我的 map 中有近 8000 个注释,我想根据用户在应用程序中进行的缩放对它们进行分组。
所有的纬度和经度都已经作为 Double 进入了 CoreData。
如果我在同一个点有两个不同的注释图像,我想显示两组,一组带有十字,一组带有心脏。
当用户点击注释时,如果该注释是分组注释,我想向用户显示该位置有多少注释,“强制”用户放大以单独查看注释。
下面是我的应用程序的图像和当前注释。
谢谢!
最佳答案
我已经知道了。
var zoomLevel = Double()
var iphoneScaleFactorLatitude = Double()
var iphoneScaleFactorLongitude = Double()
var CanUpdateMap: Bool = false
static func getLatitudeLongitudeLimitsFromMap(mapView: MKMapView) -> [String: Double] {
var coord = [String: Double]()
let MinLat: Double = mapView.region.center.latitude - (mapView.region.span.latitudeDelta / 2)
let MaxLat: Double = mapView.region.center.latitude + (mapView.region.span.latitudeDelta / 2)
let MinLon: Double = mapView.region.center.longitude - (mapView.region.span.longitudeDelta / 2)
let MaxLon: Double = mapView.region.center.longitude + (mapView.region.span.longitudeDelta / 2)
coord["MinLat"] = MinLat
coord["MaxLat"] = MaxLat
coord["MinLon"] = MinLon
coord["MaxLon"] = MaxLon
return coord
}
func LoadMap(mapView: MKMapView) {
// Get the limits after move or resize the map
let coord: [String: Double] = getLatitudeLongitudeLimitsFromMap(mapView)
let MinLat: Double = coord["MinLat"]! as Double
let MaxLat: Double = coord["MaxLat"]! as Double
let MinLon: Double = coord["MinLon"]! as Double
let MaxLon: Double = coord["MaxLon"]! as Double
var arrAnnotations = [MKAnnotation]()
let FilterMinLat = arrDicListPinsWithLatitudeLongitude.filter({
if let item = $0["Latitude"] as? Double {
return item > MinLat
} else {
return false
}
})
let FilterMaxLat = FilterMinLat.filter({
if let item = $0["Latitude"] as? Double {
return item < MaxLat
} else {
return false
}
})
let FilterMinLon = FilterMaxLat.filter({
if let item = $0["Longitude"] as? Double {
return item > MinLon
} else {
return false
}
})
let FilterMaxLon = FilterMinLon.filter({
if let item = $0["Longitude"] as? Double {
return item < MaxLon
} else {
return false
}
})
for Item in FilterMaxLon {
let dic:[String:AnyObject] = Item
var Name = String()
var Address = String()
var IconPNG = String()
if let Latitude = dic["Latitude"] as? Double {
if let Longitude = dic["Longitude"] as? Double {
if let item = dic["Name"] {
Name = item as! String
}
if let item = dic["Address"] {
Address = item as! String
}
if let item = dic["TypeID"] as? Int {
if item == 11 {
IconPNG = "icon-cross.png"
} else {
IconPNG = "icon-heart.png"
}
}
arrAnnotations.append(CreateAnnotation(Address, Title: Name, Latitude: Latitude, Longitude: Longitude, IconPNG: IconPNG))
}
}
}
}
// Show in the map only the annotations from that specific region
iphoneScaleFactorLatitude = mapView.region.center.latitude
iphoneScaleFactorLongitude = mapView.region.center.longitude
if zoomLevel != mapView.region.span.longitudeDelta {
filterAnnotations(arrAnnotations)
zoomLevel = mapView.region.span.longitudeDelta
CanUpdateMap = true
}
}
func filterAnnotations(arrAnnotations: [MKAnnotation]) {
let latDelta: Double = 0.04 / iphoneScaleFactorLatitude
let lonDelta: Double = 0.04 / iphoneScaleFactorLongitude
var shopsToShow = [AnyObject]()
var arrAnnotationsNew = [MKAnnotation]()
for var i = 0; i < arrAnnotations.count; i++ {
let checkingLocation: MKAnnotation = arrAnnotations[i]
let latitude: Double = checkingLocation.coordinate.latitude
let longitude: Double = checkingLocation.coordinate.longitude
var found: Bool = false
for tempPlacemark: MKAnnotation in shopsToShow as! [MKAnnotation] {
if fabs(tempPlacemark.coordinate.latitude - latitude) < fabs(latDelta) && fabs(tempPlacemark.coordinate.longitude - longitude) < fabs(lonDelta) {
found = true
}
}
if !found {
shopsToShow.append(checkingLocation)
arrAnnotationsNew.append(checkingLocation)
}
}
// Clean the map
for item: MKAnnotation in self.mapRedes.annotations {
myMap.removeAnnotation(item)
}
// Add new annotations to the map
for item: MKAnnotation in arrAnnotationsNew {
myMap.addAnnotation(item)
}
}
func mapView(mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
// This validation should be added, because it will find all the annotations before the map resize
if CanUpdateMap == true {
LoadMap(mapView)
}
}
关于ios - Swift 2 MapKit Annotations - 如何对注释进行分组?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33673266/