我是 Objective C 的新手，所以这可能是一个小问题：
初始化位置后：
CLLocation *currentPoint = [[CLLocation alloc] initWithLatitude:0 longitude:0]:
以后如何更改纬度和经度？
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];
这是如何创建新 CLLotation 的另一个示例：
CLLocation *newLocation = [[[CLLocation alloc] initWithCoordinate:CLLocationCoordinate2DMake(41.44994138650804, -1.1874988592864875)
altitude:0
horizontalAccuracy:0
verticalAccuracy:0
timestamp:[NSDate date]] autorelease];
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