ios - 无法在 Swift 2.0 中为 MKDirectionsRequest 设置源和目标

Question

在 Swift 2.0 中尝试使用 MKDrectionsRequest 时，出现错误:

'Value of type 'MKDirectionsRequest' as no member 'setSource'

我的代码是这样的:

let myRouteRequest = MKDirectionsRequest()
myrouteRequest.transportType = .Automobile
myRouteRequest.setSource(MKMapItem.mapItemForCurrentLocation())
myRouteRequest.setDestination(MKMapItem(myPlacemark))

仅供引用:我什至不需要实际的路线，只需要估计的行驶时间和距离，所以如果有其他方法，请告诉我。谢谢。

Answer 1

您需要将这些值分配给 MKDirectionsRequest 的 source 属性:

myRouteRequest.source = MKMapItem.mapItemForCurrentLocation()

同样适用于destination:

myRouteRequest.destination = MKMapItem(placemark: myPlacemark)

另外，你这里有错别字:

myrouteRequest.transportType = .Automobile

应该是这样的:

myRouteRequest.transportType = .Automobile 
//Capital "R" is probably what you wanted to mean.

关于获取估计的行程时间和距离:

我们需要先创建一个路线请求:

let directions = MKDirections(request: myRouteRequest)

directions.calculateDirectionsWithCompletionHandler
{
    (response, error) -> Void in

    if let routes = response?.routes where response?.routes.count > 0 && error == nil
    {
        let route : MKRoute = routes[0]

        //distance calculated from the request
        print(route.distance) 

        //travel time calculated from the request
        print(route.expectedTravelTime)
    }
}