我正在开发一个 iOS 应用程序,我希望它显示给定半径内的所有标记。
我正在使用 GMSGeometryDistance 计算所有标记距离并返回我给定半径内的距离。
当前位置会频繁变化。这意味着每次更改位置时我都需要计算此值,这会影响应用性能。
是否有任何函数可以计算用户移动的每个给定距离?
<p>
I get all the markers with in the given radius by using below code.Please check it once.Hope it will help to you. </p>
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`CLLocationDistance dist = 800; // required radius in meters.
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CLLocation *closestLocation;
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// finalArr(NsMutableArray) stores coordinates fetching from database
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for (CLLocation *location in finalArr) {
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CLLocationDistance distance = [currentLoc distanceFromLocation:location];
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if (distance < dist) {
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closestLocation = location;
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[closeLatArr addObject(closestLocation.coordinate.latitude)];
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[closeLongArr addObject(closestLocation.coordinate.longitude)];
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}
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for (int i=0; i<[closeLatArr count]; i++) {
GMSMarker *marker = [[GMSMarker alloc] init];
marker.position = CLLocationCoordinate2DMake([[closeLatArr objectAtIndex:i] doubleValue], [[closeLongArr objectAtIndex:i] doubleValue]);
// marker.title = [locArr objectAtIndex:i];
marker.map = mapView;
//NSLog(@"closest loc are %@",locArr);
}`
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</table>
</p>
关于ios - 谷歌地图 - 获取给定半径内的所有标记,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48132936/
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