我是Objective C的新手,所以这可能是一个微不足道的问题:
初始化位置后:
CLLocation *currentPoint = [[CLLocation alloc] initWithLatitude:0 longitude:0]:
我怎样才能改变纬度和经度?
答案 0 :(得分:11)
以下是如何修改CLLocation的示例:
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation{
newLocation = [[[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(newLocation.coordinate.latitude, -1.1874988592864875)
altitude:newLocation.altitude
horizontalAccuracy:newLocation.horizontalAccuracy
verticalAccuracy:newLocation.verticalAccuracy
timestamp:newLocation.timestamp] autorelease];
这是另一个如何创建新CLLotation的示例:
CLLocation *newLocation = [[[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(41.44994138650804, -1.1874988592864875)
altitude:0
horizontalAccuracy:0
verticalAccuracy:0
timestamp:[NSDate date]] autorelease];
答案 1 :(得分:1)
CLLocation
个对象是不可变的(你不能改变它们)。根据文件:
通常,您使用CLLocationManager对象根据用户设备的最后已知位置创建此类的实例。但是,如果要缓存自定义位置数据或获取两个不同坐标点之间的距离,则可以自己创建实例。