Swift - 如何将自定义字段添加到Google Maps SDK中的标记中？

问题描述

我尝试使用地图构建应用程序，并且我想在标记中添加其他信息。文档仅提供2个属性 title 和 snippet 。它看起来像这样

  let position = CLLocationCoordinate2DMake（51.5，-0.127）
 let london = GMSMarker（position：position ）
 london.title =伦敦
 london.snippet =人口：8,174,100
 london.map = mapView 
  以显示地点的平均评分。 
 
 
 
我该怎么做？  
解决方案
 Google Maps SDK包括标记对象上的 userData 字段，请参阅。使用你的例子，这就是分配数据的样子。 p> 
 
 
  let mCustomData = customData（starRating：10）//初始值为10 
 
 let position = CLLocationCoordinate2DMake（51.5，-0.127）
 let london = GMSMarker（position：position）
 london.title =London
 london.snippet =人口：8,174,100
伦敦。 userData = mCustomData 
 london.map = mapView 
  
  customData 
 
 
 
  class customData {
 var starRating：Int 
 init（星级评分：Int ）{
 starRating =评分
} 
} 
  
您的用户数据只是从标记对象中检索它。
  let mRating =（london.userData as！ customData）.starRating 
  
 
I try to build app with maps, and I want to have additional info in markers. Documentation offers only 2 properties title and snippet. It looks like this
let position = CLLocationCoordinate2DMake(51.5, -0.127)
let london = GMSMarker(position: position)
london.title = "London"
london.snippet = "Population: 8,174,100"
london.map = mapView
For example, I want to add field rating to each marker to display average rating for place. 
How can I do that ?
 解决方案 
The Google Maps SDK includes a userData field on the marker object, see link.
Using your example this is what it would look like the following to assign the data.
let mCustomData = customData(starRating: 10)  // init with a rating of 10

let position = CLLocationCoordinate2DMake(51.5, -0.127)
let london = GMSMarker(position: position)
london.title = "London"
london.snippet = "Population: 8,174,100"
london.userData = mCustomData
london.map = mapView
And the customData class something like this.
class customData{
    var starRating: Int
    init(starRating rating: Int) {
        starRating = rating
    }
}
To access the your user data just retrieve it from the marker object.
let mRating = (london.userData as! customData).starRating
                        
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