在 ios 中使用 Google Map sdk 从 GMSMapview 中删除特定的 GMSMarker
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Remove particular GMSMarker from GMSMapview using Google Map sdk in ios
提问by jigs
I am integrating google maps sdk. Its all work fine. But how to remove particular Marker(Pin Point) when second will appear.(I am not using Mapkit)
我正在集成谷歌地图 sdk。它一切正常。但是如何在第二个出现时删除特定的标记（针点）。（我没有使用 Mapkit）
I want the following:
我想要以下内容：
If i tap on map then one marker pin is generate at that location now if i tap on another location on map then two pins are displayed but i want to remove the old marker pin.
如果我点击地图，那么现在会在该位置生成一个标记图钉，如果我点击地图上的另一个位置，则会显示两个图钉，但我想删除旧的标记图钉。
I also use,
我也用，
[self.mapView clear];
But it was clear all other marker points from GMSMapview.
但是从 GMSMapview 中可以清楚地看到所有其他标记点。
Following is the code to add pin on Map:
以下是在地图上添加图钉的代码：
GMSMapView *mapView;
GMSMarker *currLocMarker = [[GMSMarker alloc] init];
currLocMarker.map = nil;
[currLocMarker setTitle:NSLocalizedString(@"current_location_title", nil)];
currLocMarker.icon = [UIImage imageNamed:@"pin_fetch_location.png"];
currLocMarker.position = CLLocationCoordinate2DMake(pCoordinate.latitude, pCoordinate.longitude);
currLocMarker.map = self.mapView;
Please help me to solve out this stuff..!!
请帮我解决这个问题..!!
Thanks in advance..:)
提前致谢..：）
采纳答案by jigs
Yes, I got that solution. Add pin like the following:
是的，我得到了那个解决方案。添加如下所示的引脚：
- (void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D)coordinates {
pCoordinate.latitude =coordinates.latitude;
pCoordinate.longitude =coordinates.longitude;
[[GMSGeocoder geocoder] reverseGeocodeCoordinate:CLLocationCoordinate2DMake(coordinates.latitude, coordinates.longitude) completionHandler:^(GMSReverseGeocodeResponse *resp, NSError *error)
{
[currLocMarker setTitle:NSLocalizedString(@"current_location_title", nil)];
currLocMarker.icon = [UIImage imageNamed:@"pin.png"];
currLocMarker.position = CLLocationCoordinate2DMake(coordinates.latitude, coordinates.longitude);
currLocMarker.map = self.mapView;} ] ;}
Please remove the following line if you used in the above:
如果您在上面使用，请删除以下行：
GMSMarker *currLocMarker = [[GMSMarker alloc] init];
回答by Spydy
To remove a particular pin from GMSMapView keep reference of pin (if there are multiple then use array) then use this code
要从 GMSMapView 中删除特定的引脚，请保留引脚的引用（如果有多个，则使用数组）然后使用此代码
currLocMarker.map = nil;
To remove all things including pins poly lines from GMSMapView use this code
要从 GMSMapView 中删除包括 pin 折线在内的所有内容，请使用此代码
[ _mapView clear];
回答by 3ddy
I made like this:
我是这样制作的：
GMSMarker *myMarker;
- (void)mapView:(GMSMapView *)mapView didTapAtCoordinate:(CLLocationCoordinate2D)coordinate
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
if (myMarker) {
myMarker.map = nil;
myMarker = nil;
}
myMarker = [[GMSMarker alloc] init];
myMarker.position = CLLocationCoordinate2DMake(coordinate.latitude, coordinate.longitude);
myMarker.title = @"title";
myMarker.map = mapView_;
}];
}
and worked well for me !
对我来说效果很好！
回答by Atul Kaushik
This worked for me -
这对我有用-
func removeMarkers(mapView: GMSMapView){
for (index, _) in markers.enumerate() {
//print("Item \(index): \(element)")
self.markers[index].map = nil
}
}
where
在哪里
var markers = [GMSMarker]()
markers contains all the marker overlays for the mapView
标记包含 mapView 的所有标记覆盖
回答by Harin
回答by chings228
loop all marker in the map , and you can use title or snippet to decide which marker you remove
循环地图中的所有标记，您可以使用标题或片段来决定删除哪个标记
as map.markers is no longer to use in google map ios sdk , you need to have a nsmutablearray to store all marker for looping purpose
由于 map.markers 不再在谷歌地图 ios sdk 中使用，您需要有一个 nsmutablearray 来存储所有标记以用于循环目的
and you can make use of userData of the marker , marker.userData , which i prefer to store a nsdictionary information in the marker in order to prevent from duplicate name of title .
并且您可以使用标记的 userData，marker.userData，我更喜欢在标记中存储 nsdictionary 信息，以防止 title 的重复名称。
cheers.
干杯。
回答by iOS
When you tap on specific marker this will remove that marker
当您点击特定标记时，这将删除该标记
- (BOOL)mapView:(GMSMapView *)mapView didTapMarker:(GMSMarker *)marker {
marker.map = nil;
return YES;
}
回答by venkatesan ns
swift 5
迅捷 5
func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool
{
let alertcontrolserver = UIAlertController.init(title : nil, message : "Are you sure you want to Remove ! ", preferredStyle: .alert)
let okbtn = UIAlertAction(title: "Yes", style: .default, handler: { UIAlertAction in marker.map = nil
})
let cancelbtn = UIAlertAction(title: "No", style: .default, handler: nil)
alertcontrolserver.addAction(okbtn)
alertcontrolserver.addAction(cancelbtn)
self.present(alertcontrolserver, animated: true, completion: nil)
return true
}
