Swift 3:如何在Google地图中删除跟踪的折线 [英] Swift 3: How to remove the tracked polyline in Google map

问题描述

我已经画出了折线，但是我并不是没有什么编码可以删除Google地图中的追踪折线. 我在下面尝试一些编码.

I have draw the polylines, but I don't no that what coding can remove the tracked polyline in the google map. I'm trying some coding in below.

这是行不通的.

var polyline = GMSPolyline()
   polyline.map = nil 

---

这可以删除跟踪的折线，但是当我创建了标记并点按它时，标记无法播种信息窗口.

---

this is working to remove tracked polyline, but when I'm maked the markers and tap it, marker can not sow the info window.

mapView.clear()

谢谢

推荐答案

解决方案:

1. 创建折线:通过GoogleMapsAPIs教学折线
2. 创建变量oldPolylineArr/oldPolyline类型GMSPolyline/GMSPolyline_Array
3. 将折线存储到oldPolyline
4. 删除折线

1. create polyline: teaching polyline by GoogleMapsAPIs
2. create variable oldPolylineArr/oldPolyline type GMSPolyline/GMSPolyline_Array
3. store the polyline to the oldPolyline
4. remove the polyline

样本编码:

//Step 1:
var mapView = GMSMapView()
let path = GMSMutablePath()
path.add(CLLocationCoordinate2D(latitude: 37.36, longitude: -122.0))
path.add(CLLocationCoordinate2D(latitude: 37.45, longitude: -122.0))
path.add(CLLocationCoordinate2D(latitude: 37.45, longitude: -122.2))
path.add(CLLocationCoordinate2D(latitude: 37.36, longitude: -122.2))
path.add(CLLocationCoordinate2D(latitude: 37.36, longitude: -122.0))
let rectangle = GMSPolyline(path: path)

//Step 2:
var oldPolylineArr = [GMSPolyline]()

数组

//Step 3:
oldPolyline.append(rectangle)

//Step 4:
for p in (0 ..< oldPolylineArr.count) {
    oldPolylineArr[p].map = nil
}

不是数组

//Step 3:
oldPolyline = polyline

//Step 4:
oldPolyline.map = nil

这篇关于Swift 3:如何在Google地图中删除跟踪的折线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！