使用Google iOS SDK创建多个标记

我是斯威夫特的新手。 我在谷歌地图上得到2个标记：

import UIKit import GoogleMaps class ViewController: UIViewController { // You don't need to modify the default init(nibName:bundle:) method. override func loadView() { let camera = GMSCameraPosition.cameraWithLatitude(37.0902, longitude: -95.7129, zoom: 3.0) let mapView = GMSMapView.mapWithFrame(CGRect.zero, camera: camera) mapView.myLocationEnabled = true view = mapView let state_marker = GMSMarker() state_marker.position = CLLocationCoordinate2D(latitude: 61.370716, longitude: -152.404419) state_marker.title = "Alaska" state_marker.snippet = "Hey, this is Alaska" state_marker.map = mapView let state_marker1 = GMSMarker() state_marker1.position = CLLocationCoordinate2D(latitude: 32.806671, longitude: -86.791130) state_marker1.title = "Alabama" state_marker1.snippet = "Hey, this is Alabama" state_marker1.map = mapView } } 

我需要为不同的纬度和经度添加51个标记，以用于具有不同标题和片段的每个州。

我可以只复制这个块51次但有没有办法优化这段代码？

Answer 1

您应该创建一个这样的结构：

 struct State { let name: String let long: CLLocationDegrees let lat: CLLocationDegrees } 

然后在VC中创建此结构的数组：

 let states = [ State(name: "Alaska", long: -152.404419, lat: 61.370716), State(name: "Alabama", long: -86.791130, lat: 32.806671), // the other 51 states here... ] 

现在您可以循环遍历数组，在每次迭代中添加标记：

 for state in states { let state_marker = GMSMarker() state_marker.position = CLLocationCoordinate2D(latitude: state.lat, longitude: state.long) state_marker.title = state.name state_marker.snippet = "Hey, this is \(state.name)" state_marker.map = mapView } 

您可能还需要添加一个字典，该字典将状态名称存储为键，并将相应的GMSMarker为值。 这样，您可以稍后修改标记。

 var markerDict: [String: GMSMarker] = [:] override func loadView() { for state in states { let state_marker = GMSMarker() state_marker.position = CLLocationCoordinate2D(latitude: state.lat, longitude: state.long) state_marker.title = state.name state_marker.snippet = "Hey, this is \(state.name)" state_marker.map = mapView markerDict[state.name] = state_marker } }