ios - Comparing 2 UIColor(s) -

this must have been asked before, cannot find suitable reference. have found question, compares 3 numbers each other.

i trying compare 2 uicolor(s) avoid duplication. each color referenced in r, g, b, alpha. form colors can control number formatting.

what appropriate way handle this?

all appreciated.

if creating color same way can use ==.

if colors in different color spaces , want compare rgba value use following:

extension uicolor {     func equals(_ rhs: uicolor) -> bool {         var lhsr: cgfloat = 0         var lhsg: cgfloat  = 0         var lhsb: cgfloat = 0         var lhsa: cgfloat  = 0         self.getred(&lhsr, green: &lhsg, blue: &lhsb, alpha: &lhsa)          var rhsr: cgfloat = 0         var rhsg: cgfloat  = 0         var rhsb: cgfloat = 0         var rhsa: cgfloat  = 0         rhs.getred(&rhsr, green: &rhsg, blue: &rhsb, alpha: &rhsa)          return  lhsr == rhsr &&                 lhsg == rhsg &&                 lhsb == rhsb &&                 lhsa == rhsa     } } 

for instance:

let white1 = uicolor.white let white2 = uicolor(colorliteralred: 1, green: 1, blue: 1, alpha: 1) white1 == white2 //false white1.cgcolor == white2.cgcolor //false white1.equals(white2) //true