How to calculate magnetic heading value to get geographical direction i.e., North, North-East, East, East-South, South, South-West, West, West-North?
As magnetic heading returns only value of degree and its required for me to show the geographical direction, on the basis of continuous updated magnetic heading.
How can I make it possible?
Below is the code that I have used to display continuously updating geographical direction.
CGFloat currentHeading = newHeading.magneticHeading;
NSString *strDirection = [[NSString alloc] init];
if(gradToRotate >23 && gradToRotate <= 67){
strDirection = @"NE";
} else if(gradToRotate >68 && gradToRotate <= 112){
strDirection = @"E";
} else if(gradToRotate >113 && gradToRotate <= 167){
strDirection = @"SE";
} else if(gradToRotate >168 && gradToRotate <= 202){
strDirection = @"S";
} else if(gradToRotate >203 && gradToRotate <= 247){
strDirection = @"SW";
} else if(gradToRotate >248 && gradToRotate <= 293){
strDirection = @"W";
} else if(gradToRotate >294 && gradToRotate <= 337){
strDirection = @"NW";
} else if(gradToRotate >=338 || gradToRotate <= 22){
strDirection = @"N";
}
It is working fine at my end. Masters are welcome to let me know if any modification required.