当将多个标记放入调度队列时，列表中有多个标记时，带有多个标记的映射只显示一个标记

Question

我有一个lat-lon数组，我试图用标记放所有的lat-long，只有一个标记出现在地图上。请帮助

for item in json {
//print(item["price"])
if let vendor = item["vendor"] as? [String:Any],
let lat = vendor["latitude"] as? Double,
let lon = vendor["longitude"] as? Double,
let termsandcondi = item["termsAndConditions"] as? String,
let pre = item["price"] as? Int ,
let name = item["name"] as? String, !name.isEmpty {
//print(termsandcondi)
//print(pre)
self.locationManager.delegate = self
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
let data = ["name":name,"latitude":lat,"longitude":lon,"termsAndConditions":termsandcondi,"price":pre] as! [String : AnyObject]
//print("getting here")
self.myArray.append(data)
DispatchQueue.main.async {
print("Coming here !! Dispatch Queue")
let camera = GMSCameraPosition.camera(withLatitude:12.9716, longitude:77.5946, zoom: 10.0)
let subView = GMSMapView.map(withFrame: CGRect(x: 0, y: 0, width: self.mapView.frame.size.width, height: self.mapView.frame.size.height), camera: camera)
self.nameDeal.text = name as String?
self.pric.text = String(describing: pre)
let marker = GMSMarker()
marker.position = CLLocationCoordinate2D(latitude:lat, longitude:lon)
marker.title = name
marker.map = self.mapView
//marker.map = self.mapView
}

Answer 1

此方法将使您在地图上发布多个引脚。把这个放在一个方法中使用函数准备映射((｛

//Filtered data is in array of key values that contains lat long
guard let _filteredData = filteredData else { return }
//Converting lat long to double
var latitude = filteredData?.first?.lATITUDE
var  longitude = filteredData?.first?.lONGITUDE

for pins in _filteredData{
let position = CLLocationCoordinate2D(latitude: CLLocationDegrees(Float(latitude)), longitude: CLLocationDegrees(Float(longitude)))
let marker = GMSMarker(position: position)
marker.icon = UIImage(named: "map-location-pin")
marker.map = self.mapView
marker.userData = pins.iD
}
}