ios - Regular expression for password validation - Objective C -

i need regular expression can validate following cases,

• be 8 20 characters
• use @ least 1 upper case letter, 1 lower case letter, , 1 number
• not repeat same number or letter more 3 times in row
• not contain spaces, , may use these characters @ # * ( ) + = { } / ? ~ ; , . - _

the closest solution can find

^(?=.*[a-z])(?=.*[a-z])(?=.*\d)(?=.*[^\da-za-z])(?=.*[@(#*){+=}/?~;,._]).{8,20}$ 

but contains following issue,

• accepting space
• can't add - character
• repeating same number or letter more 3 times in row.

edit: fixed repeating character issues , have final expression like,

^(?!.*?(.)\1{3})(?!.* )(?=.*[a-z])(?=.*[a-z])(?=.*\d)(?!.*[:£€&"!'[\]%^\|<>$]).{8,20}$  

but working on online tester [regexr][1]
tried following code generates runtime

- (bool)string:(nsstring *)text matches:(nsstring *)pattern{  nserror *error; nsregularexpression *regex = [nsregularexpression regularexpressionwithpattern:pattern options:0 error:&error];  nsarray *matches = [regex matchesinstring:text options:0 range:nsmakerange(0, text.length)];  return matches.count > 0; 

}