dateComponents([.year,.month,.day,.hour,.minute], from: date!)
let trigger = UNCalendarNotificationTrigger(dateMatching: comp2, repeats: true)

let content = UNMutableNotificationContent()
content.title = "Schedule Alert"
content.body = TitleTextField.text! + " from " + time

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

UNUserNotificationCenter.current().add(request, withCompletionHandler:  error in
    if error != nil 
        //handle error
     else 
        //notification set up successfully
    

【问题讨论】：

如果您希望通知是唯一的，请为每个通知创建一个唯一标识符

【参考方案1】：

如果您想安排每日通知？试试这样的

    let content = UNMutableNotificationContent.init()
    content.title = "Schedule Alert"
    content.body = TitleTextField.text!

    // Add a sound and a badge
    content.sound = UNNotificationSound.default()
    content.badge = 1

    // Create a unique identifier
    let identifier = UUID.init().uuidString

    // Date components for daily notifications
    var dateComponents = Calendar.current.dateComponents([.hour, .minute], from: StartTimePicker.date)
    dateComponents.second = 0

    let trigger = UNCalendarNotificationTrigger.init(dateMatching: dateComponents, repeats: true)
    let request = UNNotificationRequest.init(identifier: identifier, content: content, trigger: trigger)

    let center = UNUserNotificationCenter.current()
    center.add(request)  (error) in
        if error != nil 
            print("Failed")
         else 
            print("Success")