iOS Method Return Multiple Values NSDictionary - ios

Question

I have a method that I call that calculates the Sunrise, Noon and Sunset for any given day. I pass the method the day date as a Julian.
The method need to return the three numbers or strings: Sunrise, Noon and Sunset.
I am trying to call it as follows:
ClassSolarCalculations *LINK = [[ClassSolarCalculations alloc] init];
NSString dateSunrise= [[NSString alloc] initWithFormat:#"%f", [LINK CalculateSunrise: Julian]];
where the Method reads:
(NSDictionary *) CalculateSunrise: (double) Julian;
NSDictionary *returnTimes = [NSDictionary initWithObjectsAndKeys: SunriseText, #"Sunrise", NoonText, "#Noon", SunsetText, #"Sunset", nil];
return returnTimes;
I can this approach to work to return a single value but would like to return all three in one go rather than fudge the solution by calling variants of the routine three times…

Answer 1

Lots of things should be changed here:
method and variable names should start with lowercase letters and use camel case.
Rename your CalculateSunrise: method since it will return more values. Maybe calculateSunTimes:.
Since your method returns an NSDictionary you handling of the return needs to be different.
Try this:
ClassSolarCalculations *link = [[ClassSolarCalculations alloc] init];
NSDictionary *times = [link calculateSunTimes:julian];
NSString *sunrise = times[#"sunrise"];
NSString *noon = times[#"noon"];
NSString *sunset = times[#"sunset"];
Your method would be something like:
- (NSDictionary *)calculateSunTimes:(double)julian {
// calculate the three values:
return #{ #"sunrise" : sunriseText, #"sunset" : sunsetText, #"noon" : noonText };
}
Notice the use of modern Objective-C syntax.