您好我写了这段代码在某点之间绘制折线:
var arrayToDraw: Array<Any> = []
var forpolyline: Array<CLLocationDegrees> = []
var forpolyline2: CLLocationCoordinate2D = CLLocationCoordinate2D.init()
func showRoute() {
for h in 0...(orderFinalDictionary.count - 1){
arrayToDraw = orderFinalDictionary[h].value
print(arrayToDraw)
var arrayToDrawCount = arrayToDraw.count
for n in 0...(arrayToDrawCount - 1){
forpolyline = (arrayToDraw[n] as! Array<CLLocationDegrees>)
forpolyline2.latitude = (forpolyline[0])
forpolyline2.longitude = (forpolyline[1])
print(forpolyline2)
var geodesic = MKPolyline(coordinates: &forpolyline2, count: 1)
self.mapView.add(geodesic)
}
}
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let renderer = MKPolylineRenderer(polyline: overlay as! MKPolyline)
renderer.strokeColor = UIColor.red
renderer.lineWidth = 3
return renderer
}
它从一个Dictionary中获取坐标,将它放在一个数组(arraToDraw)中,然后使用forpolyline和forpolyline2来转换值。
现在问题是它只在坐标上绘制点我该怎么连接?
答案 0 :(得分:1)
您使用单个点创建多条折线,而不是使用多个点创建单个折线。在不知道你的字典结构的情况下很难得到正确的代码,但这应该更符合你想要做的事情:
var arrayToDraw: Array<Any> = []
var forpolyline: Array<CLLocationDegrees> = []
var forpolyline2: CLLocationCoordinate2D = [CLLocationCoordinate2D]()
func showRoute() {
for h in 0...(orderFinalDictionary.count - 1){
arrayToDraw = orderFinalDictionary[h].value
print(arrayToDraw)
var arrayToDrawCount = arrayToDraw.count
for n in 0...(arrayToDrawCount - 1){
forpolyline = (arrayToDraw[n] as! Array<CLLocationDegrees>)
forpolyline2.append(CLLocationCoordinate2D(latitude: forpolyline[0], longitude: forpolyline[1]))
}
print(forpolyline2)
let geodesic = MKPolyline(coordinates: &forpolyline2, count: forpolyline2.count)
self.mapView.add(geodesic)
}
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let renderer = MKPolylineRenderer(polyline: overlay as! MKPolyline)
renderer.strokeColor = UIColor.red
renderer.lineWidth = 3
return renderer
}