快速位置：每 X 米触发一次通知答案

【问题标题】：Swift Locations: Fire every X Meters a Notification快速位置：每 X 米触发一次通知
【发布时间】：2016-11-07 13:25:01
【问题描述】：

我希望你们能帮助我，因为我的大脑因思考而燃烧：D。我想通知用户，例如每 100 米。但我不想更改位置服务的刷新。有一个简单的方法，但我不喜欢它。我认为有更好的解决方案。到目前为止我所做的（那是伪代码！）这在 didUpdateLocation 中调用

 //We want notify User but only 5 times during the movement
        if distanceToReport < settedDistance {
            //Store that first Notification is fired
            if !firstNotificationFired {
                self.notifyUser(report: report)

            }
            if firstNotificationFired && distanceToReport <= 400 {
                //Store that second Notification is fired
                self.notifyUser(report: report)
            } else if secondNotificationFired && distanceToReport <= 300 {
                //Store that third Notification is fired
            } else if thirdNotificationFired && distanceToReport <= 200 {
                //Store that fourth Notification is fired
            } else if fourthNotifiationFired && distanceToReport <= 100 {
                //Store that fifth Notification is fired
            }


        }

还有比这更好更有效的方法吗？或者有什么数学或算法可以提供帮助？

到目前为止谢谢。

【问题讨论】：

标签： ios swift notifications location cllocationmanager

【解决方案1】：

清理代码的一种方法是将距离放入变量中并在每次通知时递增，应该减少 if 语句。

if notificationShouldFire && distanceToReport <= targetDistance {
   self.notifyUser(report: report)
   targetDistance += targetDistance + 100
   notificationShouldFire = true
   // could also use count variable rather than a variable for each notif.
   firedNotifications += firedNotifications + 1
}

// your if statement would change slightly
if firedNotifications <= 5 && distanceToReport <= targetDistance {
   // increment and notify here
}

如果你愿意，我认为你可以稍微提高效率，但你所拥有的并不是世界末日。

【讨论】：