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我在CLLocation distanceFromLocation中遇到了一些问题。我有下面的代码,格式化为帮助调试,明确分配两个新的位置等。无论哪种方式,两个几乎相同的位置导致巨大的差距,但只是有时。CLLocation distanceFromLocation large value
代码:
CLLocation *loc = [LightweightLocationTracker sharedLocationTracker].lastLocation;
if (loc)
{
CLLocation *myLoc = [[CLLocation alloc] initWithLatitude:loc.coordinate.latitude longitude:loc.coordinate.longitude];
CLLocation *productLoc = [[CLLocation alloc] initWithLatitude:self.productToView.latitude longitude:self.productToView.longitude];
CLLocationDistance dist = [myLoc distanceFromLocation:productLoc];
NSLog(@"myLoc.coordinate.latitude %f", myLoc.coordinate.latitude);
NSLog(@"myLoc.coordinate.longitude %f", myLoc.coordinate.longitude);
NSLog(@"productLoc.coordinate.latitude %f", productLoc.coordinate.latitude);
NSLog(@"productLoc.coordinate.longitude %f", productLoc.coordinate.longitude);
NSLog(@"dist %f", dist);
NSLog(@"%1.1f km", dist);
}
一个运行TTY:
[] tapped main
[] myLoc.coordinate.latitude 52.369200
[] myLoc.coordinate.longitude 13.941100
[] productLoc.coordinate.latitude 52.364400
[] productLoc.coordinate.longitude 13.360600
[] dist 39542.386770
[] 39542.4 km
另一个运行TTY:
[] myLoc.coordinate.latitude 52.369200
[] myLoc.coordinate.longitude 13.941100
[] productLoc.coordinate.latitude 52.369202
[] productLoc.coordinate.longitude 13.941100
[] dist 0.184915
[] 0.2 km
没有看到的罪魁祸首......
谢谢。显然为时已晚,试图做到这一点。在另一个版本中甚至有dist/1000.0f。哦,尴尬! – laverick 2012-08-03 06:21:56