objective-c C类型数组

CLLocationCoordinate2D不知道有多少会是数组中？

我需要像下面这样构建：

CLLocationCoordinate2D points[4];

 points[0] = CLLocationCoordinate2DMake(41.000512, -109.050116);
 points[1] = CLLocationCoordinate2DMake(41.002371, -102.052066);
 points[2] = CLLocationCoordinate2DMake(36.993076, -102.041981);
 points[3] = CLLocationCoordinate2DMake(36.99892, -109.045267);
           

问题是，我永远不会知道有多少项目将要在数组中，这样我就可以指定计数。有没有一种方法来创建一个CLLocationCoordinate2D数组，只需插入新的坐标不知道什么最终总会是什么？ 编辑：我的最终目标是坐标作出MKPolyline，使用它需要一个CLLocationCoordinate2D数组。

本文地址 ：CodeGo.net/185755/

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// unpacking an array of NSValues into memory
CLLocationCoordinate2D *points = malloc([mutablePoints count] * sizeof(CLLocationCoordinate2D));
for(int i = 0; i < [mutablePoints count]; i++) {
 [[mutablePoints objectAtIndex:i] getValue:(points + i)];
}
MKPolyline *myPolyline = [MKPolyline polylineWithCoordinates:points count:[mutablePoints count]];
free(points);