How dangerous is it to compare floating point values?

Question

I know UIKit uses CGFloat because of the resolution independent coordinate system.

But every time I want to check if for example fram

Answer 1

-(BOOL)isFloatEqual:(CGFloat)firstValue secondValue:(CGFloat)secondValue{

BOOL isEqual = NO;

NSNumber *firstValueNumber = [NSNumber numberWithDouble:firstValue];
NSNumber *secondValueNumber = [NSNumber numberWithDouble:secondValue];

isEqual = [firstValueNumber isEqualToNumber:secondValueNumber];

return isEqual;

}