CLLocation速度返回-1.0 [英] CLLocation speed return -1.0

问题描述

我有问题.我的GPS(在Wifi上的iPad mini 2和3G/4G上的iPhone 6)上，速度返回-1.0.有一个主意吗?这是我在控制台日志中收到的:

I have problem. My GPS (on iPad mini 2 in Wifi and on iPhone 6 in 3G/4G) the speed return -1.0. Have an idea? This what i receive in console log:

长:12.5245，纬度:41.9456，速度:-1.0，kph:-3.6

Long: 12.5245, Lat: 41.9456, Speed:-1.0, kph: -3.6

这是 didUpdateLocations()

    let userLocation: CLLocation = locations[0]
    var speed: CLLocationSpeed = CLLocationSpeed()
    speed = (locationManager.location?.speed)!

    SpeedLabel.text = String(format: "%.0f km/h", speed * 3.6)
    let long = String(Float(userLocation.coordinate.longitude))
    let lat = String(Float(userLocation.coordinate.latitude))


    print("Long: \(long), Lat: \(lat), Speed:\(speed), kph: \(speed * 3.6) ")

推荐答案

我也遇到了这个问题.负值表示无效速度.大多数情况下，这是当您在建筑物内时发生的，并且由于建筑物的缘故，您的位置经常移动很多.

I had this problem too. A negative value means an invalid speed. This is most of the time occured when you're inside a building and your location is moving a lot due to the building.

一个简单的解决方法是:

A simple fix would be:

if speed < 0 { 
    speed = 0 
}

这将检查速度是否为负.如果是，它将重置为0.

This checks if the speed is negative. If it is, it'll reset it to 0.

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