ios - How to implement a regex for password validation in Swift? -

i want implement regex validaton passwords in swift? have tried following regex, not successful

([(0-9)(a-z)(!@#$%ˆ&*+-=<>)]+)([a-z]*){6,15} 

my requirement follows: password must more 6 characters, @ least 1 capital, numeric or special character

you can use regex check check password strength

^(?=.*[a-z].*[a-z])(?=.*[!@#$&*])(?=.*[0-9].*[0-9])(?=.*[a-z].*[a-z].*[a-z]).{8}$ 

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regex explanation : -

^                         start anchor (?=.*[a-z].*[a-z])        ensure string has 2 uppercase letters. (?=.*[!@#$&*])            ensure string has 1 special case letter. (?=.*[0-9].*[0-9])        ensure string has 2 digits. (?=.*[a-z].*[a-z].*[a-z]) ensure string has 3 lowercase letters. .{8}                      ensure string of length 8. $                         end anchor. 

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source - rublar link