高德经纬度距离计算php 距离/面积计算-地图计算工具-开发指南-iOS 地图SDK | 高德地图API...

iOS 地图 SDK中的 MAGeometry.h 中提供了很多计算方法，包括：计算两点距离、矩形面积、坐标转换、判断点是否圆或者多边形内等等，下面做简单介绍，具体的接口可参考：MAGeometry.h。

1、两点间的直线距离计算

根据用户指定的两个经纬度坐标点，计算这两个点间的直线距离，单位为米。代码如下:

//1.将两个经纬度点转成投影点

MAMapPoint point1 = MAMapPointForCoordinate(CLLocationCoordinate2DMake(39.989612,116.480972));

MAMapPoint point2 = MAMapPointForCoordinate(CLLocationCoordinate2DMake(39.990347,116.480441));

//2.计算距离

CLLocationDistance distance = MAMetersBetweenMapPoints(point1,point2);

//1.将两个经纬度点转成投影点

let point1 = MAMapPointForCoordinate(CLLocationCoordinate2D(latitude: 39.989612, longitude: 116.480972))

let point2 = MAMapPointForCoordinate(CLLocationCoordinate2D(latitude: 39.990347, longitude: 116.480441))

//2.计算距离

let distance = MAMetersBetweenMapPoints(point1,point2);

2、判断点是否在圆形内

判断一个点是否在圆内，类似于地理围栏功能，返回YES，表示进入围栏，返回NO，表示离开围栏。

CLLocationCoordinate2D location = CLLocationCoordinate2DMake(39.989612,116.480972);

CLLocationCoordinate2D center = CLLocationCoordinate2DMake(39.990347,116.480441);

BOOL isContains = MACircleContainsCoordinate(location, center, 200);

let location = CLLocationCoordinate2D(latitude: 39.989612, longitude: 116.480972)

let center = CLLocationCoordinate2D(latitude: 39.990347, longitude: 116.480441)

let isContain = MACircleContainsCoordinate(location, center, 200)

3、判断点是否在可视范围内

判断一个用户指定的annotation是否在可视区域。代码如下：

//1.将annotation的经纬度点转成投影点

MAMapPoint point = MAMapPointForCoordinate(annotation.coordinate);

//2.判断该点是否在地图可视范围

BOOL isContains = MAMapRectContainsPoint(mapview.visibleMapRect, point);

//1.将annotation的经纬度点转成投影点

let point = MAMapPointForCoordinate(annotation.centerCoordinate)

//2.判断该点是否在地图可视范围

let isContain = MAMapRectContainsPoint(mapView.visibleMapRect, point)