以kml为单位存储在mapview上绘制的圆的数据

Question

有没有人有想法存储在kml文件中叠加在mapview上的圆坐标

任何帮助都会很明显

Answer 1

1.使用此iOS框架解析/生成KML文件：Simple-KML

2.Calculate circle coordinates

    NSMutableArray * circleCoordinates = [NSMutableArray array];
    CGPoint centerCoordinate = CGPointMake(37.422f, -122.082f);
    int steps = 1000; // bigger steps, smoother circle you get
    float radius = 10.0;
    for (int i = 0; i < steps; i++) {
        KMLCoordinate *coordinate = [KMLCoordinate new];
        coordinate.latitude = centerCoordinate.x + radius * cos(2 * M_PI * i / steps);
        coordinate.longitude = centerCoordinate.y + radius * sin(2 * M_PI * i / steps);
        [circleCoordinates addObject:coordinate];
    }

3.由你得到的circleCoordinates生成框架的KML文件。

顺便说一句：你可以使用这个web KML Circle Generator来了解圆形KML文件的样子