CODEWITHSUNDEEP
objective-c
Ian
Ian

Reputation: 1490

Bad receiver type 'double'

I know that this has been asked before but I have gone through some of the previous questions and I cannot relate them to my problem.

I'm trying to develop a class in my application that will handle all of the calculations to be performed but I am having a problem with one of the more simple method calls trying to return a double value. I am pretty new to iOS coding so it is probably something simple that I am doing wrong. Anyway here is the code

P.S. I'm not sure if I have given enough information so if I need to add anything else let me know

from the .m file making the method call

- (void)locationManager:(CLLocationManager *)manager 
        didUpdateToLocation:(CLLocation *)newLocation 
        fromLocation:(CLLocation *)oldLocation
{
    // print the location to the device logs to aid in debugging
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    //this is the problem line here
    //Problem solved thans to trojanfoe and H2CO3
    double currentSpeed = [[BIDCalculations calculateSpeed: newLocation] doubleValue];

    //the problem line was replace with this new line which solved the error
    double currentSpeed = [BIDCalculations calculateSpeed: newLocation];


    // if there is a location to report, print it to the screen
    if (currentLocation != nil) {
        _positionLabel.text = [NSString stringWithFormat:@"%.3f, %.3f",
                               currentLocation.coordinate.longitude,
                               currentLocation.coordinate.latitude];

    }
}

from the .m file where the method is located (the calculations class)

@implementation BIDCalculations

+ (double)calculateSpeed:(CLLocation *)newLocation;
{
    return newLocation.speed;
}

from the .h file for the calculations class

@interface BIDCalculations : NSObject

+ (double)calculateSpeed:(CLLocation *)newLocation;

@end

Upvotes: 1

Views: 4531

Answers (2)

user529758
user529758

Reputation: 

+ (double)calculateSpeed:(CLLocation *)newLocation

That method already returns a double.

double currentSpeed = [BIDCalculations calculateSpeed:newLocation];

is enough.

Upvotes: 0

trojanfoe
trojanfoe

Reputation: 122401

Your method is already returning a double so change the problem line to:

double currentSpeed = [BIDCalculations calculateSpeed:newLocation];

Upvotes: 4

Related Questions