//算距離
CLLocation *currentLocation = [[[CLLocation alloc] initWithLatitude:_nowLocation.latitude longitude:_nowLocation.longitude] autorelease];
CGFloat position_x = [[pBuinessDic objectForKey:@"position_x"] floatValue];
CGFloat position_y = [[pBuinessDic objectForKey:@"position_y"] floatValue];
CLLocationCoordinate2D coor;
coor.latitude = position_x;
coor.longitude = position_y;
CLLocation *Location = [[[CLLocation alloc] initWithLatitude:coor.latitude longitude:coor.longitude] autorelease];
CLLocationDistance distance = [currentLocation distanceFromLocation:Location];
NSString *pDistanceStr = @"";
if (distance<10)
{
pDistanceStr = @"<10m";
}
else if (distance<50)
{
pDistanceStr = @"<50m";
}
else if(distance<1000)
{
pDistanceStr = [NSString stringWithFormat:@"%.0fm",distance];
}
else if(distance>1000)
{
pDistanceStr = [NSString stringWithFormat:@"%.1fkm",distance/1000];
}