我正在使用iOS中的swift在Google地图上实现多个标记。我已成功将所有标记放置在地图上,并可以使用“ didTap标记”方法选择标记。但是我无法取消选择它。当用户选择一个标记时,应取消选择其余标记。
extension MapVC {
// Mark:- Create Marker and set position
fileprivate func setMarkerOnMap() {
if self.markerArray.count != 0 {
for i in 0...self.markerArray.count - 1 {
let data = self.markerArray[i]
guard let lat = data.lat else {
return
}
guard let lon = data.long else {
return
}
let camera: GMSCameraPosition = GMSCameraPosition.camera(withLatitude: Double(lat)!, longitude: Double(lon)!, zoom: zoomLevel)
showMarker(position: camera.target, index: i)
}
}
}
// Mark:- Show marker on map
fileprivate func showMarker(position: CLLocationCoordinate2D, inde x: Int) {
let marker = GMSMarker()
marker.position = position
marker.icon = UIImage(named: "marker-unselected-icon")
marker.accessibilityLabel = "\(index)" // get index from array when click on each marker to identify
marker.map = self.mapView
}
}
//MARK - Map
extension MapVC: GMSMapViewDelegate {
// MARK:- DidTap marker
func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker)-> Bool {
if let markerLbl = marker.accessibilityLabel{
index = Int(markerLbl)
}
if marker != self.userMarker{
marker.icon = UIImage(named: "marker-selected-icon")
self.restaurantDetailView.isHidden = false
self.distanceView.isHidden = true
self.infoView.isHidden = true
}
var isReturn = true
mapView.selectedMarker = nil
if self.markerArray.count != 0 {
for i in 0...markerArray.count - 1 {
if i == index {
let storeInfo = markerArray[i]
storeInfo.isSelected = !storeInfo.isSelected
self.destinationLat = Double(storeInfo.lat!)!
self.destinationLng = Double(storeInfo.long!)!
marker.icon = UIImage(named: "marker-selected-icon")
markerArray[i] = storeInfo
} else {
marker.icon = UIImage(named: "marker-unselected-icon")
let storeInfo = markerArray[i]
storeInfo.isSelected = false
markerArray[i] = storeInfo
}
}
} else {
mapView.selectedMarker = nil
isReturn = true
return isReturn
}
return isReturn
}
}
我正在使用did Tap方法更改选定的标记图像,但是很遗憾,它不起作用。我不知道我在做什么错。提前致谢。
答案 0 :(得分:0)
当用户想要选择一个标记并想要取消选择所有其他标记时,下面的代码会很有用。
要取消选择地图上的所有标记:
for (marker in self.markerArray) {
self.mapview.selectedMarker = nil
}
在地图上选择标记:
self.mapView.selectedMarker = self.userMarker