从GMSMapView中删除GMSPolyline [英] Remove GMSPolyline from GMSMapView

问题描述

我使用GoogleMap-IOS-1.8.1 SDK来显示地图。我必须在地图上绘制可能的GMSPolyline。在发生特定事件后，我只能删除所有GMSPolyline，那么我该怎么做......？
由于GoogleMaps / documentation / ios声称使用两种方法来完成它。

I am using GoogleMap-IOS-1.8.1 SDK for showing map. I have to draw may GMSPolyline on map. After on a particular event i have to remove only all GMSPolyline, so how can i do that...? As GoogleMaps/documentation/ios say to use two method to do it.

 1. [mapView_ clear];
 2. Set your GMSPolyline's map property to nil

第1种方法删除所有Marker和Overlay以及。这是我不想要的。
而对于第二个，我不认为这是保存所有poliline参考的好方法。然后将其设置为零。有没有更好的方法来做到这一点.... ??

Here 1st approach remove all Marker and Overlay as well. which is i don't want. And for 2nd one i don't think that it is good way to save all poliline's reference. and then set it to nil. Is there any better way to do it....??

这里我想要做的。

for (GMSPolyline *polylineToremove  in mapView_.polyline)
    {
      [mapView_ removeOverlay:overlayToRemove];
    }

推荐答案

您只需要设置GMSPolyline地图属性为零。

You just need to set GMSPolyline map property to nil.

GMSPolyline *polyline;
polyline.map = nil;

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