1、计算两个经纬度之间的距离
<span style="white-space:pre"> </span>CLLocation *orig=[[[CLLocation alloc] initWithLatitude:[mainDelegate.latitude_self doubleValue] longitude:[mainDelegate.longitude_self doubleValue]] autorelease];
<span style="white-space:pre"> </span>CLLocation* dist=[[[CLLocation alloc] initWithLatitude:[tmpNewsModel.latitude doubleValue] longitude:[tmpNewsModel.longitude doubleValue] ] autorelease];
<span style="white-space:pre"> </span>CLLocationDistance kilometers=[orig distanceFromLocation:dist]/1000;
<span style="white-space:pre"> </span>NSLog(@"距离:",kilometers);
2、根据经纬度获取具体位置(多种方法)(待续)