Question

我试图设置闹钟，但我想要而不是播放音乐该应用程序将读取我创建的待办事项列表。

我正在使用AVSpeechSynthesizer类来执行语音功能而且工作正常但问题是，我使用Timer来安排任务，当应用程序进入后台时，计时器停止工作

这是我的代码：

class Speaking : NSObject,AVSpeechSynthesizerDelegate {

let speechSynthesizerObject = AVSpeechSynthesizer()
let voice = AVSpeechSynthesisVoice(language: "en-au")

override init() {
    super.init()
    speechSynthesizerObject.delegate = self
}

func speak(string: String) {
    let utterance = AVSpeechUtterance(string: string)
    utterance.rate = 0.5
    utterance.voice = self.voice
    speechSynthesizerObject.speak(utterance)
}

func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {
    print("all done")

}    
}

闹钟功能

func setAlaram(){

    var date = self.appData.Alaram

    if(date < Date()){
        date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
    }

    let calendar = Calendar(identifier: .gregorian)

    var component = calendar.dateComponents([.year,.month,.day,.hour,.minute,.second], from: date)
    component.second = 0
    var modifiedDateTime = calendar.date(from: component)!

   var snooz = Timer(fireAt: modifiedDateTime, interval: 0, target: self, selector: #selector(setSpeechRecognizeAsAlaram), userInfo: "first", repeats: false)
    RunLoop.main.add(snooz!, forMode: RunLoopMode.commonModes)
 }

我希望在时间崩溃时触发的功能

 func setSpeechRecognizeAsAlaram( sender: Timer){
    guard let data = loadAppData() else{ return }
    self.appData = data

    let numberOfTodo = String(appData.ToDoList.count)


    var items = String()
    var counter = 1
    for item in appData.ToDoList {
        items += String(counter) + ", " + item + ". "
        counter += 1
    }

    let date = Date()
    let dateformat1 = DateFormatter()
    let dateformat2 = DateFormatter()
    dateformat1.dateStyle = .full
    dateformat2.dateFormat = "hh:mm a"
    var sentence = String()

    if(appData.ToDoList.count == 0){
        sentence = " Good Morning! It’s" + dateformat2.string(from: date) + "!. And it’s time to wake up!. I’m disappointed in you today. You forgot to add in new “TO-DO” items to your list."
    }
    else{
        sentence = "Good Morning! Its " + dateformat2.string(from: date) + "!. And its time to wake up. Today is " + dateformat1.string(from: date) + ". You have " + numberOfTodo + " items on your to-do list for the day. " + items + " Thats all!. I hope you have a productive day! "
    }
  let spk = Speaking()
    spk.speak(string: sentence)

}

任何帮助将不胜感激

谢谢

Answer 1

您是否阅读过Background Execution，Apples注意到如何在后台运行任务。

在后台获取用户注意权的部分。有一个使用本地通知设置闹钟的示例。

来自Apple的网站

清单3-2 安排警报通知

- (void)scheduleAlarmForDate:(NSDate*)theDate { UIApplication* app = [UIApplication sharedApplication]; NSArray* oldNotifications = [app scheduledLocalNotifications]; // Clear out the old notification before scheduling a new one. if ([oldNotifications count] > 0) [app cancelAllLocalNotifications]; // Create a new notification. UILocalNotification* alarm = [[UILocalNotification alloc] init]; if (alarm) { alarm.fireDate = theDate; alarm.timeZone = [NSTimeZone defaultTimeZone]; alarm.repeatInterval = 0; alarm.soundName = @"alarmsound.caf"; alarm.alertBody = @"Time to wake up!"; [app scheduleLocalNotification:alarm]; } }

<击>

<强> 更新

当然，UILocalNotification已被弃用。新的替代品为UNNotificationRequest。

如何在swift中安排任务？

1 个答案: