为啥只有我最后一个本地通知功能被调用？

Posted 2023-03-14

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【中文标题】为啥只有我最后一个本地通知功能被调用？【英文标题】：Why only my last local notification function is getting called?为什么只有我最后一个本地通知功能被调用？ 【发布时间】：2017-03-12 02:06:21 【问题描述】：

我对 swift 还很陌生，我试图在 UISwitch IBAction 中调用多个请求本地通知的函数。我想在某个日期发送通知 - 一年中的每个季度的第 4、7、10、1 个月。只有第四季度的函数被调用。我怎样才能让所有四个函数都被调用？这是我的代码：

// 用于季度通知的 UISwitch

@IBAction func quarterlyFrequencyTapped(_ sender: UISwitch) 

if quarterlyFrequency.isOn == true 

    firstQuarter(); secondQuarter(); thirdQuarter(); fourthQuarter()

    print("quarterly frequency is \(quarterlyFrequency.isOn)")

 else 

    removeQuarterlyNotification()

    print("quaterly frequency is \(monthlyFrequency.isOn)")

// 所有四个季度的函数

func firstQuarter() 
    let firstQuarterContent = UNMutableNotificationContent()
    firstQuarterContent.title = "First Quarter"
    firstQuarterContent.subtitle = "Some string"
    firstQuarterContent.body = "Some other string"

    var firstQuarterDate = DateComponents()
    firstQuarterDate.month = 3
    firstQuarterDate.day = 11
    firstQuarterDate.hour = 19
    firstQuarterDate.minute = 20

    let firstQuarterTrigger = UNCalendarNotificationTrigger(dateMatching: firstQuarterDate, repeats: true)
    let firstQuarterRequestIdentifier = "Quarterly"
    let firstQuarterRequest = UNNotificationRequest(identifier: firstQuarterRequestIdentifier, content: firstQuarterContent, trigger: firstQuarterTrigger)
    UNUserNotificationCenter.current().add(firstQuarterRequest, withCompletionHandler: nil)


func secondQuarter() 
    let secondQuarterContent = UNMutableNotificationContent()
    secondQuarterContent.title = "Second Quarter"
    secondQuarterContent.subtitle = "Some string"
    secondQuarterContent.body = "Some other string"

    var secondQuarterDate = DateComponents()
    secondQuarterDate.month = 3
    secondQuarterDate.day = 11
    secondQuarterDate.hour = 19
    secondQuarterDate.minute = 21

    let secondQuarterTrigger = UNCalendarNotificationTrigger(dateMatching: secondQuarterDate, repeats: true)
    let secondQuarterRequestIdentifier = "Quarterly"
    let secondQuarterRequest = UNNotificationRequest(identifier: secondQuarterRequestIdentifier, content: secondQuarterContent, trigger: secondQuarterTrigger)
    UNUserNotificationCenter.current().add(secondQuarterRequest, withCompletionHandler: nil)


func thirdQuarter() 
    let thirdQuarterContent = UNMutableNotificationContent()
    thirdQuarterContent.title = "Third Quarter"
    thirdQuarterContent.subtitle = "Some string"
    thirdQuarterContent.body = "Some other string"

    var thirdQuarterDate = DateComponents()
    thirdQuarterDate.month = 3
    thirdQuarterDate.day = 11
    thirdQuarterDate.hour = 19
    thirdQuarterDate.minute = 22

    let thirdQuarterTrigger = UNCalendarNotificationTrigger(dateMatching: thirdQuarterDate, repeats: true)
    let thirdQuarterRequestIdentifier = "Quarterly"
    let thirdQuarterRequest = UNNotificationRequest(identifier: thirdQuarterRequestIdentifier, content: thirdQuarterContent, trigger: thirdQuarterTrigger)
    UNUserNotificationCenter.current().add(thirdQuarterRequest, withCompletionHandler: nil)


func fourthQuarter() 
    let fourthQuarterContent = UNMutableNotificationContent()
    fourthQuarterContent.title = "Fourth Quarter"
    fourthQuarterContent.subtitle = "Some string"
    fourthQuarterContent.body = "Some other string"

    var fourthQuarterDate = DateComponents()
    fourthQuarterDate.month = 3
    fourthQuarterDate.day = 11
    fourthQuarterDate.hour = 19
    fourthQuarterDate.minute = 23

    let fourthQuarterTrigger = UNCalendarNotificationTrigger(dateMatching: fourthQuarterDate, repeats: true)
    //let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
    let fourthQuarterRequestIdentifier = "Quarterly"
    let fourthQuarterRequest = UNNotificationRequest(identifier: fourthQuarterRequestIdentifier, content: fourthQuarterContent, trigger: fourthQuarterTrigger)
    UNUserNotificationCenter.current().add(fourthQuarterRequest, withCompletionHandler: nil)

【问题讨论】：

你怎么知道只有第四个被调用？这段代码没有任何问题。这个firstQuarter(); secondQuarter(); thirdQuarter(); fourthQuarter() 执行所有 4...没有错。也许您的函数本身工作不正确为了测试这一点，我将每个季度的函数设置为相隔一分钟并运行模拟器。只有第四个通知在模拟器中运行。没有。使用该行代码调用所有 4 个函数。你还有其他问题。 【参考方案1】：

我认为您使用的是 +ios10 并且您正在使用 UserNotifications 框架，对吗？

很可能您的identifiers 具有相同，并且每个都更新之前的通知。

identifier 存在的原因是为了帮助您更新具有相同标识符的先前通知。例如，您发送通知将分数从0-0 更新为0-1。而不是在屏幕上显示 2 个通知，您现在只有一个。

您的解决方法是为每个标识符使用不同标识符。

有关更多信息，请参阅moment 的 WWDC 视频

修改后更新： 就像我说的...您的所有通知都以"Quarterly" 作为其标识符。给他们一个单独的名字。

【讨论】：

@nsd32 因为你是新来的。一旦你得到你喜欢的答案，建议 1. 点赞 2. 点击勾选mark it as accepted answer 感谢您的提示。我只是单击了复选标记，但是由于我的声誉仍然很低，因此没有显示赞成票，但显然它仍然被记录在某个地方。再次感谢所有帮助。【参考方案2】：

一点帮助

您可以添加 UUID().uuidString 作为标识符。

感谢亲爱的

【讨论】：