Variable replacement in init statement, Core Location

[Rojam Nairassoy]

Hello everyone, I am having a slight snag in a program I am creating due to my complete lack of prior objective c knowledge. Anyhow, what I want to do is very simple:

double *latpull = [item objectForKey:@"latitude"];
double *longpull = [item objectForKey:@"longitude"];
						
CLLocation *videoLocation = [[CLLocation alloc] initWithLatitude: *latpull longitude: *longpull];
CLLocationDistance distance = [newLocation getDistanceFrom:videoLocation];

All I am trying to do is substitute values in after initWithLatitude: and longitude:. I am pulling in the numbers for a plist file, and an NSLog reveals that this part is working. Also, if I put in hard values for the CLLocation allocation, this works as well. The documentation states that the latitude and longitude numbers should be doubles, if I read it correctly.

The above code runs with no errors, but fills in 0.00000 for both latitude and longitude when I do an NSLog on videoLocation. I also get a warning for each double statement - warning: initialization from incompatible pointer type.

I know this is a silly mistake for anyone with a hint of coding knowledge, but any assistance would be greatly appreciated! Thanks!

[FlyingDiver]

Originally Posted by Rojam Nairassoy

Hello everyone, I am having a slight snag in a program I am creating due to my complete lack of prior objective c knowledge. Anyhow, what I want to do is very simple:

double *latpull = [item objectForKey:@"latitude"];
double *longpull = [item objectForKey:@"longitude"];
						
CLLocation *videoLocation = [[CLLocation alloc] initWithLatitude: *latpull longitude: *longpull];
CLLocationDistance distance = [newLocation getDistanceFrom:videoLocation];

All I am trying to do is substitute values in after initWithLatitude: and longitude:. I am pulling in the numbers for a plist file, and an NSLog reveals that this part is working. Also, if I put in hard values for the CLLocation allocation, this works as well. The documentation states that the latitude and longitude numbers should be doubles, if I read it correctly.

The above code runs with no errors, but fills in 0.00000 for both latitude and longitude when I do an NSLog on videoLocation. I also get a warning for each double statement - warning: initialization from incompatible pointer type.

I know this is a silly mistake for anyone with a hint of coding knowledge, but any assistance would be greatly appreciated! Thanks!

CLLocation latpull = (CLLocation) [[item objectForKey:@"latitude"] doubleValue];
CLLocation longpull = (CLLocation) [[item objectForKey:@"longitude"] doubleValue];
						
CLLocation *videoLocation = [[CLLocation alloc] initWithLatitude: latpull longitude: longpull];
CLLocationDistance distance = [newLocation getDistanceFrom:videoLocation];

I made the (possibly wrong) assumption that you actually have a string values in the plist.

joe

[Rojam Nairassoy]

Thanks for the quick reply. The values I had in the plist were actual numbers, but I tried the new code both ways, with the values as numbers and strings, and got a few errors.

Under the latpull variable declarations, I got these errors:
Error: conversion to non-scalar type requested
Error: statically allocated instance of Objective-C class 'CLLocation'
Error: statically allocated instance of Objective-C class 'CLLocation'

This is repeated under longpull as well.

Then, under the videoLocation line, I get this error:
Error: incompatible type for argument 1 of 'initWithLatitude:longitude:'
Error: incompatible type for argument 2 of 'initWithLatitude:longitude:'

Many thanks if anyone can solve this one!

[FlyingDiver]

Originally Posted by Rojam Nairassoy

Thanks for the quick reply. The values I had in the plist were actual numbers, but I tried the new code both ways, with the values as numbers and strings, and got a few errors.

Under the latpull variable declarations, I got these errors:
Error: conversion to non-scalar type requested
Error: statically allocated instance of Objective-C class 'CLLocation'
Error: statically allocated instance of Objective-C class 'CLLocation'

This is repeated under longpull as well.

Then, under the videoLocation line, I get this error:
Error: incompatible type for argument 1 of 'initWithLatitude:longitude:'
Error: incompatible type for argument 2 of 'initWithLatitude:longitude:'

Many thanks if anyone can solve this one!

Oops. Typo. Should have been:

CLLocationDegrees latpull = (CLLocationDegrees) [[item objectForKey:@"latitude"] doubleValue];
CLLocationDegrees longpull = (CLLocationDegrees) [[item objectForKey:@"longitude"] doubleValue];
						
CLLocation *videoLocation = [[CLLocation alloc] initWithLatitude: latpull longitude: longpull];
CLLocationDistance distance = [newLocation getDistanceFrom:videoLocation];

joe

[Rojam Nairassoy]

Beautiful! This works great, thanks a lot.