我想一直运行服务，即使应用在Swift IOS中被关闭，杀死或终止 [英] I want to Run a Service all the time Even App is closed,killed or terminated in Swift IOS

问题描述

这是我要一直运行的示例代码服务

Here is sample code service that i want to run all the time

internal func backService()
    {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), { () -> Void in
            let anObject = try! Realm().objects(remindertbl).filter("status = 0")
            print("here")
            for loop in anObject
            {
                let dateFormatter = NSDateFormatter()
                dateFormatter.dateFormat = "dd/MM/yyyy hh:mm a"
                let  timestamp = dateFormatter.stringFromDate(NSDate())
                let timeStampint = dateFormatter.dateFromString(timestamp)!.timeIntervalSince1970
                if(loop.reminderdays == Int64(timeStampint))
                {
                    if(loop.status == 0){                            

                    let notification = UILocalNotification()
                    notification.fireDate = NSDate(timeIntervalSince1970: 0)
                    notification.alertBody = "\(loop.title)"
                    notification.alertAction = "swipe to opem VLB Cloud!"
                    notification.soundName = UILocalNotificationDefaultSoundName
                    notification.userInfo = ["CustomField1": "w00t"]
                    UIApplication.sharedApplication().scheduleLocalNotification(notification)

                    let updateObject = try! Realm().objects(remindertbl).filter("status = 0")
                    var reminderObject = remindertbl()
                    for updateStatus in updateObject{
                        try! Realm().write()
                            {
                                print("target")
                                reminderObject.status = 2
                                reminderObject.reminderId = updateStatus.reminderId
                                reminderObject.syncflag = updateStatus.syncflag
                                reminderObject.vehicleid = updateStatus.vehicleid
                                reminderObject.syncid = updateStatus.syncid
                                reminderObject.dateadded = updateStatus.dateadded
                                reminderObject.datemodified = Int64(Timestamp)!
                                reminderObject.remindertime = updateStatus.remindertime
                                reminderObject.reminerDate = updateStatus.reminerDate
                                reminderObject.reminderdays = updateStatus.reminderdays
                                reminderObject.title = updateStatus.title
                                reminderObject.targetdistance = updateStatus.targetdistance
                                reminderObject.currentdistance = updateStatus.currentdistance
                                reminderObject.remindertype = updateStatus.remindertype

                                reminderObject.synctype = updateStatus.synctype
                                reminderObject.recuringdays = updateStatus.recuringdays
                                reminderObject.recuringdistance = updateStatus.recuringdistance

                                try! Realm().add(reminderObject, update: true)
                                reminderObject = remindertbl()
                        }
                    }
                }
            }
        }

    })
}

推荐答案

由于多种原因，您无法提出要求:

What you are asking is not possible for multiple reasons:

1. 已被终止或终止的任务/应用无法定义 运行一些代码
2. Apple在iOS上厌恶了一些背景模式 设备，如果您不是诸如voIP之类的特定任务，则您的应用程序不会 被操作系统授权随时运行

1. A task/app that has been killed or terminated cannot by definition run some code
2. A few background modes are atuhorized by Apple on iOS devices, if you are not specific task such as voIP, your app won't be authorized to run at all times by the OS

如果您想了解有关在iOS上后台执行某些任务的更多信息，建议您阅读官方文档:

If you want to learn more about executing some tasks on the background on iOS, I suggest you read the official documentation: Apple Documentation or this tutorial by the Ray Wenderlich team: Background modes for iOS

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