How to get the sunrise/ sunset time for remote location in their timezone, not device timezone when using open weather api, in Objective C? - objective-c

Question

I am getting the sunrise/sunset time but it is in the timezone that my device is using. For example, I am in New York, when I look up cities that are in EST, it returns the sunrise/sunset time in the right timezone. But if I look up Dubai, the hours are off. The sunset time returned for Dubai is 10:57PM. Which is the time in New York(EST) when the sun sets in Dubai.
Here is my OpenWeatherAPI response-
base = stations;
clouds = {
all = 20;
};
cod = 200;
coord = {
lat = "25.27";
lon = "55.3";
};
dt = 1565620936;
id = 292223;
main = {
humidity = 71;
pressure = 995;
temp = 36;
"temp_max" = 36;
"temp_min" = 36;
};
name = Dubai;
sys = {
country = AE;
id = 7537;
message = "0.0067";
sunrise = 1565574654;
sunset = 1565621827;
type = 1;
};
timezone = 14400;
visibility = 7000;
weather = (
{
description = "few clouds";
icon = 02d;
id = 801;
main = Clouds;
}
);
wind = {
deg = 340;
speed = "4.6";
};
How do I get the sunrise/sunset time in the remote time zone that I am querying in Objective-C?

Answer 1

I figured it out, this is how you do it-
You use the timezone field returned in the API response and set it as the offset.
double offset = [json[#"timezone"]doubleValue]; //getting timezone offset
double sunriseTimestampval = [json[#"sys"][#"sunrise"]doubleValue];
NSTimeInterval sunriseTimestamp = (NSTimeInterval)sunriseTimestampval;
NSDate* sunriseDate = [NSDate dateWithTimeIntervalSince1970:sunriseTimestamp];
NSDateFormatter *sunriseDateFormatter = [[NSDateFormatter alloc] init];
[sunriseDateFormatter setDateFormat:#"hh:mm"];
[sunriseDateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:offset]];//->Converting to remote timezone
NSString *sunriseTime = [sunriseDateFormatter stringFromDate:sunriseDate];