ios - Rounding half to even -

what's formula banker's rounding in swift language?

for example: 134.5675 becomes 134 , 135.5345 becomes 136

thus far i've tried this:

extension double {     func roundhalftoeven() -> double {         return round(self * 100) / 100     } }

but it's near returns need.

remove multiplying , dividing 100. use lrint (instead of round), rounds input nearest integer.

Two